EXHIBIT 99.1

                          BA MORTGAGE SECURITIES, INC.
                       MORTGAGE PASS-THROUGH CERTIFICATES
                                  SERIES 1998-1



                         STATEMENT TO CERTIFICATEHOLDERS

 Statements are available online at http://www-apps.gis.deutsche-bank.com/invr.
    Statement posting begins 7:00 PM Eastern time the business day prior to
                                 distribution.
<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
                                                     DISTRIBUTIONS IN DOLLARS
                                       PRIOR                                                                               CURRENT
                     ORIGINAL      PRINCIPAL                                                 REALIZED      DEFERRED      PRINCIPAL
     CLASS         FACE VALUE        BALANCE      INTEREST     PRINCIPAL          TOTAL        LOSSES      INTEREST        BALANCE
------------------------------------------------------------------------------------------------------------------------------------
<S>            <C>            <C>               <C>         <C>            <C>                   <C>           <C>  <C>
     P1-M           21,501.00       8,245.53          0.00          9.36           9.36          0.00          0.00       8,236.17
     P2-M          350,133.00     233,110.91          0.00      1,504.72       1,504.72          0.00          0.00     231,606.19
     X1-M *    142,084,361.67  71,157,177.42     30,155.72          0.00      30,155.72          0.00          0.00  67,726,646.46
     X2-M *    187,559,494.52  85,291,290.11     14,809.58          0.00      14,809.58          0.00          0.00  80,026,720.28
     Y1             71,698.81      34,066.57        191.48      1,343.72       1,535.20          0.00          0.00      32,722.85
     Y2             99,676.65      41,416.80        224.18      1,790.21       2,014.39          0.00          0.00      39,626.59
     Z1        143,556,266.44  72,274,985.65    406,257.44  3,430,152.24   3,836,409.68          0.00          0.00  68,844,833.41
     Z2        199,253,620.42  92,957,637.36    503,162.20  5,317,907.87   5,821,070.07          0.00          0.00  87,639,729.49
     R-I                50.00           0.00          0.00          0.00           0.00          0.00          0.00           0.00


------------------------------------------------------------------------------------------------------------------------------------
TOTALS         343,352,946.32 165,549,462.82    954,800.60  8,752,708.12   9,707,508.72          0.00          0.00 156,796,754.70
------------------------------------------------------------------------------------------------------------------------------------
  *Notional Class Balance
</TABLE>


<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
                            FACTOR INFORMATION PER $1000 OF ORIGINAL FACE                                     PASS-THROUGH
                                       PRIOR                                                  CURRENT            RATES
                                   PRINCIPAL                                                PRINCIPAL
     CLASS          CUSIP            BALANCE      INTEREST     PRINCIPAL          TOTAL       BALANCE       CURRENT           NEXT
------------------------------------------------------------------------------------------------------------------------------------
<S>             <C>                 <C>           <C>           <C>            <C>           <C>          <C>            <C>
     P1-M                         383.495186      0.000000      0.435329       0.435329    383.059858     0.000000%      0.000000%
     P2-M                         665.778176      0.000000      4.297567       4.297567    661.480609     0.000000%      0.000000%
     X1-M *                       500.809354      0.212238      0.000000       0.212238    476.665030     0.508911%      0.508911%
     X2-M *                       454.742589      0.078959      0.000000       0.078959    426.673789     0.208511%      0.208511%
     Y1                           475.134369      2.670616     18.741237      21.411853    456.393193     6.750000%      6.750000%
     Y2                           415.511563      2.249072     17.960136      20.209209    397.551388     6.500000%      6.500000%
     Z1                           503.461029      2.829953     23.894131      26.724084    479.566898     6.750000%      6.750000%
     Z2                           466.529226      2.525235     26.689141      29.214375    439.840086     6.500000%      6.500000%
     R-I        055240DQ5           0.000000      0.000000      0.000000       0.000000      0.000000     6.750000%      6.750000%

------------------------------------------------------------------------------------------------------------------------------------
SELLER:                                    Bank of America                      ADMINISTRATOR:                Eiko Akiyama
SERVICER:                                  Bank of America                                                   Deutsche Bank
LEAD UNDERWRITER:                    Donaldson, Lufkin & Jenrette                                       1761 E. St. Andrew Place
RECORD DATE:                              November 30, 2001                                               Santa Ana, CA 92705
DISTRIBUTION DATE:                        December 26, 2001                          FACTOR INFORMATION:     (800) 735-7777
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>

                                    Page 1 of 5 (C) COPYRIGHT 2001 Deutsche Bank


<PAGE>


                          BA MORTGAGE SECURITIES, INC.
                       MORTGAGE PASS-THROUGH CERTIFICATES
                                  SERIES 1998-1

                         STATEMENT TO CERTIFICATEHOLDERS

 Statements are available online at http://www-apps.gis.deutsche-bank.com/invr.
    Statement posting begins 7:00 PM Eastern time the business day prior to
                                 distribution.
<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
                                                     DISTRIBUTIONS IN DOLLARS
                                       PRIOR                                                                               CURRENT
                     ORIGINAL      PRINCIPAL                                                 REALIZED      DEFERRED      PRINCIPAL
     CLASS         FACE VALUE        BALANCE      INTEREST     PRINCIPAL          TOTAL        LOSSES      INTEREST        BALANCE
------------------------------------------------------------------------------------------------------------------------------------
<S>            <C>            <C>               <C>         <C>            <C>                   <C>           <C>  <C>
     IA-1       96,101,504.00  24,939,397.80    140,184.27  3,427,664.05   3,567,848.32          0.00          0.00  21,511,733.75
     IA-2        5,000,000.00   5,000,000.00     28,104.98          0.00      28,104.98          0.00          0.00   5,000,000.00
     IA-3        9,500,000.00   9,500,000.00     53,399.47          0.00      53,399.47          0.00          0.00   9,500,000.00
     IA-4       14,250,000.00  14,250,000.00     80,099.20          0.00      80,099.20          0.00          0.00  14,250,000.00
     IA-5        4,887,000.00   4,887,000.00     27,469.82          0.00      27,469.82          0.00          0.00   4,887,000.00
     IA-6        9,939,000.00   9,939,000.00     55,867.09          0.00      55,867.09          0.00          0.00   9,939,000.00
     I-X *      11,983,709.00   5,364,836.10     30,155.72          0.00      30,155.72          0.00          0.00   5,083,624.11
     I-PO           21,501.00       8,245.53          0.00          9.36           9.36          0.00          0.00       8,236.17
     IIA-1     121,111,453.00  55,218,111.04    298,885.23  3,308,637.40   3,607,522.63          0.00          0.00  51,909,473.64
     IIA-2       1,000,000.00     249,767.10      1,351.95     38,817.49      40,169.44          0.00          0.00     210,949.61
     IIA-3       8,262,000.00   8,262,000.00     44,720.65          0.00      44,720.65          0.00          0.00   8,262,000.00
     IIA-4      14,913,749.00  12,524,751.27     67,794.12     63,105.39     130,899.51          0.00          0.00  12,461,645.88
     IIA-5      46,447,250.00  12,132,248.28     65,669.57  1,885,530.51   1,951,200.08          0.00          0.00  10,246,717.77
     IIA-6       2,127,000.00           0.00          0.00          0.00           0.00          0.00          0.00           0.00
     II-X *      7,513,508.12   2,736,024.76     14,809.58          0.00      14,809.58          0.00          0.00   2,523,885.30
     II-PO         350,133.00     233,110.91          0.00      1,504.72       1,504.72          0.00          0.00     231,606.19


------------------------------------------------------------------------------------------------------------------------------------
TOTALS         333,910,590.00 157,143,631.93    908,511.65  8,725,268.92   9,633,780.57          0.00          0.00 148,418,363.01
------------------------------------------------------------------------------------------------------------------------------------
*Notional Class Balance
</TABLE>


<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
                            FACTOR INFORMATION PER $1000 OF ORIGINAL FACE                                     PASS-THROUGH
                                       PRIOR                                                  CURRENT            RATES
                                   PRINCIPAL                                                PRINCIPAL
     CLASS          CUSIP            BALANCE      INTEREST     PRINCIPAL          TOTAL       BALANCE       CURRENT           NEXT
------------------------------------------------------------------------------------------------------------------------------------
<S>             <C>               <C>             <C>          <C>            <C>          <C>            <C>            <C>
     IA-1       055240CT0         259.511004      1.458710     35.667122      37.125832    223.843882     6.750000%      6.750000%
     IA-2       055240CU7       1,000.000000      5.620996      0.000000       5.620996  1,000.000000     6.750000%      6.750000%
     IA-3       055240CV5       1,000.000000      5.620997      0.000000       5.620997  1,000.000000     6.750000%      6.750000%
     IA-4       055240CW3       1,000.000000      5.620996      0.000000       5.620996  1,000.000000     6.750000%      6.750000%
     IA-5       055240CX1       1,000.000000      5.620999      0.000000       5.620999  1,000.000000     6.750000%      6.750000%
     IA-6       055240CY9       1,000.000000      5.620997      0.000000       5.620997  1,000.000000     6.750000%      6.750000%
     I-X *      055240DF9         447.677435      5.620996      0.000000       5.620996    424.211245     6.750000%      0.000000%
     I-PO       055240DH5         383.495186      0.000000      0.435329       0.435329    383.059858     0.000000%      6.500000%
     IIA-1      055240CZ6         455.928070      2.467853     27.318947      29.786800    428.609123     6.500000%      6.500000%
     IIA-2      055240DA0         249.767100      1.351950     38.817490      40.169440    210.949610     6.500000%      6.500000%
     IIA-3      055240DB8       1,000.000000      5.412812      0.000000       5.412812  1,000.000000     6.500000%      6.500000%
     IIA-4      055240DC6         839.812395      4.545746      4.231357       8.777103    835.581039     6.500000%      6.500000%
     IIA-5      055240DD4         261.204878      1.413853     40.595095      42.008947    220.609784     6.500000%      6.500000%
     IIA-6      055240DE2           0.000000      0.000000      0.000000       0.000000      0.000000     6.500000%      6.500000%
     II-X *     055240DG7         364.147442      1.971061      0.000000       1.971061    335.913033     6.500000%      0.000000%
     II-PO      055240DU6         665.778176      0.000000      4.297567       4.297567    661.480609     0.000000%      0.000000%



------------------------------------------------------------------------------------------------------------------------------------
SELLER:                                    Bank of America                      ADMINISTRATOR:                Eiko Akiyama
SERVICER:                                  Bank of America                                                   Deutsche Bank
LEAD UNDERWRITER:                    Donaldson, Lufkin & Jenrette                                       1761 E. St. Andrew Place
RECORD DATE:                              November 30, 2001                                               Santa Ana, CA 92705
DISTRIBUTION DATE:                        December 26, 2001                     FACTOR INFORMATION:          (800) 735-7777
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
                                    Page 2 of 5 (C) COPYRIGHT 2001 Deutsche Bank


<PAGE>


                          BA MORTGAGE SECURITIES, INC.
                       MORTGAGE PASS-THROUGH CERTIFICATES
                                  SERIES 1998-1

                         STATEMENT TO CERTIFICATEHOLDERS

 Statements are available online at http://www-apps.gis.deutsche-bank.com/invr.
    Statement posting begins 7:00 PM Eastern time the business day prior to
                                 distribution.
<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
                                                     DISTRIBUTIONS IN DOLLARS
                                       PRIOR                                                                               CURRENT
                     ORIGINAL      PRINCIPAL                                                 REALIZED      DEFERRED      PRINCIPAL
     CLASS         FACE VALUE        BALANCE      INTEREST     PRINCIPAL          TOTAL        LOSSES      INTEREST        BALANCE
------------------------------------------------------------------------------------------------------------------------------------
<S>              <C>            <C>              <C>           <C>            <C>                <C>           <C>    <C>
     M           3,776,882.00   3,362,331.89     18,515.58     10,975.68      29,491.26          0.00          0.00   3,351,356.21
     B-1         2,231,794.00   1,986,832.51     10,941.03      6,485.63      17,426.66          0.00          0.00   1,980,346.88
     B-2         1,201,735.00   1,069,832.74      5,891.32      3,492.26       9,383.58          0.00          0.00   1,066,340.48
     B-3         1,030,060.00     917,000.73      5,049.71      2,993.37       8,043.08          0.00          0.00     914,007.36
     B-4           515,029.00     458,499.48      2,524.85      1,496.68       4,021.53          0.00          0.00     457,002.80
     B-5           686,706.32     611,333.55      3,366.47      1,995.57       5,362.04          0.00          0.00     609,337.98
     R-II               50.00           0.00          0.00          0.00           0.00          0.00          0.00           0.00

------------------------------------------------------------------------------------------------------------------------------------
TOTALS           9,442,256.32   8,405,830.90     46,288.96     27,439.19      73,728.15          0.00          0.00   8,378,391.71
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>


<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
                            FACTOR INFORMATION PER $1000 OF ORIGINAL FACE                                     PASS-THROUGH
                                       PRIOR                                                  CURRENT            RATES
                                   PRINCIPAL                                                PRINCIPAL
     CLASS          CUSIP            BALANCE      INTEREST     PRINCIPAL          TOTAL       BALANCE       CURRENT           NEXT
------------------------------------------------------------------------------------------------------------------------------------
<S>             <C>               <C>             <C>           <C>            <C>         <C>            <C>            <C>
     M          055240DJ1         890.240121      4.902345      2.906016       7.808362    887.334105     6.612828%      6.613072%
     B-1        055240DK8         890.240098      4.902348      2.906016       7.808364    887.334082     6.612828%      6.613072%
     B-2        055240DL6         890.240144      4.902345      2.906015       7.808360    887.334129     6.612828%      6.613072%
     B-3        055240DM4         890.240112      4.902345      2.906015       7.808361    887.334097     6.612828%      6.613072%
     B-4        055240DN2         890.240122      4.902345      2.906011       7.808356    887.334111     6.612828%      6.613072%
     B-5        055240DP7         890.240168      4.902343      2.906002       7.808345    887.334166     6.612828%      6.613072%
     R-II       055240DR3           0.000000      0.000000      0.000000       0.000000      0.000000     6.750000%      6.750000%


------------------------------------------------------------------------------------------------------------------------------------
SELLER:                                    Bank of America                      ADMINISTRATOR:                Eiko Akiyama
SERVICER:                                  Bank of America                                                   Deutsche Bank
LEAD UNDERWRITER:                    Donaldson, Lufkin & Jenrette                                       1761 E. St. Andrew Place
RECORD DATE:                              November 30, 2001                                               Santa Ana, CA 92705
DISTRIBUTION DATE:                        December 26, 2001                     FACTOR INFORMATION:          (800) 735-7777
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
                                    Page 3 of 5 (C) COPYRIGHT 2001 Deutsche Bank


<PAGE>


                          BA MORTGAGE SECURITIES, INC.
                       MORTGAGE PASS-THROUGH CERTIFICATES
                                  SERIES 1998-1

                         STATEMENT TO CERTIFICATEHOLDERS

<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
Distribution Date:            December 26, 2001
------------------------------------------------------------------------------------------------------------------------------------

MORTGAGE POOL INFORMATION:                                                  GROUP I                     GROUP II
--------------------------                                                  -------                     --------

<S>                                                                       <C>                         <C>
                BEGINNING BALANCE OF POOL                                 72,317,297.62               93,232,165.39
                LESS:         SCHEDULED PRINCIPAL                            (80,082.10)                (469,767.02)
                              PRINCIPAL PREPAYMENTS                       (3,351,792.28)              (4,851,066.73)
                              REPURCHASES                                          0.00                        0.00
                              LIQUIDATIONS                                         0.00                        0.00
                              OTHER UNSCHEDULED PRINCIPAL                          0.00                        0.00
                                                                          -------------               -------------
                ENDING BALANCE OF POOL                                    68,885,423.24               87,911,331.64
                                                                          =============               =============

                BEGINNING NUMBER OF LOANS IN POOL                                   233                         325
                ENDING NUMBER OF LOANS IN POOL                                      221                         309

                WEIGHTED AVERAGE REMAINING TERM TO MATURITY                         300                         129
                WEIGHTED AVERAGE NET CONTRACT RATE                            7.499977%                   7.052374%

                CURRENT REALIZED LOSSES ON THE POOL                                0.00                        0.00
                CUMULATIVE REALIZED LOSSES ON THE POOL                             0.00                        0.00

                BEGINNING POOL BALANCE OF PREMIUM LOANS                   71,157,177.42               85,291,290.11
                STRIPPED INTEREST RATE                                        0.508911%                   0.208511%
</TABLE>

<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
DELINQUENT, BANKRUPTCY,                                                                     LOANS         LOANS         LOANS
FORECLOSURE, AND REO                           30 TO 59      60 TO 89       90 PLUS          IN            IN             IN
LOAN INFORMATION                                 DAYS          DAYS           DAYS       BANKRUPTCY    FORECLOSURE       REO
------------------------------------------------------------------------------------------------------------------------------------
<S>                                                <C>           <C>         <C>              <C>        <C>               <C>
GROUP I         PRINCIPAL BALANCE                     0.00          0.00     227,944.90          0.00    248,372.09           0.00
                     PERCENTAGE OF GROUP BAL.      0.0000%       0.0000%        0.1454%       0.0000%       0.1584%        0.0000%
                NUMBER OF LOANS                          0             0              1             0             1              0
                     PERCENTAGE OF LOANS           0.0000%       0.0000%        0.1887%       0.0000%       0.1887%        0.0000%
GROUP II        PRINCIPAL BALANCE                     0.00          0.00           0.00          0.00          0.00           0.00
                     PERCENTAGE OF GROUP BAL.      0.0000%       0.0000%        0.0000%       0.0000%       0.0000%        0.0000%
                NUMBER OF LOANS                          0             0              0             0             0              0
                     PERCENTAGE OF LOANS           0.0000%       0.0000%        0.0000%       0.0000%       0.0000%        0.0000%
------------------------------------------------------------------------------------------------------------------------------------
                GROUP I BOOK VALUE OF REO PROPERTIES                                                             NA
                GROUP II BOOK VALUE OF REO PROPERTIES                                                            NA
</TABLE>

<TABLE>
<CAPTION>
SERVICING INFORMATION:                                                      GROUP I                     GROUP II
----------------------                                                      -------                     --------

<S>                                                                           <C>                         <C>
                SERVICING FEES ACCRUED DURING THE CURRENT DUE PERIOD          15,066.11                   29,358.39
                PLUS:         ADDITIONAL SERVICING COMPENSATION                    0.00                        0.00
                LESS:         AMTS. TO COVER PREPAYMENT INT. SHORTFALL       (13,749.22)                  (9,203.27)
                              DELINQUENT SERVICING FEES                       (1,316.89)                  (2,221.82)
                                                                          -------------               -------------
                SERVICING FEES COLLECTED FOR THE CURRENT DUE PERIOD               (0.00)                  17,933.30
                                                                          =============               =============

                ADVANCED PRINCIPAL                                             6,982.64                   40,331.06
                ADVANCED INTEREST                                             38,095.80                   41,113.34
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
                                    Page 4 of 5 (C) COPYRIGHT 2001 Deutsche Bank


<PAGE>


                          BA MORTGAGE SECURITIES, INC.
                       MORTGAGE PASS-THROUGH CERTIFICATES
                                  SERIES 1998-1

                         STATEMENT TO CERTIFICATEHOLDERS
<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
Distribution Date:            December 26, 2001
------------------------------------------------------------------------------------------------------------------------------------
                                                 OTHER                                   CUMULATIVE
                                PREPAYMENT    UNSCHEDULED                 CERTIFICATE      UNPAID                     CUMULATIVE
                                PRINCIPAL      PRINCIPAL                    INTEREST      INTEREST                     REALIZED
     CLASS                     DISTRIBUTED    DISTRIBUTED                  SHORTFALL      SHORTFALL                     LOSSES
------------------------------------------------------------------------------------------------------------------------------------
<S>                             <C>                   <C>                          <C>           <C>                          <C>
       CLASS IA-1               3,351,783.13          0.00                         0.00          0.00                         0.00
       CLASS IA-2                       0.00          0.00                         0.00          0.00                         0.00
       CLASS IA-3                       0.00          0.00                         0.00          0.00                         0.00
       CLASS IA-4                       0.00          0.00                         0.00          0.00                         0.00
       CLASS IA-5                       0.00          0.00                         0.00          0.00                         0.00
       CLASS IA-6                       0.00          0.00                         0.00          0.00                         0.00
       CLASS I-X                        0.00          0.00                         0.00          0.00                         0.00
       CLASS I-PO                       9.15          0.00                         0.00          0.00                         0.00
       CLASS IIA-1              3,029,755.82          0.00                         0.00          0.00                         0.00
       CLASS IIA-2                 35,545.60          0.00                         0.00          0.00                         0.00
       CLASS IIA-3                      0.00          0.00                         0.00          0.00                         0.00
       CLASS IIA-4                 57,786.30          0.00                         0.00          0.00                         0.00
       CLASS IIA-5              1,726,601.12          0.00                         0.00          0.00                         0.00
       CLASS IIA-6                      0.00          0.00                         0.00          0.00                         0.00
       CLASS II-X                       0.00          0.00                         0.00          0.00                         0.00
       CLASS II-PO                  1,377.89          0.00                         0.00          0.00                         0.00
       CLASS M                          0.00          0.00                         0.00          0.00                         0.00
       CLASS B-1                        0.00          0.00                         0.00          0.00                         0.00
       CLASS B-2                        0.00          0.00                         0.00          0.00                         0.00
       CLASS B-3                        0.00          0.00                         0.00          0.00                         0.00
       CLASS B-4                        0.00          0.00                         0.00          0.00                         0.00
       CLASS B-5                        0.00          0.00                         0.00          0.00                         0.00
------------------------------------------------------------------------------------------------------------------------------------
    TOTALS                      8,202,859.01          0.00                         0.00          0.00                         0.00
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>


<TABLE>
<CAPTION>

<S>                                                                                                          <C>
                OTHER REPORTING ITEMS:

                GROUP I PERCENTAGE                                                                           94.75%
                GROUP I PREPAYMENT PERCENTAGE                                                               100.00%
                GROUP II PERCENTAGE                                                                          95.04%
                GROUP II PREPAYMENT PERCENTAGE                                                              100.00%

                SUBORDINATE PRINCIPAL DISTRIBUTION AMOUNT                                                 27,439.21
                HAS THE CREDIT SUPPORT DEPLETION DATE OCCURRED                                                   No

                BANKRUPTCY AMOUNT                                                                        100,000.00
                FRAUD LOSS AMOUNT                                                                        119,926.36
                SPECIAL HAZARD AMOUNT                                                                  4,500,664.47
                EXTRAORDINARY LOSSES FOR THE PRIOR PERIOD                                                      0.00

                GROUP I EXTRAORDINARY LOSSES                                                                   0.00
                GROUP II EXTRAORDINARY LOSSES                                                                  0.00

------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
                                    Page 5 of 5 (C) COPYRIGHT 2001 Deutsche Bank


<PAGE>

                          BA MORTGAGE SECURITIES, INC.
                       MORTGAGE PASS-THROUGH CERTIFICATES
                                  SERIES 1998-1

                         STATEMENT TO CERTIFICATEHOLDERS

 Statements are available online at http://www-apps.gis.deutsche-bank.com/invr.
    Statement posting begins 7:00 PM Eastern time the business day prior to
                                 distribution.

<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
                                                     DISTRIBUTIONS IN DOLLARS
                                       PRIOR                                                                               CURRENT
                     ORIGINAL      PRINCIPAL                                                 REALIZED      DEFERRED      PRINCIPAL
     CLASS         FACE VALUE        BALANCE      INTEREST     PRINCIPAL          TOTAL        LOSSES      INTEREST        BALANCE
------------------------------------------------------------------------------------------------------------------------------------
<S>            <C>            <C>             <C>           <C>            <C>                   <C>           <C>  <C>
     P1-M           21,501.00       8,340.27          0.00          8.94           8.94          0.00          0.00       8,331.33
     P2-M          350,133.00     270,138.38          0.00      1,316.04       1,316.04          0.00          0.00     268,822.34
     X1-M *    142,084,361.67  87,993,656.77     37,971.09          0.00      37,971.09          0.00          0.00  87,089,847.07
     X2-M *    187,559,494.52 106,461,777.43     19,280.08          0.00      19,280.08          0.00          0.00 105,660,005.58
     Y1             71,698.81      44,361.61        249.55        686.91         936.46          0.00          0.00      43,674.70
     Y2             99,676.65      56,015.50        303.42      1,065.69       1,369.11          0.00          0.00      54,949.81
     Z1        143,556,266.44  89,115,325.71    501,273.71    904,456.73   1,405,730.44          0.00          0.00  88,210,868.98
     Z2        199,253,620.42 115,361,534.52    624,874.97    844,932.23   1,469,807.21          0.00          0.00 114,516,602.29
     R-I                50.00           0.00          0.00          0.00           0.00          0.00          0.00           0.00

------------------------------------------------------------------------------------------------------------------------------------
TOTALS         343,352,946.32 204,855,715.99  1,183,952.82  1,752,466.55   2,936,419.37          0.00          0.00 203,103,249.45
------------------------------------------------------------------------------------------------------------------------------------
  *Notional Class Balance
</TABLE>


<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
                            FACTOR INFORMATION PER $1000 OF ORIGINAL FACE                                     PASS-THROUGH
                                       PRIOR                                                  CURRENT            RATES
                                   PRINCIPAL                                                PRINCIPAL
     CLASS          CUSIP            BALANCE      INTEREST     PRINCIPAL          TOTAL       BALANCE       CURRENT           NEXT
------------------------------------------------------------------------------------------------------------------------------------
<S>             <C>                 <C>           <C>           <C>            <C>           <C>          <C>            <C>
     P1-M                         387.901493      0.000000      0.415795       0.415795    387.485698     0.000000%      0.000000%
     P2-M                         771.530761      0.000000      3.758686       3.758686    767.772075     0.000000%      0.000000%
     X1-M *                       619.305712      0.267243      0.000000       0.267243    612.944634     0.517825%      0.517825%
     X2-M *                       567.616039      0.102794      0.000000       0.102794    563.341279     0.217318%      0.217318%
     Y1                           618.721684      3.480532      9.580493      13.061025    609.141190     6.750000%      6.750000%
     Y2                           561.972145      3.044043     10.691473      13.735516    551.280674     6.500000%      6.500000%
     Z1                           620.769319      3.491827      6.300364       9.792191    614.468955     6.750000%      6.750000%
     Z2                           578.968323      3.136078      4.240486       7.376565    574.727837     6.500000%      6.500000%
     R-I        055240DQ5           0.000000      0.000000      0.000000       0.000000      0.000000     6.750000%      6.750000%


------------------------------------------------------------------------------------------------------------------------------------
SELLER:                                    Bank of America                      ADMINISTRATOR:                Alan T Sueda
SERVICER:                                  Bank of America                                                   Deutsche Bank
LEAD UNDERWRITER:                    Donaldson, Lufkin & Jenrette                                       1761 E. St. Andrew Place
RECORD DATE:                               January 31, 2001                                               Santa Ana, CA 92705
DISTRIBUTION DATE:                        February 26, 2001                          FACTOR INFORMATION:     (800) 735-7777
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
                                    Page 1 of 5 (C) COPYRIGHT 2001 Deutsche Bank


<PAGE>


                          BA MORTGAGE SECURITIES, INC.
                       MORTGAGE PASS-THROUGH CERTIFICATES
                                  SERIES 1998-1

                         STATEMENT TO CERTIFICATEHOLDERS

 Statements are available online at http://www-apps.gis.deutsche-bank.com/invr.
    Statement posting begins 7:00 PM Eastern time the business day prior to
                                 distribution.

<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
                                                     DISTRIBUTIONS IN DOLLARS
                                       PRIOR                                                                               CURRENT
                     ORIGINAL      PRINCIPAL                                                 REALIZED      DEFERRED      PRINCIPAL
     CLASS         FACE VALUE        BALANCE      INTEREST     PRINCIPAL          TOTAL        LOSSES      INTEREST        BALANCE
------------------------------------------------------------------------------------------------------------------------------------
<S>            <C>            <C>             <C>           <C>            <C>                   <C>           <C>  <C>
     IA-1       96,101,504.00  41,748,966.80    234,837.94    901,150.90   1,135,988.84          0.00          0.00  40,847,815.90
     IA-2        5,000,000.00   5,000,000.00     28,125.00          0.00      28,125.00          0.00          0.00   5,000,000.00
     IA-3        9,500,000.00   9,500,000.00     53,437.50          0.00      53,437.50          0.00          0.00   9,500,000.00
     IA-4       14,250,000.00  14,250,000.00     80,156.25          0.00      80,156.25          0.00          0.00  14,250,000.00
     IA-5        4,887,000.00   4,887,000.00     27,489.38          0.00      27,489.38          0.00          0.00   4,887,000.00
     IA-6        9,939,000.00   9,939,000.00     55,906.88          0.00      55,906.88          0.00          0.00   9,939,000.00
     I-X *      11,983,709.00   6,750,416.87     37,971.10          0.00      37,971.10          0.00          0.00   6,688,935.24
     I-PO           21,501.00       8,340.27          0.00          8.94           8.94          0.00          0.00       8,331.33
     IIA-1     121,111,453.00  69,080,016.59    374,183.42    514,505.11     888,688.53          0.00          0.00  68,565,511.48
     IIA-2       1,000,000.00     405,135.19      2,194.48      5,005.17       7,199.65          0.00          0.00     400,130.02
     IIA-3       8,262,000.00   8,262,000.00     44,752.50          0.00      44,752.50          0.00          0.00   8,262,000.00
     IIA-4      14,913,749.00  13,149,152.33     71,224.58     60,928.49     132,153.07          0.00          0.00  13,088,223.84
     IIA-5      46,447,250.00  19,679,136.83    106,595.32    243,122.54     349,717.86          0.00          0.00  19,436,014.29
     IIA-6       2,127,000.00           0.00          0.00          0.00           0.00          0.00          0.00           0.00
     II-X *      7,513,508.12   3,559,398.48     19,280.08          0.00      19,280.08          0.00          0.00   3,538,922.75
     II-PO         350,133.00     270,138.38          0.00      1,316.04       1,316.04          0.00          0.00     268,822.34

------------------------------------------------------------------------------------------------------------------------------------
TOTALS         333,910,590.00 196,178,886.39  1,136,154.43  1,726,037.20   2,862,191.63          0.00          0.00 194,452,849.20
------------------------------------------------------------------------------------------------------------------------------------
*Notional Class Balance
</TABLE>


<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
                            FACTOR INFORMATION PER $1000 OF ORIGINAL FACE                                     PASS-THROUGH
                                       PRIOR                                                  CURRENT            RATES
                                   PRINCIPAL                                                PRINCIPAL
     CLASS          CUSIP            BALANCE      INTEREST     PRINCIPAL          TOTAL       BALANCE       CURRENT           NEXT
------------------------------------------------------------------------------------------------------------------------------------

<S>             <C>             <C>               <C>           <C>           <C>        <C>              <C>            <C>
     IA-1       055240CT0         434.425738      2.443645      9.377074      11.820719    425.048664     6.750000%      6.750000%
     IA-2       055240CU7       1,000.000000      5.625000      0.000000       5.625000  1,000.000000     6.750000%      6.750000%
     IA-3       055240CV5       1,000.000000      5.625000      0.000000       5.625000  1,000.000000     6.750000%      6.750000%
     IA-4       055240CW3       1,000.000000      5.625000      0.000000       5.625000  1,000.000000     6.750000%      6.750000%
     IA-5       055240CX1       1,000.000000      5.625001      0.000000       5.625001  1,000.000000     6.750000%      6.750000%
     IA-6       055240CY9       1,000.000000      5.625001      0.000000       5.625001  1,000.000000     6.750000%      6.750000%
     I-X *      055240DF9         563.299465      5.625001      0.000000       5.625001    558.169031     6.750000%      0.000000%
     I-PO       055240DH5         387.901493      0.000000      0.415795       0.415795    387.485698     0.000000%      6.500000%
     IIA-1      055240CZ6         570.383848      3.089579      4.248195       7.337775    566.135653     6.500000%      6.500000%
     IIA-2      055240DA0         405.135190      2.194480      5.005170       7.199650    400.130020     6.500000%      6.500000%
     IIA-3      055240DB8       1,000.000000      5.416667      0.000000       5.416667  1,000.000000     6.500000%      6.500000%
     IIA-4      055240DC6         881.679873      4.775766      4.085391       8.861157    877.594483     6.500000%      6.500000%
     IIA-5      055240DD4         423.687879      2.294976      5.234380       7.529356    418.453499     6.500000%      6.500000%
     IIA-6      055240DE2           0.000000      0.000000      0.000000       0.000000      0.000000     6.500000%      6.500000%
     II-X *     055240DG7         473.733231      2.566056      0.000000       2.566056    471.008043     6.500000%      0.000000%
     II-PO      055240DU6         771.530761      0.000000      3.758686       3.758686    767.772075     0.000000%      0.000000%


------------------------------------------------------------------------------------------------------------------------------------
SELLER:                                    Bank of America                      ADMINISTRATOR:                Alan T Sueda
SERVICER:                                  Bank of America                                                   Deutsche Bank
LEAD UNDERWRITER:                    Donaldson, Lufkin & Jenrette                                       1761 E. St. Andrew Place
RECORD DATE:                               January 31, 2001                                               Santa Ana, CA 92705
DISTRIBUTION DATE:                        February 26, 2001                          FACTOR INFORMATION:     (800) 735-7777
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>

                                    Page 2 of 5 (C) COPYRIGHT 2001 Deutsche Bank


<PAGE>


                          BA MORTGAGE SECURITIES, INC.
                       MORTGAGE PASS-THROUGH CERTIFICATES
                                  SERIES 1998-1

                         STATEMENT TO CERTIFICATEHOLDERS

 Statements are available online at http://www-apps.gis.deutsche-bank.com/invr.
    Statement posting begins 7:00 PM Eastern time the business day prior to
                                 distribution.

<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
                                                     DISTRIBUTIONS IN DOLLARS
                                       PRIOR                                                                               CURRENT
                     ORIGINAL      PRINCIPAL                                                 REALIZED      DEFERRED      PRINCIPAL
     CLASS         FACE VALUE        BALANCE      INTEREST     PRINCIPAL          TOTAL        LOSSES      INTEREST        BALANCE
------------------------------------------------------------------------------------------------------------------------------------
<S>              <C>            <C>              <C>           <C>            <C>                <C>           <C>    <C>
     M           3,776,882.00   3,470,731.38     19,119.35     10,571.74      29,691.09          0.00          0.00   3,460,159.64
     B-1         2,231,794.00   2,050,886.77     11,297.80      6,246.94      17,544.74          0.00          0.00   2,044,639.83
     B-2         1,201,735.00   1,104,323.48      6,083.43      3,363.73       9,447.16          0.00          0.00   1,100,959.75
     B-3         1,030,060.00     946,564.25      5,214.38      2,883.20       8,097.58          0.00          0.00     943,681.05
     B-4           515,029.00     473,281.21      2,607.18      1,441.60       4,048.78          0.00          0.00     471,839.61
     B-5           686,706.32     631,042.51      3,476.25      1,922.14       5,398.39          0.00          0.00     629,120.37
     R-II               50.00           0.00          0.00          0.00           0.00          0.00          0.00           0.00



------------------------------------------------------------------------------------------------------------------------------------
TOTALS           9,442,256.32   8,676,829.60     47,798.39     26,429.35      74,227.74          0.00          0.00   8,650,400.25
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>


<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
                            FACTOR INFORMATION PER $1000 OF ORIGINAL FACE                                     PASS-THROUGH
                                       PRIOR                                                  CURRENT            RATES
                                   PRINCIPAL                                                PRINCIPAL
     CLASS          CUSIP            BALANCE      INTEREST     PRINCIPAL          TOTAL       BALANCE       CURRENT           NEXT
------------------------------------------------------------------------------------------------------------------------------------
<S>             <C>               <C>             <C>           <C>            <C>         <C>            <C>            <C>
     M          055240DJ1         918.940909      5.062205      2.799065       7.861270    916.141844     6.610487%      6.610710%
     B-1        055240DK8         918.940892      5.062206      2.799067       7.861272    916.141826     6.610487%      6.610710%
     B-2        055240DL6         918.940931      5.062206      2.799061       7.861267    916.141870     6.610487%      6.610710%
     B-3        055240DM4         918.940887      5.062210      2.799060       7.861270    916.141827     6.610487%      6.610710%
     B-4        055240DN2         918.940895      5.062200      2.799066       7.861266    916.141829     6.610487%      6.610710%
     B-5        055240DP7         918.940880      5.062208      2.799071       7.861279    916.141809     6.610487%      6.610710%
     R-II       055240DR3           0.000000      0.000000      0.000000       0.000000      0.000000     6.750000%      6.750000%


------------------------------------------------------------------------------------------------------------------------------------
SELLER:                                    Bank of America                      ADMINISTRATOR:                Alan T Sueda
SERVICER:                                  Bank of America                                                   Deutsche Bank
LEAD UNDERWRITER:                    Donaldson, Lufkin & Jenrette                                       1761 E. St. Andrew Place
RECORD DATE:                               January 31, 2001                                               Santa Ana, CA 92705
DISTRIBUTION DATE:                        February 26, 2001                     FACTOR INFORMATION:          (800) 735-7777
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
                                    Page 3 of 5 (C) COPYRIGHT 2001 Deutsche Bank


<PAGE>


                          BA MORTGAGE SECURITIES, INC.
                       MORTGAGE PASS-THROUGH CERTIFICATES
                                  SERIES 1998-1

                         STATEMENT TO CERTIFICATEHOLDERS
<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
Distribution Date:            February 26, 2001
------------------------------------------------------------------------------------------------------------------------------------


MORTGAGE POOL INFORMATION:                                                  GROUP I                     GROUP II
--------------------------                                                  -------                     --------
<S>                                                                       <C>                         <C>
                BEGINNING BALANCE OF POOL                                 89,168,027.57               115,687,688.70
                LESS:         SCHEDULED PRINCIPAL                            (92,842.63)                (536,050.29)
                              PRINCIPAL PREPAYMENTS                         (812,309.95)                (311,263.68)
                              REPURCHASES                                          0.00                        0.00
                              LIQUIDATIONS                                         0.00                        0.00
                              OTHER UNSCHEDULED PRINCIPAL                          0.00                        0.00
                                                                          -------------               --------------
                ENDING BALANCE OF POOL                                    88,262,874.99               114,840,374.73
                                                                          =============               ==============

                BEGINNING NUMBER OF LOANS IN POOL                                   285                         380
                ENDING NUMBER OF LOANS IN POOL                                      283                         379

                WEIGHTED AVERAGE REMAINING TERM TO MATURITY                         313                         140
                WEIGHTED AVERAGE NET CONTRACT RATE                            7.510374%                   7.069137%

                CURRENT REALIZED LOSSES ON THE POOL                                0.00                        0.00
                CUMULATIVE REALIZED LOSSES ON THE POOL                             0.00                        0.00

                BEGINNING POOL BALANCE OF PREMIUM LOANS                   87,993,656.77               106,461,777.43
                STRIPPED INTEREST RATE                                        0.517825%                   0.217318%
</TABLE>


<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
DELINQUENT, BANKRUPTCY,                                                                     LOANS         LOANS         LOANS
FORECLOSURE, AND REO                           30 TO 59      60 TO 89       90 PLUS          IN            IN             IN
LOAN INFORMATION                                 DAYS          DAYS           DAYS       BANKRUPTCY    FORECLOSURE       REO
------------------------------------------------------------------------------------------------------------------------------------

<S>                                                <C>           <C>            <C>           <C>           <C>            <C>
GROUP I         PRINCIPAL BALANCE                     0.00          0.00           0.00          0.00          0.00           0.00
                     PERCENTAGE OF GROUP BAL.      0.0000%       0.0000%        0.0000%       0.0000%       0.0000%        0.0000%
                NUMBER OF LOANS                          0             0              0             0             0              0
                     PERCENTAGE OF LOANS           0.0000%       0.0000%        0.0000%       0.0000%       0.0000%        0.0000%
GROUP II        PRINCIPAL BALANCE                     0.00          0.00           0.00          0.00          0.00           0.00
                     PERCENTAGE OF GROUP BAL.      0.0000%       0.0000%        0.0000%       0.0000%       0.0000%        0.0000%
                NUMBER OF LOANS                          0             0              0             0             0              0
                     PERCENTAGE OF LOANS           0.0000%       0.0000%        0.0000%       0.0000%       0.0000%        0.0000%
------------------------------------------------------------------------------------------------------------------------------------
                GROUP I BOOK VALUE OF REO PROPERTIES                                                             NA
                GROUP II BOOK VALUE OF REO PROPERTIES                                                            NA
</TABLE>


<TABLE>
<CAPTION>
SERVICING INFORMATION:                                                      GROUP I                     GROUP II
----------------------                                                      -------                     --------

<S>                                                                           <C>                         <C>
                SERVICING FEES ACCRUED DURING THE CURRENT DUE PERIOD          18,576.67                   37,051.66
                PLUS:         ADDITIONAL SERVICING COMPENSATION                    0.00                        0.00
                LESS:         AMTS. TO COVER PREPAYMENT INT. SHORTFALL        (3,165.41)                    (732.00)
                              DELINQUENT SERVICING FEES                       (1,478.26)                  (2,226.69)
                                                                          -------------               --------------
                SERVICING FEES COLLECTED FOR THE CURRENT DUE PERIOD           13,933.00                   34,092.97
                                                                          =============               ==============

                ADVANCED PRINCIPAL                                             7,016.08                   28,374.67
                ADVANCED INTEREST                                             42,430.53                   36,013.39
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>

                                    Page 4 of 5 (C) COPYRIGHT 2001 Deutsche Bank


<PAGE>


                          BA MORTGAGE SECURITIES, INC.
                       MORTGAGE PASS-THROUGH CERTIFICATES
                                  SERIES 1998-1

                         STATEMENT TO CERTIFICATEHOLDERS
<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
Distribution Date:            February 26, 2001
------------------------------------------------------------------------------------------------------------------------------------

                                                 OTHER                                   CUMULATIVE
                                PREPAYMENT    UNSCHEDULED                 CERTIFICATE      UNPAID                     CUMULATIVE
                                PRINCIPAL      PRINCIPAL                    INTEREST      INTEREST                     REALIZED
     CLASS                     DISTRIBUTED    DISTRIBUTED                  SHORTFALL      SHORTFALL                     LOSSES
------------------------------------------------------------------------------------------------------------------------------------
<S>                               <C>                 <C>                          <C>           <C>                          <C>
       CLASS IA-1                 812,301.89          0.00                         0.00          0.00                         0.00
       CLASS IA-2                       0.00          0.00                         0.00          0.00                         0.00
       CLASS IA-3                       0.00          0.00                         0.00          0.00                         0.00
       CLASS IA-4                       0.00          0.00                         0.00          0.00                         0.00
       CLASS IA-5                       0.00          0.00                         0.00          0.00                         0.00
       CLASS IA-6                       0.00          0.00                         0.00          0.00                         0.00
       CLASS I-X                        0.00          0.00                         0.00          0.00                         0.00
       CLASS I-PO                       8.06          0.00                         0.00          0.00                         0.00
       CLASS IIA-1                194,146.14          0.00                         0.00          0.00                         0.00
       CLASS IIA-2                  1,888.68          0.00                         0.00          0.00                         0.00
       CLASS IIA-3                      0.00          0.00                         0.00          0.00                         0.00
       CLASS IIA-4                 22,991.09          0.00                         0.00          0.00                         0.00
       CLASS IIA-5                 91,741.17          0.00                         0.00          0.00                         0.00
       CLASS IIA-6                      0.00          0.00                         0.00          0.00                         0.00
       CLASS II-X                       0.00          0.00                         0.00          0.00                         0.00
       CLASS II-PO                    496.60          0.00                         0.00          0.00                         0.00
       CLASS M                          0.00          0.00                         0.00          0.00                         0.00
       CLASS B-1                        0.00          0.00                         0.00          0.00                         0.00
       CLASS B-2                        0.00          0.00                         0.00          0.00                         0.00
       CLASS B-3                        0.00          0.00                         0.00          0.00                         0.00
       CLASS B-4                        0.00          0.00                         0.00          0.00                         0.00
       CLASS B-5                        0.00          0.00                         0.00          0.00                         0.00
------------------------------------------------------------------------------------------------------------------------------------
    TOTALS                      1,123,573.63          0.00                         0.00          0.00                         0.00
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>

<TABLE>
<CAPTION>

<S>                                                                                                    <C>
                OTHER REPORTING ITEMS:

                GROUP I PERCENTAGE                                                                           95.70%
                GROUP I PREPAYMENT PERCENTAGE                                                               100.00%
                GROUP II PERCENTAGE                                                                          95.80%
                GROUP II PREPAYMENT PERCENTAGE                                                              100.00%

                SUBORDINATE PRINCIPAL DISTRIBUTION AMOUNT                                                 26,429.35
                HAS THE CREDIT SUPPORT DEPLETION DATE OCCURRED                                                   No

                BANKRUPTCY AMOUNT                                                                        100,000.00
                FRAUD LOSS AMOUNT                                                                        119,926.36
                SPECIAL HAZARD AMOUNT                                                                  4,500,664.47
                EXTRAORDINARY LOSSES FOR THE PRIOR PERIOD                                                      0.00

                GROUP I EXTRAORDINARY LOSSES                                                                   0.00
                GROUP II EXTRAORDINARY LOSSES                                                                  0.00

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

                                    Page 5 of 5 (C) COPYRIGHT 2001 Deutsche Bank


<PAGE>

                          BA MORTGAGE SECURITIES, INC.
                       MORTGAGE PASS-THROUGH CERTIFICATES
                                  SERIES 1998-1
                         STATEMENT TO CERTIFICATEHOLDERS

 Statements are available online at http://www-apps.gis.deutsche-bank.com/invr.
    Statement posting begins 7:00 PM Eastern time the business day prior to
                                 distribution.

<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
                                                     DISTRIBUTIONS IN DOLLARS
                                       PRIOR                                                                               CURRENT
                     ORIGINAL      PRINCIPAL                                                 REALIZED      DEFERRED      PRINCIPAL
     CLASS         FACE VALUE        BALANCE      INTEREST     PRINCIPAL          TOTAL        LOSSES      INTEREST        BALANCE
------------------------------------------------------------------------------------------------------------------------------------
<S>            <C>            <C>             <C>           <C>            <C>                   <C>           <C>  <C>
     P1-M           21,501.00       8,331.33          0.00          8.87           8.87          0.00          0.00       8,322.46
     P2-M          350,133.00     268,822.34          0.00      1,398.27       1,398.27          0.00          0.00     267,424.07
     X1-M *    142,084,361.67  87,089,847.07     37,625.26          0.00      37,625.26          0.00          0.00  86,143,717.03
     X2-M *    187,559,494.52 105,660,005.58     19,169.16          0.00      19,169.16          0.00          0.00 105,059,476.69
     Y1             71,698.81      43,674.70        245.70        494.82         740.51          0.00          0.00      43,179.88
     Y2             99,676.65      54,949.81        297.64        821.09       1,118.73          0.00          0.00      54,128.72
     Z1        143,556,266.44  88,210,868.98    496,186.14    946,894.96   1,443,081.10          0.00          0.00  87,263,974.02
     Z2        199,253,620.42 114,516,602.29    620,298.25    647,902.89   1,268,201.15          0.00          0.00 113,868,699.40
     R-I                50.00           0.00          0.00          0.00           0.00          0.00          0.00           0.00


------------------------------------------------------------------------------------------------------------------------------------
TOTALS         343,352,946.32 203,103,249.45  1,173,822.15  1,597,520.90   2,771,343.05          0.00          0.00 201,505,728.55
------------------------------------------------------------------------------------------------------------------------------------
*Notional Class Balance
</TABLE>


<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
                            FACTOR INFORMATION PER $1000 OF ORIGINAL FACE                                     PASS-THROUGH
                                       PRIOR                                                  CURRENT            RATES
                                   PRINCIPAL                                                PRINCIPAL
     CLASS          CUSIP            BALANCE      INTEREST     PRINCIPAL          TOTAL       BALANCE       CURRENT           NEXT
------------------------------------------------------------------------------------------------------------------------------------
<S>             <C>               <C>             <C>           <C>           <C>          <C>            <C>            <C>
     P1-M                         387.485698      0.000000      0.412539       0.412539    387.073159     0.000000%      0.000000%
     P2-M                         767.772075      0.000000      3.993540       3.993540    763.778536     0.000000%      0.000000%
     X1-M *                       612.944634      0.264809      0.000000       0.264809    606.285703     0.518434%      0.518434%
     X2-M *                       563.341279      0.102203      0.000000       0.102203    560.139474     0.217708%      0.217708%
     Y1                           609.141190      3.426765      6.901341      10.328106    602.239821     6.750000%      6.750000%
     Y2                           551.280674      2.986055      8.237576      11.223631    543.043138     6.500000%      6.500000%
     Z1                           614.468955      3.456388      6.595985      10.052373    607.872970     6.750000%      6.750000%
     Z2                           574.727837      3.113109      3.251649       6.364758    571.476188     6.500000%      6.500000%
     R-I        055240DQ5           0.000000      0.000000      0.000000       0.000000      0.000000     6.750000%      6.750000%



------------------------------------------------------------------------------------------------------------------------------------
SELLER:                                    Bank of America                      ADMINISTRATOR:                Eiko Akiyama
SERVICER:                                  Bank of America                                                   Deutsche Bank
LEAD UNDERWRITER:                    Donaldson, Lufkin & Jenrette                                       1761 E. St. Andrew Place
RECORD DATE:                              February 28, 2001                                               Santa Ana, CA 92705
DISTRIBUTION DATE:                          March 26, 2001                      FACTOR INFORMATION:          (800) 735-7777
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>

                                    Page 1 of 5 (C) COPYRIGHT 2001 Deutsche Bank


<PAGE>


                          BA MORTGAGE SECURITIES, INC.
                       MORTGAGE PASS-THROUGH CERTIFICATES
                                  SERIES 1998-1

                         STATEMENT TO CERTIFICATEHOLDERS



 Statements are available online at http://www-apps.gis.deutsche-bank.com/invr.
    Statement posting begins 7:00 PM Eastern time the business day prior to
                                 distribution.

<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
                                                     DISTRIBUTIONS IN DOLLARS
                                       PRIOR                                                                               CURRENT
                     ORIGINAL      PRINCIPAL                                                 REALIZED      DEFERRED      PRINCIPAL
     CLASS         FACE VALUE        BALANCE      INTEREST     PRINCIPAL          TOTAL        LOSSES      INTEREST        BALANCE
------------------------------------------------------------------------------------------------------------------------------------
<S>            <C>            <C>             <C>           <C>            <C>                   <C>           <C>  <C>
     IA-1       96,101,504.00  40,847,815.90    229,768.96    943,365.09   1,173,134.05          0.00          0.00  39,904,450.81
     IA-2        5,000,000.00   5,000,000.00     28,125.00          0.00      28,125.00          0.00          0.00   5,000,000.00
     IA-3        9,500,000.00   9,500,000.00     53,437.50          0.00      53,437.50          0.00          0.00   9,500,000.00
     IA-4       14,250,000.00  14,250,000.00     80,156.25          0.00      80,156.25          0.00          0.00  14,250,000.00
     IA-5        4,887,000.00   4,887,000.00     27,489.38          0.00      27,489.38          0.00          0.00   4,887,000.00
     IA-6        9,939,000.00   9,939,000.00     55,906.88          0.00      55,906.88          0.00          0.00   9,939,000.00
     I-X *      11,983,709.00   6,688,935.24     37,625.26          0.00      37,625.26          0.00          0.00   6,608,424.99
     I-PO           21,501.00       8,331.33          0.00          8.87           8.87          0.00          0.00       8,322.46
     IIA-1     121,111,453.00  68,565,511.48    371,396.52    391,123.33     762,519.85          0.00          0.00  68,174,388.15
     IIA-2       1,000,000.00     400,130.02      2,167.37      3,498.03       5,665.40          0.00          0.00     396,631.99
     IIA-3       8,262,000.00   8,262,000.00     44,752.50          0.00      44,752.50          0.00          0.00   8,262,000.00
     IIA-4      14,913,749.00  13,088,223.84     70,894.55     61,530.20     132,424.75          0.00          0.00  13,026,693.64
     IIA-5      46,447,250.00  19,436,014.29    105,278.41    169,914.22     275,192.63          0.00          0.00  19,266,100.07
     IIA-6       2,127,000.00           0.00          0.00          0.00           0.00          0.00          0.00           0.00
     II-X *      7,513,508.12   3,538,922.75     19,169.16          0.00      19,169.16          0.00          0.00   3,517,671.35
     II-PO         350,133.00     268,822.34          0.00      1,398.27       1,398.27          0.00          0.00     267,424.07


------------------------------------------------------------------------------------------------------------------------------------
TOTALS         333,910,590.00 194,452,849.20  1,126,167.74  1,570,838.01   2,697,005.75          0.00          0.00 192,882,011.19
------------------------------------------------------------------------------------------------------------------------------------
*Notional Class Balance
</TABLE>


<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
                            FACTOR INFORMATION PER $1000 OF ORIGINAL FACE                                     PASS-THROUGH
                                       PRIOR                                                  CURRENT            RATES
                                   PRINCIPAL                                                PRINCIPAL
     CLASS          CUSIP            BALANCE      INTEREST     PRINCIPAL          TOTAL       BALANCE       CURRENT           NEXT
------------------------------------------------------------------------------------------------------------------------------------
<S>             <C>             <C>             <C>             <C>           <C>        <C>              <C>            <C>
     IA-1       055240CT0         425.048664      2.390899      9.816341      12.207239    415.232324     6.750000%      6.750000%
     IA-2       055240CU7       1,000.000000      5.625000      0.000000       5.625000  1,000.000000     6.750000%      6.750000%
     IA-3       055240CV5       1,000.000000      5.625000      0.000000       5.625000  1,000.000000     6.750000%      6.750000%
     IA-4       055240CW3       1,000.000000      5.625000      0.000000       5.625000  1,000.000000     6.750000%      6.750000%
     IA-5       055240CX1       1,000.000000      5.625001      0.000000       5.625001  1,000.000000     6.750000%      6.750000%
     IA-6       055240CY9       1,000.000000      5.625001      0.000000       5.625001  1,000.000000     6.750000%      6.750000%
     I-X *      055240DF9         558.169031      5.625000      0.000000       5.625000    551.450722     6.750000%      0.000000%
     I-PO       055240DH5         387.485698      0.000000      0.412539       0.412539    387.073159     0.000000%      6.500000%
     IIA-1      055240CZ6         566.135653      3.066568      3.229450       6.296018    562.906203     6.500000%      6.500000%
     IIA-2      055240DA0         400.130020      2.167370      3.498030       5.665400    396.631990     6.500000%      6.500000%
     IIA-3      055240DB8       1,000.000000      5.416667      0.000000       5.416667  1,000.000000     6.500000%      6.500000%
     IIA-4      055240DC6         877.594483      4.753637      4.125737       8.879374    873.468746     6.500000%      6.500000%
     IIA-5      055240DD4         418.453499      2.266623      3.658219       5.924842    414.795280     6.500000%      6.500000%
     IIA-6      055240DE2           0.000000      0.000000      0.000000       0.000000      0.000000     6.500000%      6.500000%
     II-X *     055240DG7         471.008043      2.551293      0.000000       2.551293    468.179617     6.500000%      0.000000%
     II-PO      055240DU6         767.772075      0.000000      3.993540       3.993540    763.778536     0.000000%      0.000000%



------------------------------------------------------------------------------------------------------------------------------------
SELLER:                                    Bank of America                      ADMINISTRATOR:                Eiko Akiyama
SERVICER:                                  Bank of America                                                   Deutsche Bank
LEAD UNDERWRITER:                    Donaldson, Lufkin & Jenrette                                       1761 E. St. Andrew Place
RECORD DATE:                              February 28, 2001                                               Santa Ana, CA 92705
DISTRIBUTION DATE:                          March 26, 2001                      FACTOR INFORMATION:          (800) 735-7777
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
                                    Page 2 of 5 (C) COPYRIGHT 2001 Deutsche Bank


<PAGE>


                          BA MORTGAGE SECURITIES, INC.
                       MORTGAGE PASS-THROUGH CERTIFICATES
                                  SERIES 1998-1

                         STATEMENT TO CERTIFICATEHOLDERS

 Statements are available online at http://www-apps.gis.deutsche-bank.com/invr.
    Statement posting begins 7:00 PM Eastern time the business day prior to
                                 distribution.

<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
                                                     DISTRIBUTIONS IN DOLLARS
                                       PRIOR                                                                               CURRENT
                     ORIGINAL      PRINCIPAL                                                 REALIZED      DEFERRED      PRINCIPAL
     CLASS         FACE VALUE        BALANCE      INTEREST     PRINCIPAL          TOTAL        LOSSES      INTEREST        BALANCE
------------------------------------------------------------------------------------------------------------------------------------
<S>              <C>            <C>              <C>           <C>            <C>                <C>           <C>    <C>
     M           3,776,882.00   3,460,159.64     19,061.76     10,673.15      29,734.91          0.00          0.00   3,449,486.49
     B-1         2,231,794.00   2,044,639.83     11,263.77      6,306.86      17,570.63          0.00          0.00   2,038,332.97
     B-2         1,201,735.00   1,100,959.75      6,065.10      3,396.00       9,461.10          0.00          0.00   1,097,563.75
     B-3         1,030,060.00     943,681.05      5,198.67      2,910.86       8,109.53          0.00          0.00     940,770.19
     B-4           515,029.00     471,839.61      2,599.33      1,455.43       4,054.76          0.00          0.00     470,384.18
     B-5           686,706.32     629,120.37      3,465.78      1,940.59       5,406.37          0.00          0.00     627,179.78
     R-II               50.00           0.00          0.00          0.00           0.00          0.00          0.00           0.00



------------------------------------------------------------------------------------------------------------------------------------
TOTALS           9,442,256.32   8,650,400.25     47,654.41     26,682.89      74,337.30          0.00          0.00   8,623,717.36
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>


<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
                            FACTOR INFORMATION PER $1000 OF ORIGINAL FACE                                     PASS-THROUGH
                                       PRIOR                                                  CURRENT            RATES
                                   PRINCIPAL                                                PRINCIPAL
     CLASS          CUSIP            BALANCE      INTEREST     PRINCIPAL          TOTAL       BALANCE       CURRENT           NEXT
------------------------------------------------------------------------------------------------------------------------------------
<S>             <C>               <C>             <C>           <C>            <C>         <C>            <C>            <C>
     M          055240DJ1         916.141844      5.046957      2.825916       7.872872    913.315928     6.610710%      6.610935%
     B-1        055240DK8         916.141826      5.046958      2.825915       7.872873    913.315911     6.610710%      6.610935%
     B-2        055240DL6         916.141870      5.046953      2.825914       7.872867    913.315956     6.610710%      6.610935%
     B-3        055240DM4         916.141827      5.046958      2.825913       7.872871    913.315914     6.610710%      6.610935%
     B-4        055240DN2         916.141829      5.046959      2.825919       7.872877    913.315910     6.610710%      6.610935%
     B-5        055240DP7         916.141809      5.046961      2.825939       7.872900    913.315870     6.610710%      6.610935%
     R-II       055240DR3           0.000000      0.000000      0.000000       0.000000      0.000000     6.750000%      6.750000%


------------------------------------------------------------------------------------------------------------------------------------
SELLER:                                    Bank of America                      ADMINISTRATOR:                Eiko Akiyama
SERVICER:                                  Bank of America                                                   Deutsche Bank
LEAD UNDERWRITER:                    Donaldson, Lufkin & Jenrette                                       1761 E. St. Andrew Place
RECORD DATE:                              February 28, 2001                                               Santa Ana, CA 92705
DISTRIBUTION DATE:                          March 26, 2001                      FACTOR INFORMATION:          (800) 735-7777
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
                                    Page 3 of 5 (C) COPYRIGHT 2001 Deutsche Bank


<PAGE>


                          BA MORTGAGE SECURITIES, INC.
                       MORTGAGE PASS-THROUGH CERTIFICATES
                                  SERIES 1998-1

                         STATEMENT TO CERTIFICATEHOLDERS

<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
Distribution Date:            March 26, 2001
------------------------------------------------------------------------------------------------------------------------------------


MORTGAGE POOL INFORMATION:                                                  GROUP I                     GROUP II
--------------------------                                                  -------                     --------
<S>                                                                       <C>                         <C>
                BEGINNING BALANCE OF POOL                                 88,262,874.99               114,840,374.73
                LESS:         SCHEDULED PRINCIPAL                            (92,732.30)                (539,876.01)
                              PRINCIPAL PREPAYMENTS                         (854,666.36)                (110,246.23)
                              REPURCHASES                                          0.00                        0.00
                              LIQUIDATIONS                                         0.00                        0.00
                              OTHER UNSCHEDULED PRINCIPAL                          0.00                        0.00
                                                                          -------------               --------------
                ENDING BALANCE OF POOL                                    87,315,476.33               114,190,252.49
                                                                          =============               ==============

                BEGINNING NUMBER OF LOANS IN POOL                                   283                         379
                ENDING NUMBER OF LOANS IN POOL                                      280                         379

                WEIGHTED AVERAGE REMAINING TERM TO MATURITY                         312                         139
                WEIGHTED AVERAGE NET CONTRACT RATE                            7.510906%                   7.069241%

                CURRENT REALIZED LOSSES ON THE POOL                                0.00                        0.00
                CUMULATIVE REALIZED LOSSES ON THE POOL                             0.00                        0.00

                BEGINNING POOL BALANCE OF PREMIUM LOANS                   87,089,847.07               105,660,005.58
                STRIPPED INTEREST RATE                                        0.518434%                   0.217708%
</TABLE>


<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
DELINQUENT, BANKRUPTCY,                                                                     LOANS         LOANS         LOANS
FORECLOSURE, AND REO                           30 TO 59      60 TO 89       90 PLUS          IN            IN             IN
LOAN INFORMATION                                 DAYS          DAYS           DAYS       BANKRUPTCY    FORECLOSURE       REO
------------------------------------------------------------------------------------------------------------------------------------
<S>                                             <C>              <C>            <C>        <C>              <C>            <C>
GROUP I         PRINCIPAL BALANCE               604,398.21          0.00           0.00    250,792.33          0.00           0.00
                     PERCENTAGE OF GROUP BAL.      0.2999%       0.0000%        0.0000%       0.1245%       0.0000%        0.0000%
                NUMBER OF LOANS                          2             0              0             1             0              0
                     PERCENTAGE OF LOANS           0.3035%       0.0000%        0.0000%       0.1517%       0.0000%        0.0000%
GROUP II        PRINCIPAL BALANCE                     0.00          0.00           0.00          0.00          0.00           0.00
                     PERCENTAGE OF GROUP BAL.      0.0000%       0.0000%        0.0000%       0.0000%       0.0000%        0.0000%
                NUMBER OF LOANS                          0             0              0             0             0              0
                     PERCENTAGE OF LOANS           0.0000%       0.0000%        0.0000%       0.0000%       0.0000%        0.0000%
------------------------------------------------------------------------------------------------------------------------------------
                GROUP I BOOK VALUE OF REO PROPERTIES                                                             NA
                GROUP II BOOK VALUE OF REO PROPERTIES                                                            NA
</TABLE>


<TABLE>
<CAPTION>
SERVICING INFORMATION:                                                      GROUP I                     GROUP II
----------------------                                                      -------                     --------
<S>                                                                           <C>                         <C>
                SERVICING FEES ACCRUED DURING THE CURRENT DUE PERIOD          18,388.10                   36,763.50
                PLUS:         ADDITIONAL SERVICING COMPENSATION                    0.00                        0.00
                LESS:         AMTS. TO COVER PREPAYMENT INT. SHORTFALL        (3,560.48)                       0.00
                              DELINQUENT SERVICING FEES                         (558.60)                    (530.79)
                                                                          -------------               --------------
                SERVICING FEES COLLECTED FOR THE CURRENT DUE PERIOD           14,269.02                   36,232.71
                                                                          =============               ==============

                ADVANCED PRINCIPAL                                             2,627.92                    6,523.32
                ADVANCED INTEREST                                             16,179.40                    8,212.99
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
                                    Page 4 of 5 (C) COPYRIGHT 2001 Deutsche Bank


<PAGE>


                          BA MORTGAGE SECURITIES, INC.
                       MORTGAGE PASS-THROUGH CERTIFICATES
                                  SERIES 1998-1

                         STATEMENT TO CERTIFICATEHOLDERS

<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
Distribution Date:            March 26, 2001
------------------------------------------------------------------------------------------------------------------------------------
                                                 OTHER                                   CUMULATIVE
                                PREPAYMENT    UNSCHEDULED                 CERTIFICATE      UNPAID                     CUMULATIVE
                                PRINCIPAL      PRINCIPAL                    INTEREST      INTEREST                     REALIZED
     CLASS                     DISTRIBUTED    DISTRIBUTED                  SHORTFALL      SHORTFALL                     LOSSES
------------------------------------------------------------------------------------------------------------------------------------
<S>                               <C>                 <C>                          <C>           <C>                          <C>
       CLASS IA-1                 854,658.32          0.00                         0.00          0.00                         0.00
       CLASS IA-2                       0.00          0.00                         0.00          0.00                         0.00
       CLASS IA-3                       0.00          0.00                         0.00          0.00                         0.00
       CLASS IA-4                       0.00          0.00                         0.00          0.00                         0.00
       CLASS IA-5                       0.00          0.00                         0.00          0.00                         0.00
       CLASS IA-6                       0.00          0.00                         0.00          0.00                         0.00
       CLASS I-X                        0.00          0.00                         0.00          0.00                         0.00
       CLASS I-PO                       8.04          0.00                         0.00          0.00                         0.00
       CLASS IIA-1                 68,720.87          0.00                         0.00          0.00                         0.00
       CLASS IIA-2                    614.61          0.00                         0.00          0.00                         0.00
       CLASS IIA-3                      0.00          0.00                         0.00          0.00                         0.00
       CLASS IIA-4                 10,810.93          0.00                         0.00          0.00                         0.00
       CLASS IIA-5                 29,854.14          0.00                         0.00          0.00                         0.00
       CLASS IIA-6                      0.00          0.00                         0.00          0.00                         0.00
       CLASS II-X                       0.00          0.00                         0.00          0.00                         0.00
       CLASS II-PO                    245.68          0.00                         0.00          0.00                         0.00
       CLASS M                          0.00          0.00                         0.00          0.00                         0.00
       CLASS B-1                        0.00          0.00                         0.00          0.00                         0.00
       CLASS B-2                        0.00          0.00                         0.00          0.00                         0.00
       CLASS B-3                        0.00          0.00                         0.00          0.00                         0.00
       CLASS B-4                        0.00          0.00                         0.00          0.00                         0.00
       CLASS B-5                        0.00          0.00                         0.00          0.00                         0.00
------------------------------------------------------------------------------------------------------------------------------------
    TOTALS                        964,912.59          0.00                         0.00          0.00                         0.00
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>


<TABLE>
<CAPTION>

<S>                                                                                                    <C>
                OTHER REPORTING ITEMS:

                GROUP I PERCENTAGE                                                                           95.66%
                GROUP I PREPAYMENT PERCENTAGE                                                               100.00%
                GROUP II PERCENTAGE                                                                          95.79%
                GROUP II PREPAYMENT PERCENTAGE                                                              100.00%

                SUBORDINATE PRINCIPAL DISTRIBUTION AMOUNT                                                 26,682.89
                HAS THE CREDIT SUPPORT DEPLETION DATE OCCURRED                                                   No

                BANKRUPTCY AMOUNT                                                                        100,000.00
                FRAUD LOSS AMOUNT                                                                        119,926.36
                SPECIAL HAZARD AMOUNT                                                                  4,500,664.47
                EXTRAORDINARY LOSSES FOR THE PRIOR PERIOD                                                      0.00

                GROUP I EXTRAORDINARY LOSSES                                                                   0.00
                GROUP II EXTRAORDINARY LOSSES                                                                  0.00

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

                                    Page 5 of 5 (C) COPYRIGHT 2001 Deutsche Bank


<PAGE>

                          BA MORTGAGE SECURITIES, INC.
                       MORTGAGE PASS-THROUGH CERTIFICATES
                                 SERIES 1998-1

                         STATEMENT TO CERTIFICATEHOLDERS

 Statements are available online at http://www-apps.gis.deutsche-bank.com/invr.
    Statement posting begins 7:00 PM Eastern time the business day prior to
                                 distribution.


<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
                                                    DISTRIBUTIONS IN DOLLARS
                                       PRIOR                                                                              CURRENT
                     ORIGINAL      PRINCIPAL                                                 REALIZED      DEFERRED     PRINCIPAL
     CLASS         FACE VALUE        BALANCE      INTEREST     PRINCIPAL         TOTAL         LOSSES      INTEREST       BALANCE
------------------------------------------------------------------------------------------------------------------------------------
<S>            <C>            <C>             <C>           <C>           <C>                    <C>           <C>  <C>
     P1-M           21,501.00       8,322.46          0.00          9.22          9.22           0.00          0.00       8,313.24
     P2-M          350,133.00     267,424.07          0.00      1,305.21      1,305.21           0.00          0.00     266,118.86
     X1-M *    142,084,361.67  86,143,717.03     37,172.39          0.00     37,172.39           0.00          0.00  86,143,717.03
     X2-M *    187,559,494.52 105,059,476.69     19,054.05          0.00     19,054.05           0.00          0.00 105,059,476.69
     Y1             71,698.81      43,179.88        242.89      1,585.91      1,828.80           0.00          0.00      41,593.97
     Y2             99,676.65      54,128.72        293.20      2,178.26      2,471.46           0.00          0.00      51,950.46
     Z1        143,556,266.44  87,263,974.02    490,859.85  2,058,021.67  2,548,881.52           0.00          0.00  85,205,952.35
     Z2        199,253,620.42 113,868,699.40    616,788.78  2,478,720.18  3,095,508.97           0.00          0.00 111,389,979.22
     R-I                50.00           0.00          0.00          0.00          0.00           0.00          0.00           0.00


------------------------------------------------------------------------------------------------------------------------------------
TOTALS         343,352,946.32 201,505,728.55  1,164,411.16  4,541,820.46  5,706,231.62           0.00          0.00 196,963,908.10
------------------------------------------------------------------------------------------------------------------------------------
  *Notional Class Balance
</TABLE>


<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
                           FACTOR INFORMATION PER $1000 OF ORIGINAL FACE                                    PASS-THROUGH
                                      PRIOR                                                  CURRENT            RATES
                                  PRINCIPAL                                                PRINCIPAL
     CLASS          CUSIP           BALANCE      INTEREST     PRINCIPAL         TOTAL        BALANCE       CURRENT          NEXT
------------------------------------------------------------------------------------------------------------------------------------
<S>             <C>                <C>           <C>           <C>           <C>            <C>          <C>           <C>
     P1-M                        387.073159      0.000000      0.428817      0.428817     386.644342     0.000000%     0.000000%
     P2-M                        763.778536      0.000000      3.727755      3.727755     760.050781     0.000000%     0.000000%
     X1-M *                      606.285703      0.261622      0.000000      0.261622     606.285703     0.517819%     0.517819%
     X2-M *                      560.139474      0.101589      0.000000      0.101589     560.139474     0.217637%     0.217637%
     Y1                          602.239821      3.387643     22.119064     25.506708     580.120766     6.750000%     6.750000%
     Y2                          543.043138      2.941511     21.853303     24.794814     521.189875     6.500000%     6.500000%
     Z1                          607.872970      3.419285     14.335993     17.755279     593.536977     6.750000%     6.750000%
     Z2                          571.476188      3.095496     12.440026     15.535522     559.036162     6.500000%     6.500000%
     R-I        055240DQ5          0.000000      0.000000      0.000000      0.000000       0.000000     6.750000%     6.750000%


------------------------------------------------------------------------------------------------------------------------------------
SELLER:                                    Bank of America                     ADMINISTRATOR:               Eiko Akiyama
SERVICER:                                  Bank of America                                                  Deutsche Bank
LEAD UNDERWRITER:                   Donaldson, Lufkin & Jenrette                                      1761 E. St. Andrew Place
RECORD DATE:                               March 30, 2001                                                Santa Ana, CA 92705
DISTRIBUTION DATE:                         April 25, 2001                       FACTOR INFORMATION:        (800) 735-7777
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
                                    Page 1 of 5 (C) COPYRIGHT 2001 Deutsche Bank


<PAGE>


                          BA MORTGAGE SECURITIES, INC.
                       MORTGAGE PASS-THROUGH CERTIFICATES
                                  SERIES 1998-1

                         STATEMENT TO CERTIFICATEHOLDERS

 Statements are available online at http://www-apps.gis.deutsche-bank.com/invr.
    Statement posting begins 7:00 PM Eastern time the business day prior to
                                 distribution.

<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
                                                    DISTRIBUTIONS IN DOLLARS
                                      PRIOR                                                                              CURRENT
                     ORIGINAL     PRINCIPAL                                                 REALIZED      DEFERRED     PRINCIPAL
     CLASS         FACE VALUE       BALANCE      INTEREST     PRINCIPAL         TOTAL         LOSSES      INTEREST       BALANCE
------------------------------------------------------------------------------------------------------------------------------------
<S>            <C>            <C>             <C>           <C>           <C>                    <C>           <C>  <C>
     IA-1       96,101,504.00  39,904,450.81    224,462.54  2,055,597.77  2,280,060.31           0.00          0.00  37,848,853.04
     IA-2        5,000,000.00   5,000,000.00     28,125.00          0.00     28,125.00           0.00          0.00   5,000,000.00
     IA-3        9,500,000.00   9,500,000.00     53,437.50          0.00     53,437.50           0.00          0.00   9,500,000.00
     IA-4       14,250,000.00  14,250,000.00     80,156.25          0.00     80,156.25           0.00          0.00  14,250,000.00
     IA-5        4,887,000.00   4,887,000.00     27,489.38          0.00     27,489.38           0.00          0.00   4,887,000.00
     IA-6        9,939,000.00   9,939,000.00     55,906.88          0.00     55,906.88           0.00          0.00   9,939,000.00
     I-X *      11,983,709.00   6,608,424.99     37,172.39          0.00     37,172.39           0.00          0.00   6,608,424.99
     I-PO           21,501.00       8,322.46          0.00          9.22          9.22           0.00          0.00       8,313.24
     IIA-1     121,111,453.00  68,174,388.15    369,277.94  1,535,834.84  1,905,112.78           0.00          0.00  66,638,553.31
     IIA-2       1,000,000.00     396,631.99      2,148.42     17,376.59     19,525.01           0.00          0.00     379,255.40
     IIA-3       8,262,000.00   8,262,000.00     44,752.50          0.00     44,752.50           0.00          0.00   8,262,000.00
     IIA-4      14,913,749.00  13,026,693.64     70,561.26     61,123.85    131,685.11           0.00          0.00  12,965,569.79
     IIA-5      46,447,250.00  19,266,100.07    104,358.04    844,054.62    948,412.66           0.00          0.00  18,422,045.45
     IIA-6       2,127,000.00           0.00          0.00          0.00          0.00           0.00          0.00           0.00
     II-X *      7,513,508.12   3,517,671.35     19,054.05          0.00     19,054.05           0.00          0.00   3,517,671.35
     II-PO         350,133.00     267,424.07          0.00      1,305.21      1,305.21           0.00          0.00     266,118.86

------------------------------------------------------------------------------------------------------------------------------------
TOTALS         333,910,590.00 192,882,011.19  1,116,902.15  4,515,302.10  5,632,204.25           0.00          0.00 188,366,709.09
------------------------------------------------------------------------------------------------------------------------------------
  *Notional Class Balance
</TABLE>


<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
                           FACTOR INFORMATION PER $1000 OF ORIGINAL FACE                                    PASS-THROUGH
                                      PRIOR                                                  CURRENT            RATES
                                  PRINCIPAL                                                PRINCIPAL
     CLASS          CUSIP           BALANCE      INTEREST     PRINCIPAL         TOTAL        BALANCE       CURRENT          NEXT
------------------------------------------------------------------------------------------------------------------------------------

<S>             <C>            <C>               <C>          <C>           <C>         <C>              <C>           <C>
     IA-1       055240CT0        415.232324      2.335682     21.389861     23.725542     393.842463     6.750000%     6.750000%
     IA-2       055240CU7      1,000.000000      5.625000      0.000000      5.625000   1,000.000000     6.750000%     6.750000%
     IA-3       055240CV5      1,000.000000      5.625000      0.000000      5.625000   1,000.000000     6.750000%     6.750000%
     IA-4       055240CW3      1,000.000000      5.625000      0.000000      5.625000   1,000.000000     6.750000%     6.750000%
     IA-5       055240CX1      1,000.000000      5.625001      0.000000      5.625001   1,000.000000     6.750000%     6.750000%
     IA-6       055240CY9      1,000.000000      5.625001      0.000000      5.625001   1,000.000000     6.750000%     6.750000%
     I-X *      055240DF9        551.450722      5.625000      0.000000      5.625000     551.450722     6.750000%     0.000000%
     I-PO       055240DH5        387.073159      0.000000      0.428817      0.428817     386.644342     0.000000%     6.500000%
     IIA-1      055240CZ6        562.906203      3.049075     12.681169     15.730245     550.225034     6.500000%     6.500000%
     IIA-2      055240DA0        396.631990      2.148420     17.376590     19.525010     379.255400     6.500000%     6.500000%
     IIA-3      055240DB8      1,000.000000      5.416667      0.000000      5.416667   1,000.000000     6.500000%     6.500000%
     IIA-4      055240DC6        873.468746      4.731289      4.098490      8.829779     869.370256     6.500000%     6.500000%
     IIA-5      055240DD4        414.795280      2.246808     18.172327     20.419135     396.622953     6.500000%     6.500000%
     IIA-6      055240DE2          0.000000      0.000000      0.000000      0.000000       0.000000     6.500000%     6.500000%
     II-X *     055240DG7        468.179617      2.535973      0.000000      2.535973     468.179617     6.500000%     0.000000%
     II-PO      055240DU6        763.778536      0.000000      3.727755      3.727755     760.050781     0.000000%     0.000000%

------------------------------------------------------------------------------------------------------------------------------------
SELLER:                                    Bank of America                     ADMINISTRATOR:               Eiko Akiyama
SERVICER:                                  Bank of America                                                  Deutsche Bank
LEAD UNDERWRITER:                   Donaldson, Lufkin & Jenrette                                      1761 E. St. Andrew Place
RECORD DATE:                               March 30, 2001                                                Santa Ana, CA 92705
DISTRIBUTION DATE:                         April 25, 2001                       FACTOR INFORMATION:        (800) 735-7777
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
                                    Page 2 of 5 (C) COPYRIGHT 2001 Deutsche Bank


<PAGE>


                          BA MORTGAGE SECURITIES, INC.
                       MORTGAGE PASS-THROUGH CERTIFICATES
                                  SERIES 1998-1

                         STATEMENT TO CERTIFICATEHOLDERS

 Statements are available online at http://www-apps.gis.deutsche-bank.com/invr.
    Statement posting begins 7:00 PM Eastern time the business day prior to
                                 distribution.

<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
                                                    DISTRIBUTIONS IN DOLLARS
                                      PRIOR                                                                              CURRENT
                     ORIGINAL     PRINCIPAL                                                 REALIZED      DEFERRED     PRINCIPAL
     CLASS         FACE VALUE       BALANCE      INTEREST     PRINCIPAL         TOTAL         LOSSES      INTEREST       BALANCE
------------------------------------------------------------------------------------------------------------------------------------
<S>              <C>           <C>              <C>           <C>           <C>                 <C>           <C>   <C>
     M           3,776,882.00  3,449,486.49     19,003.61     10,607.35     29,610.96           0.00          0.00  3,438,879.14
     B-1         2,231,794.00  2,038,332.97     11,229.41      6,267.98     17,497.39           0.00          0.00  2,032,064.99
     B-2         1,201,735.00  1,097,563.75      6,046.60      3,375.06      9,421.66           0.00          0.00  1,094,188.69
     B-3         1,030,060.00    940,770.19      5,182.81      2,892.92      8,075.73           0.00          0.00    937,877.27
     B-4           515,029.00    470,384.18      2,591.40      1,446.46      4,037.86           0.00          0.00    468,937.72
     B-5           686,706.32    627,179.78      3,455.20      1,928.58      5,383.78           0.00          0.00    625,251.21
     R-II               50.00          0.00          0.00          0.00          0.00           0.00          0.00          0.00



------------------------------------------------------------------------------------------------------------------------------------
TOTALS           9,442,256.32  8,623,717.36     47,509.03     26,518.35     74,027.38           0.00          0.00  8,597,199.02
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>


<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
                           FACTOR INFORMATION PER $1000 OF ORIGINAL FACE                                    PASS-THROUGH
                                      PRIOR                                                  CURRENT            RATES
                                  PRINCIPAL                                                PRINCIPAL
     CLASS          CUSIP           BALANCE      INTEREST     PRINCIPAL         TOTAL        BALANCE       CURRENT          NEXT
------------------------------------------------------------------------------------------------------------------------------------
<S>             <C>              <C>             <C>           <C>           <C>          <C>            <C>           <C>
     M          055240DJ1        913.315928      5.031560      2.808494      7.840054     910.507434     6.610935%     6.611161%
     B-1        055240DK8        913.315911      5.031562      2.808494      7.840056     910.507417     6.610935%     6.611161%
     B-2        055240DL6        913.315956      5.031559      2.808489      7.840048     910.507466     6.610935%     6.611161%
     B-3        055240DM4        913.315914      5.031561      2.808497      7.840058     910.507417     6.610935%     6.611161%
     B-4        055240DN2        913.315910      5.031561      2.808502      7.840063     910.507408     6.610935%     6.611161%
     B-5        055240DP7        913.315870      5.031554      2.808442      7.839996     910.507435     6.610935%     6.611161%
     R-II       055240DR3          0.000000      0.000000      0.000000      0.000000       0.000000     6.750000%     6.750000%



------------------------------------------------------------------------------------------------------------------------------------
SELLER:                                    Bank of America                     ADMINISTRATOR:               Eiko Akiyama
SERVICER:                                  Bank of America                                                  Deutsche Bank
LEAD UNDERWRITER:                   Donaldson, Lufkin & Jenrette                                      1761 E. St. Andrew Place
RECORD DATE:                               March 30, 2001                                                Santa Ana, CA 92705
DISTRIBUTION DATE:                         April 25, 2001                           FACTOR INFORMATION:    (800) 735-7777
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
                                    Page 3 of 5 (C) COPYRIGHT 2001 Deutsche Bank


<PAGE>


                          BA MORTGAGE SECURITIES, INC.
                       MORTGAGE PASS-THROUGH CERTIFICATES
                                  SERIES 1998-1

                         STATEMENT TO CERTIFICATEHOLDERS
<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
Distribution Date:            April 25, 2001
------------------------------------------------------------------------------------------------------------------------------------


MORTGAGE POOL INFORMATION:                                                 GROUP I                     GROUP II
--------------------------                                                 -------                     --------

<S>                                                                     <C>                          <C>
                BEGINNING BALANCE OF POOL                               87,315,476.33                114,190,252.49
                LESS:         SCHEDULED PRINCIPAL                          (91,493.95)                 (535,809.90)
                              PRINCIPAL PREPAYMENTS                     (1,968,122.86)               (1,946,393.76)
                              REPURCHASES                                        0.00                         0.00
                              LIQUIDATIONS                                       0.00                         0.00
                              OTHER UNSCHEDULED PRINCIPAL                        0.00                         0.00
                                                                        -------------                --------------
                ENDING BALANCE OF POOL                                  85,255,859.52                111,708,048.83
                                                                        =============                ==============

                BEGINNING NUMBER OF LOANS IN POOL                                 280                          379
                ENDING NUMBER OF LOANS IN POOL                                    273                          373

                WEIGHTED AVERAGE REMAINING TERM TO MATURITY                       310                          138
                WEIGHTED AVERAGE NET CONTRACT RATE                          7.510227%                    7.069127%

                CURRENT REALIZED LOSSES ON THE POOL                              0.00                         0.00
                CUMULATIVE REALIZED LOSSES ON THE POOL                           0.00                         0.00

                BEGINNING POOL BALANCE OF PREMIUM LOANS                 86,143,717.03                105,059,476.69
                STRIPPED INTEREST RATE                                      0.517819%                    0.217637%
</TABLE>

<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
DELINQUENT, BANKRUPTCY,                                                                   LOANS          LOANS         LOANS
FORECLOSURE, AND REO                          30 TO 59      60 TO 89       90 PLUS          IN            IN            IN
LOAN INFORMATION                                DAYS          DAYS          DAYS        BANKRUPTCY    FORECLOSURE       REO
------------------------------------------------------------------------------------------------------------------------------------
<S>                                            <C>              <C>           <C>         <C>              <C>           <C>
GROUP I         PRINCIPAL BALANCE                    0.00          0.00          0.00     250,529.74          0.00          0.00
                     PERCENTAGE OF GROUP BAL.     0.0000%       0.0000%       0.0000%        0.1272%       0.0000%       0.0000%
                NUMBER OF LOANS                         0             0             0              1             0             0
                     PERCENTAGE OF LOANS          0.0000%       0.0000%       0.0000%        0.1548%       0.0000%       0.0000%
GROUP II        PRINCIPAL BALANCE              230,327.92          0.00          0.00           0.00          0.00          0.00
                     PERCENTAGE OF GROUP BAL.     0.1169%       0.0000%       0.0000%        0.0000%       0.0000%       0.0000%
                NUMBER OF LOANS                         1             0             0              0             0             0
                     PERCENTAGE OF LOANS          0.1548%       0.0000%       0.0000%        0.0000%       0.0000%       0.0000%
------------------------------------------------------------------------------------------------------------------------------------
                GROUP I BOOK VALUE OF REO PROPERTIES                                                            NA
                GROUP II BOOK VALUE OF REO PROPERTIES                                                           NA
</TABLE>

<TABLE>
<CAPTION>

SERVICING INFORMATION:                                                     GROUP I                     GROUP II
----------------------                                                     -------                     --------

<S>                                                                         <C>                          <C>
                SERVICING FEES ACCRUED DURING THE CURRENT DUE PERIOD        18,190.73                    36,551.75
                PLUS:         ADDITIONAL SERVICING COMPENSATION                  0.00                         0.00
                LESS:         AMTS. TO COVER PREPAYMENT INT. SHORTFALL      (7,942.38)                   (4,762.87)
                              DELINQUENT SERVICING FEES                     (1,836.41)                   (3,481.19)
                                                                        -------------                --------------
                SERVICING FEES COLLECTED FOR THE CURRENT DUE PERIOD          8,411.94                    28,307.69
                                                                        =============                ==============

                ADVANCED PRINCIPAL                                           8,879.15                    50,504.83
                ADVANCED INTEREST                                           52,775.36                    61,535.77
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>

                                    Page 4 of 5 (C) COPYRIGHT 2001 Deutsche Bank


<PAGE>



                          BA MORTGAGE SECURITIES, INC.
                       MORTGAGE PASS-THROUGH CERTIFICATES
                                  SERIES 1998-1

                         STATEMENT TO CERTIFICATEHOLDERS
<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
Distribution Date:            April 25, 2001
------------------------------------------------------------------------------------------------------------------------------------

                                                OTHER                                   CUMULATIVE
                               PREPAYMENT    UNSCHEDULED                 CERTIFICATE      UNPAID                    CUMULATIVE
                                PRINCIPAL     PRINCIPAL                   INTEREST       INTEREST                    REALIZED
     CLASS                     DISTRIBUTED   DISTRIBUTED                  SHORTFALL     SHORTFALL                     LOSSES
------------------------------------------------------------------------------------------------------------------------------------
<S>                            <C>                   <C>                         <C>            <C>                         <C>
       CLASS IA-1              1,968,114.03          0.00                        0.00           0.00                        0.00
       CLASS IA-2                      0.00          0.00                        0.00           0.00                        0.00
       CLASS IA-3                      0.00          0.00                        0.00           0.00                        0.00
       CLASS IA-4                      0.00          0.00                        0.00           0.00                        0.00
       CLASS IA-5                      0.00          0.00                        0.00           0.00                        0.00
       CLASS IA-6                      0.00          0.00                        0.00           0.00                        0.00
       CLASS I-X                       0.00          0.00                        0.00           0.00                        0.00
       CLASS I-PO                      8.83          0.00                        0.00           0.00                        0.00
       CLASS IIA-1             1,215,329.23          0.00                        0.00           0.00                        0.00
       CLASS IIA-2                13,750.36          0.00                        0.00           0.00                        0.00
       CLASS IIA-3                     0.00          0.00                        0.00           0.00                        0.00
       CLASS IIA-4                48,368.22          0.00                        0.00           0.00                        0.00
       CLASS IIA-5               667,913.12          0.00                        0.00           0.00                        0.00
       CLASS IIA-6                     0.00          0.00                        0.00           0.00                        0.00
       CLASS II-X                      0.00          0.00                        0.00           0.00                        0.00
       CLASS II-PO                 1,032.83          0.00                        0.00           0.00                        0.00
       CLASS M                         0.00          0.00                        0.00           0.00                        0.00
       CLASS B-1                       0.00          0.00                        0.00           0.00                        0.00
       CLASS B-2                       0.00          0.00                        0.00           0.00                        0.00
       CLASS B-3                       0.00          0.00                        0.00           0.00                        0.00
       CLASS B-4                       0.00          0.00                        0.00           0.00                        0.00
       CLASS B-5                       0.00          0.00                        0.00           0.00                        0.00
------------------------------------------------------------------------------------------------------------------------------------
    TOTALS                     3,914,516.62          0.00                        0.00           0.00                        0.00
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>

<TABLE>
<CAPTION>

<S>                                                                                                         <C>
                OTHER REPORTING ITEMS:

                GROUP I PERCENTAGE                                                                          95.62%
                GROUP I PREPAYMENT PERCENTAGE                                                              100.00%
                GROUP II PERCENTAGE                                                                         95.79%
                GROUP II PREPAYMENT PERCENTAGE                                                             100.00%

                SUBORDINATE PRINCIPAL DISTRIBUTION AMOUNT                                                26,518.37
                HAS THE CREDIT SUPPORT DEPLETION DATE OCCURRED                                                  No

                BANKRUPTCY AMOUNT                                                                       100,000.00
                FRAUD LOSS AMOUNT                                                                       119,926.36
                SPECIAL HAZARD AMOUNT                                                                 4,500,664.47
                EXTRAORDINARY LOSSES FOR THE PRIOR PERIOD                                                     0.00

                GROUP I EXTRAORDINARY LOSSES                                                                  0.00
                GROUP II EXTRAORDINARY LOSSES                                                                 0.00

------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
                                    Page 5 of 5 (C) COPYRIGHT 2001 Deutsche Bank


<PAGE>

                          BA MORTGAGE SECURITIES, INC.
                       MORTGAGE PASS-THROUGH CERTIFICATES
                                  SERIES 1998-1

                         STATEMENT TO CERTIFICATEHOLDERS

 Statements are available online at http://www-apps.gis.deutsche-bank.com/invr.
    Statement posting begins 7:00 PM Eastern time the business day prior to
                                 distribution.


<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
                                                     DISTRIBUTIONS IN DOLLARS
                                       PRIOR                                                                               CURRENT
                     ORIGINAL      PRINCIPAL                                                 REALIZED      DEFERRED      PRINCIPAL
     CLASS         FACE VALUE        BALANCE      INTEREST     PRINCIPAL          TOTAL        LOSSES      INTEREST        BALANCE
------------------------------------------------------------------------------------------------------------------------------------
<S>            <C>            <C>             <C>           <C>            <C>                   <C>           <C>  <C>
     P1-M           21,501.00       8,313.24          0.00          9.16           9.16          0.00          0.00       8,304.08
     P2-M          350,133.00     266,118.86          0.00      1,356.93       1,356.93          0.00          0.00     264,761.93
     X1-M *    142,084,361.67  84,085,581.07     36,136.11          0.00      36,136.11          0.00          0.00  83,162,180.54
     X2-M *    187,559,494.52 102,622,004.49     18,472.67          0.00      18,472.67          0.00          0.00 101,722,414.41
     Y1             71,698.81      41,593.97        233.97          0.00         233.97          0.00          0.00      41,593.97
     Y2             99,676.65      51,950.46        281.40        194.99         476.39          0.00          0.00      51,755.47
     Z1        143,556,266.44  85,205,952.35    479,283.48    924,798.27   1,404,081.75          0.00          0.00  84,281,154.08
     Z2        199,253,620.42 111,389,979.22    603,362.38    944,175.16   1,547,537.54          0.00          0.00 110,445,804.06
     R-I                50.00           0.00          0.00          0.00           0.00          0.00          0.00           0.00


------------------------------------------------------------------------------------------------------------------------------------
TOTALS         343,352,946.32 196,963,908.10  1,137,770.01  1,870,534.51   3,008,304.52          0.00          0.00 195,093,373.59
------------------------------------------------------------------------------------------------------------------------------------
  *Notional Class Balance
</TABLE>


<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
                            FACTOR INFORMATION PER $1000 OF ORIGINAL FACE                                     PASS-THROUGH
                                       PRIOR                                                  CURRENT            RATES
                                   PRINCIPAL                                                PRINCIPAL
     CLASS          CUSIP            BALANCE      INTEREST     PRINCIPAL          TOTAL       BALANCE       CURRENT           NEXT
------------------------------------------------------------------------------------------------------------------------------------
<S>             <C>                 <C>           <C>           <C>            <C>           <C>          <C>            <C>
     P1-M                         386.644342      0.000000      0.426027       0.426027    386.218315     0.000000%      0.000000%
     P2-M                         760.050781      0.000000      3.875470       3.875470    756.175311     0.000000%      0.000000%
     X1-M *                       591.800393      0.254329      0.000000       0.254329    585.301433     0.515705%      0.515705%
     X2-M *                       547.143746      0.098490      0.000000       0.098490    542.347454     0.216008%      0.216008%
     Y1                           580.120766      3.263234      0.000000       3.263234    580.120766     6.750000%      6.750000%
     Y2                           521.189875      2.823129      1.956197       4.779326    519.233650     6.500000%      6.500000%
     Z1                           593.536977      3.338645      6.442061       9.780707    587.094915     6.750000%      6.750000%
     Z2                           559.036162      3.028113      4.738560       7.766672    554.297602     6.500000%      6.500000%
     R-I        055240DQ5           0.000000      0.000000      0.000000       0.000000      0.000000     6.750000%      6.750000%

------------------------------------------------------------------------------------------------------------------------------------
SELLER:                                    Bank of America                      ADMINISTRATOR:                Eiko Akiyama
SERVICER:                                  Bank of America                                                   Deutsche Bank
LEAD UNDERWRITER:                    Donaldson, Lufkin & Jenrette                                       1761 E. St. Andrew Place
RECORD DATE:                                April 30, 2001                                                Santa Ana, CA 92705
DISTRIBUTION DATE:                           May 25, 2001                       FACTOR INFORMATION:          (800) 735-7777
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
                                    Page 1 of 5 (C) COPYRIGHT 2001 Deutsche Bank


<PAGE>


                          BA MORTGAGE SECURITIES, INC.
                       MORTGAGE PASS-THROUGH CERTIFICATES
                                  SERIES 1998-1

                         STATEMENT TO CERTIFICATEHOLDERS

 Statements are available online at http://www-apps.gis.deutsche-bank.com/invr.
    Statement posting begins 7:00 PM Eastern time the business day prior to
                                 distribution.

<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
                                                     DISTRIBUTIONS IN DOLLARS
                                       PRIOR                                                                               CURRENT
                     ORIGINAL      PRINCIPAL                                                 REALIZED      DEFERRED      PRINCIPAL
     CLASS         FACE VALUE        BALANCE      INTEREST     PRINCIPAL          TOTAL        LOSSES      INTEREST        BALANCE
------------------------------------------------------------------------------------------------------------------------------------
<S>            <C>            <C>             <C>           <C>            <C>                   <C>           <C>  <C>
     IA-1       96,101,504.00  37,848,853.04    212,899.80    920,700.85   1,133,600.65          0.00          0.00  36,928,152.19
     IA-2        5,000,000.00   5,000,000.00     28,125.00          0.00      28,125.00          0.00          0.00   5,000,000.00
     IA-3        9,500,000.00   9,500,000.00     53,437.50          0.00      53,437.50          0.00          0.00   9,500,000.00
     IA-4       14,250,000.00  14,250,000.00     80,156.25          0.00      80,156.25          0.00          0.00  14,250,000.00
     IA-5        4,887,000.00   4,887,000.00     27,489.38          0.00      27,489.38          0.00          0.00   4,887,000.00
     IA-6        9,939,000.00   9,939,000.00     55,906.88          0.00      55,906.88          0.00          0.00   9,939,000.00
     I-X *      11,983,709.00   6,424,197.93     36,136.09          0.00      36,136.09          0.00          0.00   6,330,794.02
     I-PO           21,501.00       8,313.24          0.00          9.16           9.16          0.00          0.00       8,304.08
     IIA-1     121,111,453.00  66,638,553.31    360,958.83    575,597.91     936,556.74          0.00          0.00  66,062,955.40
     IIA-2       1,000,000.00     379,255.40      2,054.30      5,713.56       7,767.86          0.00          0.00     373,541.84
     IIA-3       8,262,000.00   8,262,000.00     44,752.50          0.00      44,752.50          0.00          0.00   8,262,000.00
     IIA-4      14,913,749.00  12,965,569.79     70,230.17     62,508.46     132,738.63          0.00          0.00  12,903,061.33
     IIA-5      46,447,250.00  18,422,045.45     99,786.08    277,531.80     377,317.88          0.00          0.00  18,144,513.65
     IIA-6       2,127,000.00           0.00          0.00          0.00           0.00          0.00          0.00           0.00
     II-X *      7,513,508.12   3,410,338.27     18,472.67          0.00      18,472.67          0.00          0.00   3,389,038.59
     II-PO         350,133.00     266,118.86          0.00      1,356.93       1,356.93          0.00          0.00     264,761.93


------------------------------------------------------------------------------------------------------------------------------------
TOTALS         333,910,590.00 188,366,709.09  1,090,405.45  1,843,418.67   2,933,824.12          0.00          0.00 186,523,290.42
------------------------------------------------------------------------------------------------------------------------------------
  *Notional Class Balance
</TABLE>


<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
                            FACTOR INFORMATION PER $1000 OF ORIGINAL FACE                                     PASS-THROUGH
                                       PRIOR                                                  CURRENT            RATES
                                   PRINCIPAL                                                PRINCIPAL
     CLASS          CUSIP            BALANCE      INTEREST     PRINCIPAL          TOTAL       BALANCE       CURRENT           NEXT
------------------------------------------------------------------------------------------------------------------------------------

<S>             <C>             <C>               <C>           <C>           <C>        <C>              <C>            <C>
     IA-1       055240CT0         393.842463      2.215364      9.580504      11.795868    384.261959     6.750000%      6.750000%
     IA-2       055240CU7       1,000.000000      5.625000      0.000000       5.625000  1,000.000000     6.750000%      6.750000%
     IA-3       055240CV5       1,000.000000      5.625000      0.000000       5.625000  1,000.000000     6.750000%      6.750000%
     IA-4       055240CW3       1,000.000000      5.625000      0.000000       5.625000  1,000.000000     6.750000%      6.750000%
     IA-5       055240CX1       1,000.000000      5.625001      0.000000       5.625001  1,000.000000     6.750000%      6.750000%
     IA-6       055240CY9       1,000.000000      5.625001      0.000000       5.625001  1,000.000000     6.750000%      6.750000%
     I-X *      055240DF9         536.077597      5.624996      0.000000       5.624996    528.283357     6.750000%      0.000000%
     I-PO       055240DH5         386.644342      0.000000      0.426027       0.426027    386.218315     0.000000%      6.500000%
     IIA-1      055240CZ6         550.225034      2.980386      4.752630       7.733015    545.472404     6.500000%      6.500000%
     IIA-2      055240DA0         379.255400      2.054300      5.713560       7.767860    373.541840     6.500000%      6.500000%
     IIA-3      055240DB8       1,000.000000      5.416667      0.000000       5.416667  1,000.000000     6.500000%      6.500000%
     IIA-4      055240DC6         869.370256      4.709089      4.191331       8.900420    865.178925     6.500000%      6.500000%
     IIA-5      055240DD4         396.622953      2.148374      5.975204       8.123579    390.647749     6.500000%      6.500000%
     IIA-6      055240DE2           0.000000      0.000000      0.000000       0.000000      0.000000     6.500000%      6.500000%
     II-X *     055240DG7         453.894269      2.458595      0.000000       2.458595    451.059416     6.500000%      0.000000%
     II-PO      055240DU6         760.050781      0.000000      3.875470       3.875470    756.175311     0.000000%      0.000000%



------------------------------------------------------------------------------------------------------------------------------------
SELLER:                                    Bank of America                      ADMINISTRATOR:                Eiko Akiyama
SERVICER:                                  Bank of America                                                   Deutsche Bank
LEAD UNDERWRITER:                    Donaldson, Lufkin & Jenrette                                       1761 E. St. Andrew Place
RECORD DATE:                                April 30, 2001                                                Santa Ana, CA 92705
DISTRIBUTION DATE:                           May 25, 2001                            FACTOR INFORMATION:     (800) 735-7777
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
                                    Page 2 of 5 (C) COPYRIGHT 2001 Deutsche Bank



                          BA MORTGAGE SECURITIES, INC.
                       MORTGAGE PASS-THROUGH CERTIFICATES
                                  SERIES 1998-1

                         STATEMENT TO CERTIFICATEHOLDERS

 Statements are available online at http://www-apps.gis.deutsche-bank.com/invr.
    Statement posting begins 7:00 PM Eastern time the business day prior to
                                 distribution.


<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
                                                     DISTRIBUTIONS IN DOLLARS
                                       PRIOR                                                                               CURRENT
                     ORIGINAL      PRINCIPAL                                                 REALIZED      DEFERRED      PRINCIPAL
     CLASS         FACE VALUE        BALANCE      INTEREST     PRINCIPAL          TOTAL        LOSSES      INTEREST        BALANCE
------------------------------------------------------------------------------------------------------------------------------------
<S>              <C>            <C>              <C>           <C>            <C>                <C>           <C>    <C>
     M           3,776,882.00   3,438,879.14     18,945.82     10,846.34      29,792.16          0.00          0.00   3,428,032.80
     B-1         2,231,794.00   2,032,064.99     11,195.26      6,409.20      17,604.46          0.00          0.00   2,025,655.79
     B-2         1,201,735.00   1,094,188.69      6,028.21      3,451.11       9,479.32          0.00          0.00   1,090,737.58
     B-3         1,030,060.00     937,877.27      5,167.05      2,958.10       8,125.15          0.00          0.00     934,919.17
     B-4           515,029.00     468,937.72      2,583.52      1,479.05       4,062.57          0.00          0.00     467,458.67
     B-5           686,706.32     625,251.21      3,444.70      1,972.04       5,416.74          0.00          0.00     623,279.17
     R-II               50.00           0.00          0.00          0.00           0.00          0.00          0.00           0.00



------------------------------------------------------------------------------------------------------------------------------------
TOTALS           9,442,256.32   8,597,199.02     47,364.56     27,115.84      74,480.40          0.00          0.00   8,570,083.18
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>



<TABLE>
<CAPTION>
                            FACTOR INFORMATION PER $1000 OF ORIGINAL FACE                                     PASS-THROUGH
                                       PRIOR                                                  CURRENT            RATES
                                   PRINCIPAL                                                PRINCIPAL
     CLASS          CUSIP            BALANCE      INTEREST     PRINCIPAL          TOTAL       BALANCE       CURRENT           NEXT
------------------------------------------------------------------------------------------------------------------------------------
<S>             <C>               <C>             <C>           <C>            <C>         <C>            <C>            <C>
     M          055240DJ1         910.507434      5.016259      2.871771       7.888030    907.635663     6.611161%      6.611393%
     B-1        055240DK8         910.507417      5.016260      2.871770       7.888031    907.635646     6.611161%      6.611393%
     B-2        055240DL6         910.507466      5.016256      2.871773       7.888029    907.635693     6.611161%      6.611393%
     B-3        055240DM4         910.507417      5.016261      2.871774       7.888036    907.635643     6.611161%      6.611393%
     B-4        055240DN2         910.507408      5.016261      2.871780       7.888041    907.635628     6.611161%      6.611393%
     B-5        055240DP7         910.507435      5.016264      2.871737       7.888001    907.635698     6.611161%      6.611393%
     R-II       055240DR3           0.000000      0.000000      0.000000       0.000000      0.000000     6.750000%      6.750000%


------------------------------------------------------------------------------------------------------------------------------------
SELLER:                                    Bank of America                      ADMINISTRATOR:                Eiko Akiyama
SERVICER:                                  Bank of America                                                   Deutsche Bank
LEAD UNDERWRITER:                    Donaldson, Lufkin & Jenrette                                       1761 E. St. Andrew Place
RECORD DATE:                                April 30, 2001                                                Santa Ana, CA 92705
DISTRIBUTION DATE:                           May 25, 2001                       FACTOR INFORMATION:          (800) 735-7777
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
                                    Page 3 of 5 (C) COPYRIGHT 2001 Deutsche Bank


<PAGE>


                          BA MORTGAGE SECURITIES, INC.
                       MORTGAGE PASS-THROUGH CERTIFICATES
                                  SERIES 1998-1

                         STATEMENT TO CERTIFICATEHOLDERS
<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
Distribution Date:            May 25, 2001
------------------------------------------------------------------------------------------------------------------------------------


MORTGAGE POOL INFORMATION:                                                  GROUP I                     GROUP II
--------------------------                                                  -------                     --------

<S>                                                                       <C>                         <C>
                BEGINNING BALANCE OF POOL                                 85,255,859.52               111,708,048.83
                LESS:         SCHEDULED PRINCIPAL                            (91,383.09)                (538,542.29)
                              PRINCIPAL PREPAYMENTS                         (833,424.34)                (407,184.80)
                              REPURCHASES                                          0.00                        0.00
                              LIQUIDATIONS                                         0.00                        0.00
                              OTHER UNSCHEDULED PRINCIPAL                          0.00                        0.00
                                                                          -------------               --------------
                ENDING BALANCE OF POOL                                    84,331,052.09               110,762,321.74
                                                                          =============               ==============

                BEGINNING NUMBER OF LOANS IN POOL                                   273                         373
                ENDING NUMBER OF LOANS IN POOL                                      270                         372

                WEIGHTED AVERAGE REMAINING TERM TO MATURITY                         309                         137
                WEIGHTED AVERAGE NET CONTRACT RATE                            7.507968%                   7.065772%

                CURRENT REALIZED LOSSES ON THE POOL                                0.00                        0.00
                CUMULATIVE REALIZED LOSSES ON THE POOL                             0.00                        0.00

                BEGINNING POOL BALANCE OF PREMIUM LOANS                   84,085,581.07               102,622,004.49
                STRIPPED INTEREST RATE                                        0.515705%                   0.216008%
</TABLE>

<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
DELINQUENT, BANKRUPTCY,                                                                     LOANS         LOANS         LOANS
FORECLOSURE, AND REO                           30 TO 59      60 TO 89       90 PLUS          IN            IN             IN
LOAN INFORMATION                                 DAYS          DAYS           DAYS       BANKRUPTCY    FORECLOSURE       REO
------------------------------------------------------------------------------------------------------------------------------------
<S>                                             <C>              <C>            <C>        <C>              <C>            <C>
GROUP I         PRINCIPAL BALANCE               235,546.41          0.00           0.00    250,265.59          0.00           0.00
                     PERCENTAGE OF GROUP BAL.      0.1207%       0.0000%        0.0000%       0.1283%       0.0000%        0.0000%
                NUMBER OF LOANS                          1             0              0             1             0              0
                     PERCENTAGE OF LOANS           0.1558%       0.0000%        0.0000%       0.1558%       0.0000%        0.0000%
GROUP II        PRINCIPAL BALANCE               230,095.90          0.00           0.00          0.00          0.00           0.00
                     PERCENTAGE OF GROUP BAL.      0.1179%       0.0000%        0.0000%       0.0000%       0.0000%        0.0000%
                NUMBER OF LOANS                          1             0              0             0             0              0
                     PERCENTAGE OF LOANS           0.1558%       0.0000%        0.0000%       0.0000%       0.0000%        0.0000%
------------------------------------------------------------------------------------------------------------------------------------
                GROUP I BOOK VALUE OF REO PROPERTIES                                                             NA
                GROUP II BOOK VALUE OF REO PROPERTIES                                                            NA
</TABLE>


<TABLE>
<CAPTION>
SERVICING INFORMATION:                                                      GROUP I                     GROUP II
----------------------                                                      -------                     --------

<S>                                                                           <C>                         <C>
                SERVICING FEES ACCRUED DURING THE CURRENT DUE PERIOD          17,761.64                   35,636.56
                PLUS:         ADDITIONAL SERVICING COMPENSATION                    0.00                        0.00
                LESS:         AMTS. TO COVER PREPAYMENT INT. SHORTFALL        (3,021.06)                    (879.80)
                              DELINQUENT SERVICING FEES                       (1,414.60)                  (2,367.70)
                                                                          -------------               --------------
                SERVICING FEES COLLECTED FOR THE CURRENT DUE PERIOD           13,325.98                   32,389.06
                                                                          =============               ==============

                ADVANCED PRINCIPAL                                             7,031.67                   32,669.57
                ADVANCED INTEREST                                             40,894.34                   39,469.43
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
                                    Page 4 of 5 (C) COPYRIGHT 2001 Deutsche Bank


<PAGE>



                          BA MORTGAGE SECURITIES, INC.
                       MORTGAGE PASS-THROUGH CERTIFICATES
                                  SERIES 1998-1

                         STATEMENT TO CERTIFICATEHOLDERS


<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
Distribution Date:            May 25, 2001
------------------------------------------------------------------------------------------------------------------------------------

                                                 OTHER                                   CUMULATIVE
                                PREPAYMENT    UNSCHEDULED                 CERTIFICATE      UNPAID                     CUMULATIVE
                                PRINCIPAL      PRINCIPAL                    INTEREST      INTEREST                     REALIZED
     CLASS                     DISTRIBUTED    DISTRIBUTED                  SHORTFALL      SHORTFALL                     LOSSES
------------------------------------------------------------------------------------------------------------------------------------
<S>                               <C>                 <C>                          <C>           <C>                          <C>
       CLASS IA-1                 833,416.05          0.00                         0.00          0.00                         0.00
       CLASS IA-2                       0.00          0.00                         0.00          0.00                         0.00
       CLASS IA-3                       0.00          0.00                         0.00          0.00                         0.00
       CLASS IA-4                       0.00          0.00                         0.00          0.00                         0.00
       CLASS IA-5                       0.00          0.00                         0.00          0.00                         0.00
       CLASS IA-6                       0.00          0.00                         0.00          0.00                         0.00
       CLASS I-X                        0.00          0.00                         0.00          0.00                         0.00
       CLASS I-PO                       8.29          0.00                         0.00          0.00                         0.00
       CLASS IIA-1                254,007.28          0.00                         0.00          0.00                         0.00
       CLASS IIA-2                  2,521.35          0.00                         0.00          0.00                         0.00
       CLASS IIA-3                      0.00          0.00                         0.00          0.00                         0.00
       CLASS IIA-4                 27,584.54          0.00                         0.00          0.00                         0.00
       CLASS IIA-5                122,472.82          0.00                         0.00          0.00                         0.00
       CLASS IIA-6                      0.00          0.00                         0.00          0.00                         0.00
       CLASS II-X                       0.00          0.00                         0.00          0.00                         0.00
       CLASS II-PO                    598.80          0.00                         0.00          0.00                         0.00
       CLASS M                          0.00          0.00                         0.00          0.00                         0.00
       CLASS B-1                        0.00          0.00                         0.00          0.00                         0.00
       CLASS B-2                        0.00          0.00                         0.00          0.00                         0.00
       CLASS B-3                        0.00          0.00                         0.00          0.00                         0.00
       CLASS B-4                        0.00          0.00                         0.00          0.00                         0.00
       CLASS B-5                        0.00          0.00                         0.00          0.00                         0.00
------------------------------------------------------------------------------------------------------------------------------------
    TOTALS                      1,240,609.14          0.00                         0.00          0.00                         0.00
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>


<TABLE>
<CAPTION>

<S>                                                                                                    <C>
                OTHER REPORTING ITEMS:


                GROUP I PERCENTAGE                                                                           95.52%
                GROUP I PREPAYMENT PERCENTAGE                                                               100.00%
                GROUP II PERCENTAGE                                                                          95.72%
                GROUP II PREPAYMENT PERCENTAGE                                                              100.00%

                SUBORDINATE PRINCIPAL DISTRIBUTION AMOUNT                                                 27,115.85
                HAS THE CREDIT SUPPORT DEPLETION DATE OCCURRED                                                   No

                BANKRUPTCY AMOUNT                                                                        100,000.00
                FRAUD LOSS AMOUNT                                                                        119,926.36
                SPECIAL HAZARD AMOUNT                                                                  4,500,664.47
                EXTRAORDINARY LOSSES FOR THE PRIOR PERIOD                                                      0.00

                GROUP I EXTRAORDINARY LOSSES                                                                   0.00
                GROUP II EXTRAORDINARY LOSSES                                                                  0.00

------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
                                    Page 5 of 5 (C) COPYRIGHT 2001 Deutsche Bank


<PAGE>

                          BA MORTGAGE SECURITIES, INC.

                       MORTGAGE PASS-THROUGH CERTIFICATES
                                  SERIES 1998-1

                         STATEMENT TO CERTIFICATEHOLDERS

 Statements are available online at http://www-apps.gis.deutsche-bank.com/invr.
    Statement posting begins 7:00 PM Eastern time the business day prior to
                                 distribution.


<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
                                                     DISTRIBUTIONS IN DOLLARS
                                       PRIOR                                                                               CURRENT
                     ORIGINAL      PRINCIPAL                                                 REALIZED      DEFERRED      PRINCIPAL
     CLASS         FACE VALUE        BALANCE      INTEREST     PRINCIPAL          TOTAL        LOSSES      INTEREST        BALANCE
------------------------------------------------------------------------------------------------------------------------------------
<S>            <C>            <C>             <C>           <C>            <C>                   <C>           <C>  <C>
     P1-M           21,501.00       8,304.08          0.00          9.36           9.36          0.00          0.00       8,294.72
     P2-M          350,133.00     264,761.93          0.00     21,093.86      21,093.86          0.00          0.00     243,668.07
     X1-M *    142,084,361.67  83,162,180.54     35,610.72          0.00      35,610.72          0.00          0.00  80,921,505.02
     X2-M *    187,559,494.52 101,722,414.41     18,357.29          0.00      18,357.29          0.00          0.00  98,508,091.59
     Y1             71,698.81      41,593.97        233.98      1,674.78       1,908.76          0.00          0.00      39,919.19
     Y2             99,676.65      51,755.47        280.34      2,267.35       2,547.69          0.00          0.00      49,488.12
     Z1        143,556,266.44  84,281,154.08    474,081.49  2,240,506.41   2,714,587.90          0.00          0.00  82,040,647.67
     Z2        199,253,620.42 110,445,804.06    598,248.10  3,851,412.06   4,449,660.17          0.00          0.00 106,594,392.00
     R-I                50.00           0.00          0.00          0.00           0.00          0.00          0.00           0.00

------------------------------------------------------------------------------------------------------------------------------------
TOTALS         343,352,946.32 195,093,373.59  1,126,811.92  6,116,963.83   7,243,775.75          0.00          0.00 188,976,409.77
------------------------------------------------------------------------------------------------------------------------------------
  *Notional Class Balance
</TABLE>


<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
                            FACTOR INFORMATION PER $1000 OF ORIGINAL FACE                                     PASS-THROUGH
                                       PRIOR                                                  CURRENT            RATES
                                   PRINCIPAL                                                PRINCIPAL
     CLASS          CUSIP            BALANCE      INTEREST     PRINCIPAL          TOTAL       BALANCE       CURRENT           NEXT
------------------------------------------------------------------------------------------------------------------------------------
<S>             <C>                 <C>           <C>           <C>            <C>           <C>          <C>            <C>
     P1-M                         386.218315      0.000000      0.435329       0.435329    385.782987     0.000000%      0.000000%
     P2-M                         756.175311      0.000000     60.245278      60.245278    695.930032     0.000000%      0.000000%
     X1-M *                       585.301433      0.250631      0.000000       0.250631    569.531397     0.513850%      0.513850%
     X2-M *                       542.347454      0.097874      0.000000       0.097874    525.209837     0.216557%      0.216557%
     Y1                           580.120766      3.263373     23.358507      26.621880    556.762220     6.750000%      6.750000%
     Y2                           519.233650      2.812494     22.747091      25.559585    496.486597     6.500000%      6.500000%
     Z1                           587.094915      3.302409     15.607166      18.909574    571.487750     6.750000%      6.750000%
     Z2                           554.297602      3.002445     19.329195      22.331640    534.968407     6.500000%      6.500000%
     R-I        055240DQ5           0.000000      0.000000      0.000000       0.000000      0.000000     6.750000%      6.750000%



------------------------------------------------------------------------------------------------------------------------------------
SELLER:                                    Bank of America                      ADMINISTRATOR:                Eiko Akiyama
SERVICER:                                  Bank of America                                                   Deutsche Bank
LEAD UNDERWRITER:                    Donaldson, Lufkin & Jenrette                                       1761 E. St. Andrew Place
RECORD DATE:                                 May 31, 2001                                                 Santa Ana, CA 92705
DISTRIBUTION DATE:                          June 25, 2001                       FACTOR INFORMATION:          (800) 735-7777
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>

                                    Page 1 of 5 (C) COPYRIGHT 2001 Deutsche Bank


<PAGE>


                          BA MORTGAGE SECURITIES, INC.
                       MORTGAGE PASS-THROUGH CERTIFICATES
                                  SERIES 1998-1

                         STATEMENT TO CERTIFICATEHOLDERS

 Statements are available online at http://www-apps.gis.deutsche-bank.com/invr.
    Statement posting begins 7:00 PM Eastern time the business day prior to
                                 distribution.


<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
                                                     DISTRIBUTIONS IN DOLLARS
                                       PRIOR                                                                               CURRENT
                     ORIGINAL      PRINCIPAL                                                 REALIZED      DEFERRED      PRINCIPAL
     CLASS         FACE VALUE        BALANCE      INTEREST     PRINCIPAL          TOTAL        LOSSES      INTEREST        BALANCE
------------------------------------------------------------------------------------------------------------------------------------
<S>            <C>            <C>             <C>           <C>            <C>                   <C>           <C>  <C>
     IA-1       96,101,504.00  36,928,152.19    207,720.86  2,238,115.49   2,445,836.35          0.00          0.00  34,690,036.70
     IA-2        5,000,000.00   5,000,000.00     28,125.00          0.00      28,125.00          0.00          0.00   5,000,000.00
     IA-3        9,500,000.00   9,500,000.00     53,437.50          0.00      53,437.50          0.00          0.00   9,500,000.00
     IA-4       14,250,000.00  14,250,000.00     80,156.25          0.00      80,156.25          0.00          0.00  14,250,000.00
     IA-5        4,887,000.00   4,887,000.00     27,489.38          0.00      27,489.38          0.00          0.00   4,887,000.00
     IA-6        9,939,000.00   9,939,000.00     55,906.88          0.00      55,906.88          0.00          0.00   9,939,000.00
     I-X *      11,983,709.00   6,330,794.02     35,610.72          0.00      35,610.72          0.00          0.00   6,176,527.75
     I-PO           21,501.00       8,304.08          0.00          9.36           9.36          0.00          0.00       8,294.72
     IIA-1     121,111,453.00  66,062,955.40    357,841.01  2,393,406.26   2,751,247.27          0.00          0.00  63,669,549.14
     IIA-2       1,000,000.00     373,541.84      2,023.35     27,763.42      29,786.77          0.00          0.00     345,778.42
     IIA-3       8,262,000.00   8,262,000.00     44,752.50          0.00      44,752.50          0.00          0.00   8,262,000.00
     IIA-4      14,913,749.00  12,903,061.33     69,891.58     61,335.90     131,227.48          0.00          0.00  12,841,725.43
     IIA-5      46,447,250.00  18,144,513.65     98,282.78  1,348,587.19   1,446,869.97          0.00          0.00  16,795,926.46
     IIA-6       2,127,000.00           0.00          0.00          0.00           0.00          0.00          0.00           0.00
     II-X *      7,513,508.12   3,389,038.59     18,357.29          0.00      18,357.29          0.00          0.00   3,307,093.28
     II-PO         350,133.00     264,761.93          0.00     21,093.86      21,093.86          0.00          0.00     243,668.07

------------------------------------------------------------------------------------------------------------------------------------
TOTALS         333,910,590.00 186,523,290.42  1,079,595.10  6,090,311.48   7,169,906.58          0.00          0.00 180,432,978.94
------------------------------------------------------------------------------------------------------------------------------------
  *Notional Class Balance
</TABLE>


<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
                            FACTOR INFORMATION PER $1000 OF ORIGINAL FACE                                     PASS-THROUGH
                                       PRIOR                                                  CURRENT            RATES
                                   PRINCIPAL                                                PRINCIPAL
     CLASS          CUSIP            BALANCE      INTEREST     PRINCIPAL          TOTAL       BALANCE       CURRENT           NEXT
------------------------------------------------------------------------------------------------------------------------------------

<S>             <C>             <C>               <C>          <C>            <C>        <C>              <C>            <C>
     IA-1       055240CT0         384.261959      2.161474     23.289079      25.450552    360.972880     6.750000%      6.750000%
     IA-2       055240CU7       1,000.000000      5.625000      0.000000       5.625000  1,000.000000     6.750000%      6.750000%
     IA-3       055240CV5       1,000.000000      5.625000      0.000000       5.625000  1,000.000000     6.750000%      6.750000%
     IA-4       055240CW3       1,000.000000      5.625000      0.000000       5.625000  1,000.000000     6.750000%      6.750000%
     IA-5       055240CX1       1,000.000000      5.625001      0.000000       5.625001  1,000.000000     6.750000%      6.750000%
     IA-6       055240CY9       1,000.000000      5.625001      0.000000       5.625001  1,000.000000     6.750000%      6.750000%
     I-X *      055240DF9         528.283357      5.625001      0.000000       5.625001    515.410359     6.750000%      0.000000%
     I-PO       055240DH5         386.218315      0.000000      0.435329       0.435329    385.782987     0.000000%      6.500000%
     IIA-1      055240CZ6         545.472404      2.954642     19.762014      22.716656    525.710390     6.500000%      6.500000%
     IIA-2      055240DA0         373.541840      2.023350     27.763420      29.786770    345.778420     6.500000%      6.500000%
     IIA-3      055240DB8       1,000.000000      5.416667      0.000000       5.416667  1,000.000000     6.500000%      6.500000%
     IIA-4      055240DC6         865.178925      4.686386      4.112708       8.799094    861.066217     6.500000%      6.500000%
     IIA-5      055240DD4         390.647749      2.116009     29.034812      31.150821    361.612936     6.500000%      6.500000%
     IIA-6      055240DE2           0.000000      0.000000      0.000000       0.000000      0.000000     6.500000%      6.500000%
     II-X *     055240DG7         451.059416      2.443238      0.000000       2.443238    440.153019     6.500000%      0.000000%
     II-PO      055240DU6         756.175311      0.000000     60.245278      60.245278    695.930032     0.000000%      0.000000%



------------------------------------------------------------------------------------------------------------------------------------
SELLER:                                    Bank of America                      ADMINISTRATOR:                Eiko Akiyama
SERVICER:                                  Bank of America                                                   Deutsche Bank
LEAD UNDERWRITER:                    Donaldson, Lufkin & Jenrette                                       1761 E. St. Andrew Place
RECORD DATE:                                 May 31, 2001                                                 Santa Ana, CA 92705
DISTRIBUTION DATE:                          June 25, 2001                       FACTOR INFORMATION:          (800) 735-7777
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>

                                    Page 2 of 5 (C) COPYRIGHT 2001 Deutsche Bank


<PAGE>


                          BA MORTGAGE SECURITIES, INC.
                       MORTGAGE PASS-THROUGH CERTIFICATES
                                  SERIES 1998-1

                         STATEMENT TO CERTIFICATEHOLDERS

 Statements are available online at http://www-apps.gis.deutsche-bank.com/invr.
    Statement posting begins 7:00 PM Eastern time the business day prior to
                                 distribution.

<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
                                                     DISTRIBUTIONS IN DOLLARS
                                       PRIOR                                                                               CURRENT
                     ORIGINAL      PRINCIPAL                                                 REALIZED      DEFERRED      PRINCIPAL
     CLASS         FACE VALUE        BALANCE      INTEREST     PRINCIPAL          TOTAL        LOSSES      INTEREST        BALANCE
------------------------------------------------------------------------------------------------------------------------------------
<S>              <C>            <C>              <C>           <C>            <C>                <C>           <C>    <C>
     M           3,776,882.00   3,428,032.80     18,886.73     10,660.94      29,547.67          0.00          0.00   3,417,371.86
     B-1         2,231,794.00   2,025,655.79     11,160.34      6,299.65      17,459.99          0.00          0.00   2,019,356.14
     B-2         1,201,735.00   1,090,737.58      6,009.41      3,392.12       9,401.53          0.00          0.00   1,087,345.46
     B-3         1,030,060.00     934,919.17      5,150.93      2,907.53       8,058.46          0.00          0.00     932,011.64
     B-4           515,029.00     467,458.67      2,575.46      1,453.76       4,029.22          0.00          0.00     466,004.91
     B-5           686,706.32     623,279.17      3,433.95      1,938.35       5,372.30          0.00          0.00     621,340.82
     R-II               50.00           0.00          0.00          0.00           0.00          0.00          0.00           0.00

------------------------------------------------------------------------------------------------------------------------------------
TOTALS           9,442,256.32   8,570,083.18     47,216.82     26,652.35      73,869.17          0.00          0.00   8,543,430.83
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>


<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
                            FACTOR INFORMATION PER $1000 OF ORIGINAL FACE                                     PASS-THROUGH
                                       PRIOR                                                  CURRENT            RATES
                                   PRINCIPAL                                                PRINCIPAL
     CLASS          CUSIP            BALANCE      INTEREST     PRINCIPAL          TOTAL       BALANCE       CURRENT           NEXT
------------------------------------------------------------------------------------------------------------------------------------

<S>             <C>               <C>             <C>           <C>            <C>         <C>            <C>            <C>
     M          055240DJ1         907.635663      5.000614      2.822683       7.823297    904.812981     6.611393%      6.611622%
     B-1        055240DK8         907.635646      5.000614      2.822684       7.823298    904.812962     6.611393%      6.611622%
     B-2        055240DL6         907.635693      5.000612      2.822686       7.823297    904.813008     6.611393%      6.611622%
     B-3        055240DM4         907.635643      5.000612      2.822680       7.823292    904.812962     6.611393%      6.611622%
     B-4        055240DN2         907.635628      5.000612      2.822676       7.823288    904.812952     6.611393%      6.611622%
     B-5        055240DP7         907.635698      5.000609      2.822677       7.823286    904.813021     6.611393%      6.611622%
     R-II       055240DR3           0.000000      0.000000      0.000000       0.000000      0.000000     6.750000%      6.750000%


------------------------------------------------------------------------------------------------------------------------------------
SELLER:                                    Bank of America                      ADMINISTRATOR:                Eiko Akiyama
SERVICER:                                  Bank of America                                                   Deutsche Bank
LEAD UNDERWRITER:                    Donaldson, Lufkin & Jenrette                                       1761 E. St. Andrew Place
RECORD DATE:                                 May 31, 2001                                                 Santa Ana, CA 92705
DISTRIBUTION DATE:                          June 25, 2001                       FACTOR INFORMATION:           (800) 735-7777
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
                                    Page 3 of 5 (C) COPYRIGHT 2001 Deutsche Bank


<PAGE>


                          BA MORTGAGE SECURITIES, INC.
                       MORTGAGE PASS-THROUGH CERTIFICATES
                                  SERIES 1998-1

                         STATEMENT TO CERTIFICATEHOLDERS
<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
Distribution Date:            June 25, 2001
------------------------------------------------------------------------------------------------------------------------------------

MORTGAGE POOL INFORMATION:                                                  GROUP I                     GROUP II
--------------------------                                                  -------                     --------

<S>                                                                       <C>                         <C>
                BEGINNING BALANCE OF POOL                                 84,331,052.09               110,762,321.74
                LESS:         SCHEDULED PRINCIPAL                            (89,788.85)                (526,436.61)
                              PRINCIPAL PREPAYMENTS                       (2,152,401.72)              (3,348,336.66)
                              REPURCHASES                                          0.00                        0.00
                              LIQUIDATIONS                                         0.00                        0.00
                              OTHER UNSCHEDULED PRINCIPAL                          0.00                        0.00
                                                                          -------------               --------------
                ENDING BALANCE OF POOL                                    82,088,861.52               106,887,548.47
                                                                          =============               ==============

                BEGINNING NUMBER OF LOANS IN POOL                                   270                         372
                ENDING NUMBER OF LOANS IN POOL                                      263                         363

                WEIGHTED AVERAGE REMAINING TERM TO MATURITY                         308                         135
                WEIGHTED AVERAGE NET CONTRACT RATE                            7.506063%                   7.065906%

                CURRENT REALIZED LOSSES ON THE POOL                                0.00                        0.00
                CUMULATIVE REALIZED LOSSES ON THE POOL                             0.00                        0.00

                BEGINNING POOL BALANCE OF PREMIUM LOANS                   83,162,180.54               101,722,414.41
                STRIPPED INTEREST RATE                                        0.513850%                   0.216557%
</TABLE>

<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
DELINQUENT, BANKRUPTCY,                                                                     LOANS         LOANS         LOANS
FORECLOSURE, AND REO                           30 TO 59      60 TO 89       90 PLUS          IN            IN             IN
LOAN INFORMATION                                 DAYS          DAYS           DAYS       BANKRUPTCY    FORECLOSURE       REO
------------------------------------------------------------------------------------------------------------------------------------

<S>                                                <C>        <C>               <C>        <C>              <C>            <C>
GROUP I         PRINCIPAL BALANCE                     0.00    234,480.34           0.00    249,999.87          0.00           0.00
                     PERCENTAGE OF GROUP BAL.      0.0000%       0.1241%        0.0000%       0.1323%       0.0000%        0.0000%
                NUMBER OF LOANS                          0             1              0             1             0              0
                     PERCENTAGE OF LOANS           0.0000%       0.1597%        0.0000%       0.1597%       0.0000%        0.0000%
GROUP II        PRINCIPAL BALANCE                     0.00          0.00           0.00          0.00          0.00           0.00
                     PERCENTAGE OF GROUP BAL.      0.0000%       0.0000%        0.0000%       0.0000%       0.0000%        0.0000%
                NUMBER OF LOANS                          0             0              0             0             0              0
                     PERCENTAGE OF LOANS           0.0000%       0.0000%        0.0000%       0.0000%       0.0000%        0.0000%
------------------------------------------------------------------------------------------------------------------------------------
                GROUP I BOOK VALUE OF REO PROPERTIES                                                             NA
                GROUP II BOOK VALUE OF REO PROPERTIES                                                            NA
</TABLE>

<TABLE>
<CAPTION>

SERVICING INFORMATION:                                                      GROUP I                     GROUP II
----------------------                                                      -------                     --------
<S>                                                                           <C>                         <C>
                SERVICING FEES ACCRUED DURING THE CURRENT DUE PERIOD          17,568.97                   35,311.01
                PLUS:         ADDITIONAL SERVICING COMPENSATION                    0.00                        0.00
                LESS:         AMTS. TO COVER PREPAYMENT INT. SHORTFALL        (5,772.19)                 (11,585.14)
                              DELINQUENT SERVICING FEES                       (1,212.98)                  (1,863.65)
                                                                          -------------               --------------
                SERVICING FEES COLLECTED FOR THE CURRENT DUE PERIOD           10,583.80                   21,862.22
                                                                          =============               ==============

                ADVANCED PRINCIPAL                                             5,990.88                   26,189.66
                ADVANCED INTEREST                                             34,679.91                   30,971.23
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
                                    Page 4 of 5 (C) COPYRIGHT 2001 Deutsche Bank


<PAGE>


                          BA MORTGAGE SECURITIES, INC.
                       MORTGAGE PASS-THROUGH CERTIFICATES
                                  SERIES 1998-1

                         STATEMENT TO CERTIFICATEHOLDERS

<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
Distribution Date:            June 25, 2001
------------------------------------------------------------------------------------------------------------------------------------

                                                 OTHER                                   CUMULATIVE
                                PREPAYMENT    UNSCHEDULED                 CERTIFICATE      UNPAID                     CUMULATIVE
                                PRINCIPAL      PRINCIPAL                    INTEREST      INTEREST                     REALIZED
     CLASS                     DISTRIBUTED    DISTRIBUTED                  SHORTFALL      SHORTFALL                     LOSSES
------------------------------------------------------------------------------------------------------------------------------------
<S>                             <C>                   <C>                          <C>           <C>                          <C>
       CLASS IA-1               2,152,392.72          0.00                         0.00          0.00                         0.00
       CLASS IA-2                       0.00          0.00                         0.00          0.00                         0.00
       CLASS IA-3                       0.00          0.00                         0.00          0.00                         0.00
       CLASS IA-4                       0.00          0.00                         0.00          0.00                         0.00
       CLASS IA-5                       0.00          0.00                         0.00          0.00                         0.00
       CLASS IA-6                       0.00          0.00                         0.00          0.00                         0.00
       CLASS I-X                        0.00          0.00                         0.00          0.00                         0.00
       CLASS I-PO                       9.00          0.00                         0.00          0.00                         0.00
       CLASS IIA-1              2,080,358.68          0.00                         0.00          0.00                         0.00
       CLASS IIA-2                 24,132.08          0.00                         0.00          0.00                         0.00
       CLASS IIA-3                      0.00          0.00                         0.00          0.00                         0.00
       CLASS IIA-4                 53,313.42          0.00                         0.00          0.00                         0.00
       CLASS IIA-5              1,172,197.60          0.00                         0.00          0.00                         0.00
       CLASS IIA-6                      0.00          0.00                         0.00          0.00                         0.00
       CLASS II-X                       0.00          0.00                         0.00          0.00                         0.00
       CLASS II-PO                 18,334.87          0.00                         0.00          0.00                         0.00
       CLASS M                          0.00          0.00                         0.00          0.00                         0.00
       CLASS B-1                        0.00          0.00                         0.00          0.00                         0.00
       CLASS B-2                        0.00          0.00                         0.00          0.00                         0.00
       CLASS B-3                        0.00          0.00                         0.00          0.00                         0.00
       CLASS B-4                        0.00          0.00                         0.00          0.00                         0.00
       CLASS B-5                        0.00          0.00                         0.00          0.00                         0.00
------------------------------------------------------------------------------------------------------------------------------------
    TOTALS                      5,500,738.38          0.00                         0.00          0.00                         0.00
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>

<TABLE>
<CAPTION>
<S>                                                                                                    <C>
                OTHER REPORTING ITEMS:

                GROUP I PERCENTAGE                                                                           95.47%
                GROUP I PREPAYMENT PERCENTAGE                                                               100.00%
                GROUP II PERCENTAGE                                                                          95.70%
                GROUP II PREPAYMENT PERCENTAGE                                                              100.00%

                SUBORDINATE PRINCIPAL DISTRIBUTION AMOUNT                                                 26,652.36
                HAS THE CREDIT SUPPORT DEPLETION DATE OCCURRED                                                   No

                BANKRUPTCY AMOUNT                                                                        100,000.00
                FRAUD LOSS AMOUNT                                                                        119,926.36
                SPECIAL HAZARD AMOUNT                                                                  4,500,664.47
                EXTRAORDINARY LOSSES FOR THE PRIOR PERIOD                                                      0.00

                GROUP I EXTRAORDINARY LOSSES                                                                   0.00
                GROUP II EXTRAORDINARY LOSSES                                                                  0.00
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
                                    Page 5 of 5 (C) COPYRIGHT 2001 Deutsche Bank


<PAGE>
                                                  BA MORTGAGE SECURITIES, INC.

                                              MORTGAGE PASS-THROUGH CERTIFICATES
                                                        SERIES 1998-1

                                                STATEMENT TO CERTIFICATEHOLDERS

Statements are available online at http://www-apps.gis.deutsche-bank.com/invr.
Statement posting begins 7:00 PM Eastern time the business day prior to
distribution.

<TABLE>
                                                    DISTRIBUTIONS IN DOLLARS

                                      PRIOR                                                                              CURRENT
                     ORIGINAL     PRINCIPAL                                                 REALIZED      DEFERRED     PRINCIPAL
     CLASS         FACE VALUE       BALANCE      INTEREST     PRINCIPAL         TOTAL         LOSSES      INTEREST       BALANCE
-----------------------------------------------------------------------------------------------------------------------------------

<S>            <C>             <C>               <C>          <C>           <C>                <C>           <C>    <C>
      P1-M          21,501.00       8,294.72          0.00         11.71         11.71         0.00          0.00         8,283.01
      P2-M         350,133.00     243,668.07          0.00      1,226.94      1,226.94         0.00          0.00       242,441.13
      X1-M *   142,084,361.67  80,921,505.02     34,742.97          0.00     34,742.97         0.00          0.00    80,570,709.81
      X2-M *   187,559,494.52  98,508,091.59     17,913.42          0.00     17,913.42         0.00          0.00    95,587,372.54
      Y1            71,698.81      39,919.19        224.56          0.00        224.56         0.00          0.00        39,919.19
      Y2            99,676.65      49,488.12        268.06        185.74        453.80         0.00          0.00        49,302.38
      Z1       143,556,266.44  82,040,647.67    461,478.64    352,339.45    813,818.09         0.00          0.00    81,688,308.22
      Z2       199,253,620.42 106,594,392.00    577,386.28  2,961,577.08  3,538,963.36         0.00          0.00   103,632,814.92
      R-I               50.00           0.00          0.00          0.00          0.00         0.00          0.00             0.00

-----------------------------------------------------------------------------------------------------------------------------------
TOTALS         343,352,946.32 188,976,409.77  1,092,013.93  3,315,340.92  4,407,354.85           0.00          0.00 185,661,068.85
-----------------------------------------------------------------------------------------------------------------------------------
</TABLE>
*Notional Class Balance

<TABLE>
<CAPTION>
                           FACTOR INFORMATION PER $1000 OF ORIGINAL FACE                                    PASS-THROUGH
                                      PRIOR                                                  CURRENT            RATES
                                  PRINCIPAL                                                PRINCIPAL
     CLASS          CUSIP           BALANCE      INTEREST     PRINCIPAL         TOTAL        BALANCE       CURRENT          NEXT
-----------------------------------------------------------------------------------------------------------------------------------
<S>               <C>              <C>            <C>           <C>           <C>          <C>            <C>           <C>
      P1-M                        385.782987      0.000000      0.544626      0.544626     385.238361     0.000000%     0.000000%
      P2-M                        695.930032      0.000000      3.504211      3.504211     692.425821     0.000000%     0.000000%
      X1-M *                      569.531397      0.244524      0.000000      0.244524     567.062475     0.515210%     0.515210%
      X2-M *                      525.209837      0.095508      0.000000      0.095508     509.637610     0.218217%     0.218217%
      Y1                          556.762220      3.131991      0.000000      3.131991     556.762220     6.750000%     6.750000%
      Y2                          496.486597      2.689296      1.863431      4.552726     494.623171     6.500000%     6.500000%
      Z1                          571.487750      3.214619      2.454365      5.668983     569.033385     6.750000%     6.750000%
      Z2                          534.968407      2.897746     14.863354     17.761099     520.105054     6.500000%     6.500000%
      R-I         055240DQ5         0.000000      0.000000      0.000000      0.000000       0.000000     6.750000%     6.750000%



SELLER:                                    Bank of America                          ADMINISTRATOR:          Eiko Akiyama
SERVICER:                                  Bank of America                                                  Deutsche Bank
LEAD UNDERWRITER:                   Donaldson, Lufkin & Jenrette                                      1761 E. St. Andrew Place
RECORD DATE:                                June 29, 2001                                                Santa Ana, CA 92705
DISTRIBUTION DATE:                          July 25, 2001                         FACTOR INFORMATION:    (800) 735-7777
</TABLE>

                               Page 1 of 5     (C) COPYRIGHT 2001 Deutsche Bank
<PAGE>

                          BA MORTGAGE SECURITIES, INC.
                       MORTGAGE PASS-THROUGH CERTIFICATES
                                  SERIES 1998-1

                         STATEMENT TO CERTIFICATEHOLDERS

Statements are available online at http://www-apps.gis.deutsche-bank.com/invr.
Statement posting begins 7:00 PM Eastern time the business day prior to
distribution.

<TABLE>

                                                    DISTRIBUTIONS IN DOLLARS
                                      PRIOR                                                                              CURRENT
                     ORIGINAL     PRINCIPAL                                                 REALIZED      DEFERRED     PRINCIPAL
     CLASS         FACE VALUE       BALANCE      INTEREST     PRINCIPAL         TOTAL         LOSSES      INTEREST       BALANCE
-----------------------------------------------------------------------------------------------------------------------------------
<S>            <C>            <C>              <C>           <C>           <C>                  <C>           <C>  <C>
      IA-1      96,101,504.00  34,690,036.70    195,131.46    348,148.23    543,279.69           0.00          0.00 34,341,888.47
      IA-2       5,000,000.00   5,000,000.00     28,125.00          0.00     28,125.00           0.00          0.00  5,000,000.00
      IA-3       9,500,000.00   9,500,000.00     53,437.50          0.00     53,437.50           0.00          0.00  9,500,000.00
      IA-4      14,250,000.00  14,250,000.00     80,156.25          0.00     80,156.25           0.00          0.00 14,250,000.00
      IA-5       4,887,000.00   4,887,000.00     27,489.38          0.00     27,489.38           0.00          0.00  4,887,000.00
      IA-6       9,939,000.00   9,939,000.00     55,906.88          0.00     55,906.88           0.00          0.00  9,939,000.00
      I-X *     11,983,709.00   6,176,527.75     34,742.96          0.00     34,742.96           0.00          0.00  6,140,913.46
      I-PO          21,501.00       8,294.72          0.00         11.71         11.71           0.00          0.00      8,283.01
      IIA-1    121,111,453.00  63,669,549.14    344,876.72  1,835,986.41  2,180,863.13           0.00          0.00 61,833,562.73
      IIA-2      1,000,000.00     345,778.42      1,872.97     20,990.71     22,863.68           0.00          0.00    324,787.71
      IIA-3      8,262,000.00    ,262,000.00     44,752.50          0.00     44,752.50           0.00          0.00  8,262,000.00
      IIA-4     14,913,749.00  12,841,725.43     69,559.35     62,253.10    131,812.45           0.00          0.00 12,779,472.33
      IIA-5     46,447,250.00  16,795,926.46     90,977.93  1,019,608.20  1,110,586.13           0.00          0.00 15,776,318.26
      IIA-6      2,127,000.00           0.00          0.00          0.00          0.00           0.00          0.00          0.00
      II-X *     7,513,508.12   3,307,093.28     17,913.42          0.00     17,913.42           0.00          0.00  3,186,622.98
      II-PO        350,133.00     243,668.07          0.00      1,226.94      1,226.94           0.00          0.00    242,441.13

-----------------------------------------------------------------------------------------------------------------------------------
TOTALS         333,910,590.00 180,432,978.94  1,044,942.32  3,288,225.30  4,333,167.62           0.00          0.00 177,144,753.64
-----------------------------------------------------------------------------------------------------------------------------------
  *Notional Class Balance
</TABLE>

<TABLE>
<CAPTION>
                           FACTOR INFORMATION PER $1000 OF ORIGINAL FACE                                    PASS-THROUGH
                                      PRIOR                                                  CURRENT            RATES
                                  PRINCIPAL                                                PRINCIPAL
     CLASS          CUSIP           BALANCE      INTEREST     PRINCIPAL         TOTAL        BALANCE       CURRENT          NEXT
-----------------------------------------------------------------------------------------------------------------------------------
<S>                 <C>        <C>                <C>          <C>           <C>         <C>               <C>         <C>

      IA-1          055240CT0     360.972880      2.030472      3.622714      5.653186     357.350167     6.750000%     6.750000%
      IA-2          055240CU7   1,000.000000      5.625000      0.000000      5.625000   1,000.000000     6.750000%     6.750000%
      IA-3          055240CV5   1,000.000000      5.625000      0.000000      5.625000   1,000.000000     6.750000%     6.750000%
      IA-4          055240CW3   1,000.000000      5.625000      0.000000      5.625000   1,000.000000     6.750000%     6.750000%
      IA-5          055240CX1   1,000.000000      5.625001      0.000000      5.625001   1,000.000000     6.750000%     6.750000%
      IA-6          055240CY9   1,000.000000      5.625001      0.000000      5.625001   1,000.000000     6.750000%     6.750000%
      I-X *         055240DF9     515.410359      5.624999      0.000000      5.624999     512.438466     6.750000%     0.000000%
      I-PO          055240DH5     385.782987      0.000000      0.544626      0.544626     385.238361     0.000000%     6.500000%
      IIA-1         055240CZ6     525.710390      2.847598     15.159478     18.007076     510.550912     6.500000%     6.500000%
      IIA-2         055240DA0     345.778420      1.872970     20.990710     22.863680     324.787710     6.500000%     6.500000%
      IIA-3         055240DB8   1,000.000000      5.416667      0.000000      5.416667   1,000.000000     6.500000%     6.500000%
      IIA-4         055240DC6     861.066217      4.664109      4.174209      8.838318     856.892008     6.500000%     6.500000%
      IIA-5         055240DD4     361.612936      1.958737     21.951961     23.910697     339.660976     6.500000%     6.500000%
      IIA-6         055240DE2       0.000000      0.000000      0.000000      0.000000       0.000000     6.500000%     6.500000%
      II-X *        055240DG7     440.153019      2.384162      0.000000      2.384162     424.119190     6.500000%     0.000000%
      II-PO         055240DU6     695.930032      0.000000      3.504211      3.504211     692.425821     0.000000%     0.000000%



SELLER:                                    Bank of America                     ADMINISTRATOR:               Eiko Akiyama
SERVICER:                                  Bank of America                                                  Deutsche Bank
LEAD UNDERWRITER:                   Donaldson, Lufkin & Jenrette                                      1761 E. St. Andrew Place
RECORD DATE:                                June 29, 2001                                                Santa Ana, CA 92705
DISTRIBUTION DATE:                          July 25, 2001                           FACTOR INFORMATION:    (800) 735-7777
</TABLE>

                                 Page 2 of 5    (C) COPYRIGHT 2001 Deutsche Bank

<PAGE>

                          BA MORTGAGE SECURITIES, INC.
                       MORTGAGE PASS-THROUGH CERTIFICATES
                                  SERIES 1998-1

                         STATEMENT TO CERTIFICATEHOLDERS

Statements are available online at http://www-apps.gis.deutsche-bank.com/invr.
Statement posting begins 7:00 PM Eastern time the business day prior to
distribution.
<TABLE>
<CAPTION>

                                                    DISTRIBUTIONS IN DOLLARS

                                      PRIOR                                                                              CURRENT
                     ORIGINAL     PRINCIPAL                                                 REALIZED      DEFERRED     PRINCIPAL
     CLASS         FACE VALUE       BALANCE      INTEREST     PRINCIPAL         TOTAL         LOSSES      INTEREST       BALANCE
-----------------------------------------------------------------------------------------------------------------------------------
<S>              <C>            <C>              <C>            <C>          <C>                 <C>        <C>      <C>

      M          3,776,882.00   3,417,371.86     18,828.64     10,846.25     29,674.89           0.00       0.00     3,406,525.61
      B-1        2,231,794.00   2,019,356.14     11,126.02      6,409.15     17,535.17           0.00       0.00     2,012,946.99
      B-2        1,201,735.00   1,087,345.46      5,990.93      3,451.08      9,442.01           0.00       0.00     1,083,894.38
      B-3        1,030,060.00     932,011.64      5,135.09      2,958.07      8,093.16           0.00       0.00       929,053.57
      B-4          515,029.00     466,004.91      2,567.54      1,479.03      4,046.57           0.00       0.00       464,525.88
      B-5          686,706.32     621,340.82      3,423.39      1,972.04      5,395.43           0.00       0.00       619,368.78
      R-II              50.00           0.00          0.00          0.00          0.00           0.00       0.00             0.00


-----------------------------------------------------------------------------------------------------------------------------------
TOTALS           9,442,256.32   8,543,430.83     47,071.61     27,115.62     74,187.23           0.00          0.00  8,516,315.21
-----------------------------------------------------------------------------------------------------------------------------------
</TABLE>

<TABLE>
<CAPTION>

                           FACTOR INFORMATION PER $1000 OF ORIGINAL FACE                                    PASS-THROUGH
                                      PRIOR                                                  CURRENT            RATES
                                  PRINCIPAL                                                PRINCIPAL
     CLASS          CUSIP           BALANCE      INTEREST     PRINCIPAL         TOTAL        BALANCE       CURRENT          NEXT
-----------------------------------------------------------------------------------------------------------------------------------
<S>                 <C>            <C>            <C>           <C>           <C>          <C>            <C>           <C>

      M             055240DJ1     904.812981      4.985234      2.871747      7.856981     901.941234     6.611622%     6.611854%
      B-1           055240DK8     904.812962      4.985236      2.871748      7.856984     901.941214     6.611622%     6.611854%
      B-2           055240DL6     904.813008      4.985234      2.871748      7.856982     901.941260     6.611622%     6.611854%
      B-3           055240DM4     904.812962      4.985234      2.871745      7.856979     901.941217     6.611622%     6.611854%
      B-4           055240DN2     904.812952      4.985234      2.871741      7.856975     901.941211     6.611622%     6.611854%
      B-5           055240DP7     904.813021      4.985232      2.871737      7.856969     901.941284     6.611622%     6.611854%
      R-II          055240DR3       0.000000      0.000000      0.000000      0.000000       0.000000     6.750000%     6.750000%



SELLER:                                    Bank of America                     ADMINISTRATOR:               Eiko Akiyama
SERVICER:                                  Bank of America                                                  Deutsche Bank
LEAD UNDERWRITER:                   Donaldson, Lufkin & Jenrette                                      1761 E. St. Andrew Place
RECORD DATE:                                June 29, 2001                                                Santa Ana, CA 92705
DISTRIBUTION DATE:                          July 25, 2001                           FACTOR INFORMATION:    (800) 735-7777
</TABLE>

                            Page 3 of 5        (C) COPYRIGHT 2001 Deutsche Bank
<PAGE>


                          BA MORTGAGE SECURITIES, INC.
                       MORTGAGE PASS-THROUGH CERTIFICATES
                                  SERIES 1998-1

                         STATEMENT TO CERTIFICATEHOLDERS

Distribution Date:            July 25, 2001

<TABLE>
<CAPTION>
MORTGAGE POOL INFORMATION:                                                 GROUP I                     GROUP II
--------------------------                                                 -------                     --------
<S>                                                                      <C>                         <C>

                BEGINNING BALANCE OF POOL                                82,088,861.52                106,887,548.47
                LESS:         SCHEDULED PRINCIPAL                           (90,195.61)                 (518,162.62)
                              PRINCIPAL PREPAYMENTS                        (262,155.57)               (2,444,827.13)
                              REPURCHASES                                         0.00                         0.00
                              LIQUIDATIONS                                        0.00                         0.00
                              OTHER UNSCHEDULED PRINCIPAL                         0.00                         0.00
                                                                        --------------               --------------
                ENDING BALANCE OF POOL                                    81,736,510.34               103,924,558.72
                                                                        ==============               ==============

                BEGINNING NUMBER OF LOANS IN POOL                                  263                          363
                ENDING NUMBER OF LOANS IN POOL                                     262                          355

                WEIGHTED AVERAGE REMAINING TERM TO MATURITY                        307                          134
                WEIGHTED AVERAGE NET CONTRACT RATE                            7.507201%                    7.068290%

                CURRENT REALIZED LOSSES ON THE POOL                               0.00                         0.00
                CUMULATIVE REALIZED LOSSES ON THE POOL                            0.00                         0.00

                BEGINNING POOL BALANCE OF PREMIUM LOANS                  80,921,505.02                98,508,091.59
                STRIPPED INTEREST RATE                                        0.515210%                    0.218217%
</TABLE>

<TABLE>
<CAPTION>
DELINQUENT, BANKRUPTCY,                                                                        LOANS          LOANS         LOANS
FORECLOSURE, AND REO                               30 TO 59      60 TO 89       90 PLUS          IN            IN            IN
LOAN INFORMATION                                     DAYS          DAYS          DAYS        BANKRUPTCY    FORECLOSURE       REO
<S>                                             <C>              <C>        <C>                <C>          <C>           <C>
GROUP I         PRINCIPAL BALANCE               569,166.71          0.00    249,732.57           0.00          0.00          0.00
                     PERCENTAGE OF GROUP BAL.       0.3066%       0.0000%       0.1345%        0.0000%       0.0000%       0.0000%
                NUMBER OF LOANS                          2             0             1              0             0             0
                     PERCENTAGE OF LOANS            0.3241%       0.0000%       0.1621%        0.0000%       0.0000%       0.0000%
GROUP II        PRINCIPAL BALANCE                     0.00          0.00          0.00           0.00          0.00          0.00
                     PERCENTAGE OF GROUP BAL.       0.0000%       0.0000%       0.0000%        0.0000%       0.0000%       0.0000%
                NUMBER OF LOANS                          0             0             0              0             0             0
                     PERCENTAGE OF LOANS            0.0000%       0.0000%       0.0000%        0.0000%       0.0000%       0.0000%

                GROUP I BOOK VALUE OF REO PROPERTIES                                                            NA
                GROUP II BOOK VALUE OF REO PROPERTIES                                                           NA
</TABLE>

<TABLE>
<CAPTION>
SERVICING INFORMATION:                                                     GROUP I                     GROUP II
----------------------                                                     -------                     --------
<S>                                                                     <C>                          <C>

                SERVICING FEES ACCRUED DURING THE CURRENT DUE PERIOD         17,101.85                    34,025.74
                PLUS:         ADDITIONAL SERVICING COMPENSATION                   0.00                         0.00
                LESS:         AMTS. TO COVER PREPAYMENT INT. SHORTFALL         (592.07)                   (8,893.17)
                              DELINQUENT SERVICING FEES                      (4,038.08)                   (6,839.31)
                                                                        --------------               --------------
                SERVICING FEES COLLECTED FOR THE CURRENT DUE PERIOD          12,471.70                    18,293.26
                                                                        ==============               ==============

                ADVANCED PRINCIPAL                                           20,617.90                   101,355.44
                ADVANCED INTEREST                                           116,795.85                   116,730.20
</TABLE>

                                Page 4 of 5     (C) COPYRIGHT 2001 Deutsche Bank
<PAGE>


                          BA MORTGAGE SECURITIES, INC.
                       MORTGAGE PASS-THROUGH CERTIFICATES
                                  SERIES 1998-1

                         STATEMENT TO CERTIFICATEHOLDERS

Distribution Date:            July 25, 2001
<TABLE>
<CAPTION>

                                                     OTHER                                   CUMULATIVE
                               PREPAYMENT         UNSCHEDULED                 CERTIFICATE      UNPAID                    CUMULATIVE
                                PRINCIPAL          PRINCIPAL                   INTEREST       INTEREST                    REALIZED
     CLASS                     DISTRIBUTED        DISTRIBUTED                  SHORTFALL     SHORTFALL                     LOSSES
------------------------------------------------------------------------------------------------------------------------------------
<S>                           <C>                     <C>                         <C>            <C>                         <C>
     CLASS IA-1                   262,146.75          0.00                        0.00           0.00                        0.00
     CLASS IA-2                         0.00          0.00                        0.00           0.00                        0.00
     CLASS IA-3                         0.00          0.00                        0.00           0.00                        0.00
     CLASS IA-4                         0.00          0.00                        0.00           0.00                        0.00
     CLASS IA-5                         0.00          0.00                        0.00           0.00                        0.00
     CLASS IA-6                         0.00          0.00                        0.00           0.00                        0.00
     CLASS I-X                          0.00          0.00                        0.00           0.00                        0.00
     CLASS I-PO                         8.82          0.00                        0.00           0.00                        0.00
     CLASS IIA-1                1,526,724.35          0.00                        0.00           0.00                        0.00
     CLASS IIA-2                   17,454.94          0.00                        0.00           0.00                        0.00
     CLASS IIA-3                        0.00          0.00                        0.00           0.00                        0.00
     CLASS IIA-4                   51,766.90          0.00                        0.00           0.00                        0.00
     CLASS IIA-5                  847,860.67          0.00                        0.00           0.00                        0.00
     CLASS IIA-6                        0.00          0.00                        0.00           0.00                        0.00
     CLASS II-X                         0.00          0.00                        0.00           0.00                        0.00
     CLASS II-PO                    1,020.27          0.00                        0.00           0.00                        0.00
     CLASS M                            0.00          0.00                        0.00           0.00                        0.00
     CLASS B-1                          0.00          0.00                        0.00           0.00                        0.00
     CLASS B-2                          0.00          0.00                        0.00           0.00                        0.00
     CLASS B-3                          0.00          0.00                        0.00           0.00                        0.00
     CLASS B-4                          0.00          0.00                        0.00           0.00                        0.00
     CLASS B-5                          0.00          0.00                        0.00           0.00                        0.00
------------------------------------------------------------------------------------------------------------------------------------
    TOTALS                      2,706,982.70          0.00                        0.00           0.00                        0.00
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>

<TABLE>
<CAPTION>
<S>                                                                                                  <C>
                OTHER REPORTING ITEMS:

                GROUP I PERCENTAGE                                                                            95.35%
                GROUP I PREPAYMENT PERCENTAGE                                                                100.00%
                GROUP II PERCENTAGE                                                                           95.57%
                GROUP II PREPAYMENT PERCENTAGE                                                               100.00%

                SUBORDINATE PRINCIPAL DISTRIBUTION AMOUNT                                                 27,115.63
                HAS THE CREDIT SUPPORT DEPLETION DATE OCCURRED                                                   No

                BANKRUPTCY AMOUNT                                                                        100,000.00
                FRAUD LOSS AMOUNT                                                                        119,926.36
                SPECIAL HAZARD AMOUNT                                                                  4,500,664.47
                EXTRAORDINARY LOSSES FOR THE PRIOR PERIOD                                                      0.00

                GROUP I EXTRAORDINARY LOSSES                                                                   0.00
                GROUP II EXTRAORDINARY LOSSES                                                                  0.00
</TABLE>

                               Page 5 of 5      (C) COPYRIGHT 2001 Deutsche Bank
<PAGE>

                          BA MORTGAGE SECURITIES, INC.
                       MORTGAGE PASS-THROUGH CERTIFICATES
                                  SERIES 1998-1



                         STATEMENT TO CERTIFICATEHOLDERS

 Statements are available online at http://www-apps.gis.deutsche-bank.com/invr.
    Statement posting begins 7:00 PM Eastern time the business day prior to
                                 distribution.
<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
                                                     DISTRIBUTIONS IN DOLLARS
                                       PRIOR                                                                               CURRENT
                     ORIGINAL      PRINCIPAL                                                 REALIZED      DEFERRED      PRINCIPAL
CLASS              FACE VALUE        BALANCE      INTEREST     PRINCIPAL          TOTAL        LOSSES      INTEREST        BALANCE
------------------------------------------------------------------------------------------------------------------------------------
<S>            <C>            <C>               <C>         <C>            <C>                 <C>           <C>     <C>

P1-M               21,501.00        8,283.01         0.00           9.42           9.42        0.00          0.00          8,273.59
P2-M              350,133.00      242,441.13         0.00       1,228.01       1,228.01        0.00          0.00        241,213.12
X1-M *        142,084,361.67   80,570,709.81    34,542.64           0.00      34,542.64        0.00          0.00     78,401,284.33
X2-M *        187,559,494.52   95,587,372.54    17,260.87           0.00      17,260.87        0.00          0.00     93,238,675.73
Y1                 71,698.81       39,919.19       224.57       1,225.99       1,450.56        0.00          0.00         38,693.20
Y2                 99,676.65       49,302.38       267.05       1,697.86       1,964.91        0.00          0.00         47,604.52
Z1            143,556,266.44   81,688,308.22   459,496.73   2,169,686.06   2,629,182.79        0.00          0.00     79,518,622.16
Z2            199,253,620.42  103,632,814.92   561,344.40   2,387,980.10   2,949,324.50        0.00          0.00    101,244,834.82
R-I                    50.00            0.00         0.00           0.00           0.00        0.00          0.00              0.00





------------------------------------------------------------------------------------------------------------------------------------
TOTALS        343,352,946.32  185,661,068.85 1,073,136.26   4,561,827.44   5,634,963.70        0.00          0.00    181,099,241.41
------------------------------------------------------------------------------------------------------------------------------------
  *Notional Class Balance
</TABLE>


<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
                            FACTOR INFORMATION PER $1000 OF ORIGINAL FACE                                     PASS-THROUGH
                                       PRIOR                                                  CURRENT            RATES
                                   PRINCIPAL                                                PRINCIPAL
CLASS               CUSIP            BALANCE      INTEREST     PRINCIPAL        TOTAL         BALANCE       CURRENT        NEXT
------------------------------------------------------------------------------------------------------------------------------------
<S>                <C>            <C>            <C>           <C>            <C>            <C>           <C>           <C>

P1-M                              385.238361     0.000000       0.438119       0.438119      384.800242    0.00000       0.000000%
P2-M                              692.425821     0.000000       3.507267       3.507267      688.918554    0.00000       0.000000%
X1-M *                            567.062475     0.243114       0.000000       0.243114      551.793902    0.51446       0.514469%
X2-M *                            509.637610     0.092029       0.000000       0.092029      497.115201    0.21669       0.216692%
Y1                                556.762220     3.132130      17.099145      20.231275      539.663052    6.75000       6.750000%
Y2                                494.623171     2.679163      17.033655      19.712819      477.589493    6.50000       6.500000%
Z1                                569.033385     3.200813      15.113837      18.314650      553.919548    6.75000       6.750000%
Z2                                520.105054     2.817236      11.984626      14.801862      508.120428    6.50000       6.500000%
R-I                055240DQ5        0.000000     0.000000       0.000000       0.000000        0.000000    6.75000       6.750000%




------------------------------------------------------------------------------------------------------------------------------------
SELLER:                                    Bank of America                      ADMINISTRATOR:                Eiko Akiyama
SERVICER:                                  Bank of America                                                   Deutsche Bank
LEAD UNDERWRITER:                    Donaldson, Lufkin & Jenrette                                       1761 E. St. Andrew Place
RECORD DATE:                                July 31, 2001                                                  Santa Ana, CA 92705
DISTRIBUTION DATE:                         August 27, 2001                      FACTOR INFORMATION:         (800) 735-7777
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>

                                    Page 1 of 5 (C) COPYRIGHT 2001 Deutsche Bank
<PAGE>


                          BA MORTGAGE SECURITIES, INC.
                       MORTGAGE PASS-THROUGH CERTIFICATES
                                  SERIES 1998-1

                         STATEMENT TO CERTIFICATEHOLDERS

 Statements are available online at http://www-apps.gis.deutsche-bank.com/invr.
    Statement posting begins 7:00 PM Eastern time the business day prior to
                                 distribution.
<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
                                                     DISTRIBUTIONS IN DOLLARS
                                       PRIOR                                                                               CURRENT
                     ORIGINAL      PRINCIPAL                                                 REALIZED      DEFERRED      PRINCIPAL
 CLASS             FACE VALUE        BALANCE      INTEREST     PRINCIPAL          TOTAL        LOSSES      INTEREST        BALANCE
------------------------------------------------------------------------------------------------------------------------------------
<S>            <C>            <C>               <C>         <C>            <C>                 <C>           <C>    <C>
IA-1           96,101,504.00   34,341,888.47   193,173.12   2,166,784.12   2,359,957.24        0.00          0.00     32,175,104.35
IA-2            5,000,000.00    5,000,000.00    28,125.00           0.00      28,125.00        0.00          0.00      5,000,000.00
IA-3            9,500,000.00    9,500,000.00    53,437.50           0.00      53,437.50        0.00          0.00      9,500,000.00
IA-4           14,250,000.00   14,250,000.00    80,156.25           0.00      80,156.25        0.00          0.00     14,250,000.00
IA-5            4,887,000.00    4,887,000.00    27,489.38           0.00      27,489.38        0.00          0.00      4,887,000.00
IA-6            9,939,000.00    9,939,000.00    55,906.88           0.00      55,906.88        0.00          0.00      9,939,000.00
I-X *          11,983,709.00    6,140,913.46    34,542.63           0.00      34,542.63        0.00          0.00      5,972,862.37
I-PO               21,501.00        8,283.01         0.00           9.42           9.42        0.00          0.00          8,273.59
IIA-1         121,111,453.00   61,833,562.73   334,931.80   1,478,434.44   1,813,366.24        0.00          0.00     60,355,128.29
IIA-2           1,000,000.00      324,787.71     1,759.27      16,644.94      18,404.21        0.00          0.00        308,142.77
IIA-3           8,262,000.00    8,262,000.00    44,752.50           0.00      44,752.50        0.00          0.00      8,262,000.00
IIA-4          14,913,749.00   12,779,472.33    69,222.14      62,914.87     132,137.01        0.00          0.00     12,716,557.46
IIA-5          46,447,250.00   15,776,318.26    85,455.06     808,515.60     893,970.66        0.00          0.00     14,967,802.66
IIA-6           2,127,000.00            0.00         0.00           0.00           0.00        0.00          0.00              0.00
II-X *          7,513,508.12    3,186,622.98    17,260.87           0.00      17,260.87        0.00          0.00      3,102,494.18
II-PO             350,133.00      242,441.13         0.00       1,228.01       1,228.01        0.00          0.00        241,213.12


------------------------------------------------------------------------------------------------------------------------------------
TOTALS        333,910,590.00  177,144,753.64 1,026,212.40   4,534,531.40   5,560,743.80        0.00          0.00    172,610,222.24
------------------------------------------------------------------------------------------------------------------------------------
*Notional Class Balance
</TABLE>


<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
                            FACTOR INFORMATION PER $1000 OF ORIGINAL FACE                                     PASS-THROUGH
                                       PRIOR                                                  CURRENT            RATES
                                   PRINCIPAL                                                PRINCIPAL
     CLASS          CUSIP            BALANCE      INTEREST     PRINCIPAL          TOTAL       BALANCE       CURRENT           NEXT
------------------------------------------------------------------------------------------------------------------------------------
<S>                <C>          <C>              <C>           <C>            <C>              <C>           <C>           <C>

IA-1               055240CT0      357.350167     2.010095      22.546828      24.556923        334.803338    6.75000       6.750000%
IA-2               055240CU7    1,000.000000     5.625000       0.000000       5.625000        1,000.000000  6.75000       6.750000%
IA-3               055240CV5    1,000.000000     5.625000       0.000000       5.625000        1,000.000000  6.75000       6.750000%
IA-4               055240CW3    1,000.000000     5.625000       0.000000       5.625000        1,000.000000  6.75000       6.750000%
IA-5               055240CX1    1,000.000000     5.625001       0.000000       5.625001        1,000.000000  6.75000       6.750000%
IA-6               055240CY9    1,000.000000     5.625001       0.000000       5.625001        1,000.000000  6.75000       6.750000%
I-X *              055240DF9      512.438466     5.624999       0.000000       5.624999          498.415171  6.75000       0.000000%
I-PO               055240DH5      385.238361     0.000000       0.438119       0.438119          384.800242  0.00000       6.500000%
IIA-1              055240CZ6      510.550912     2.765484      12.207222      14.972706          498.343689  6.50000       6.500000%
IIA-2              055240DA0      324.787710     1.759270      16.644940      18.404210          308.142770  6.50000       6.500000%
IIA-3              055240DB8    1,000.000000     5.416667       0.000000       5.416667        1,000.000000  6.50000       6.500000%
IIA-4              055240DC6      856.892008     4.641498       4.218582       8.860080          852.673426  6.50000       6.500000%
IIA-5              055240DD4      339.660976     1.839830      17.407179      19.247010          322.253797  6.50000       6.500000%
IIA-6              055240DE2        0.000000     0.000000       0.000000       0.000000            0.000000  6.50000       6.500000%
II-X *             055240DG7      424.119190     2.297312       0.000000       2.297312          412.922184  6.50000       0.000000%
II-PO              055240DU6      692.425821     0.000000       3.507267       3.507267          688.918554  0.00000       0.000000%


------------------------------------------------------------------------------------------------------------------------------------
SELLER:                                    Bank of America                      ADMINISTRATOR:                Eiko Akiyama
SERVICER:                                  Bank of America                                                   Deutsche Bank
LEAD UNDERWRITER:                    Donaldson, Lufkin & Jenrette                                       1761 E. St. Andrew Place
RECORD DATE:                                July 31, 2001                                                  Santa Ana, CA 92705
DISTRIBUTION DATE:                         August 27, 2001                      FACTOR INFORMATION:         (800) 735-7777
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
                                    Page 2 of 5 (C) COPYRIGHT 2001 Deutsche Bank


<PAGE>


                          BA MORTGAGE SECURITIES, INC.
                       MORTGAGE PASS-THROUGH CERTIFICATES
                                  SERIES 1998-1

                         STATEMENT TO CERTIFICATEHOLDERS

 Statements are available online at http://www-apps.gis.deutsche-bank.com/invr.
    Statement posting begins 7:00 PM Eastern time the business day prior to
                                 distribution.
<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
                                                     DISTRIBUTIONS IN DOLLARS
                                       PRIOR                                                                               CURRENT
                     ORIGINAL      PRINCIPAL                                                 REALIZED      DEFERRED      PRINCIPAL
 CLASS             FACE VALUE        BALANCE      INTEREST     PRINCIPAL          TOTAL        LOSSES      INTEREST        BALANCE
------------------------------------------------------------------------------------------------------------------------------------
<S>             <C>             <C>              <C>           <C>            <C>              <C>           <C>       <C>

M               3,776,882.00    3,406,525.61    18,769.54      10,918.41      29,687.95        0.00          0.00      3,395,607.20
B-1             2,231,794.00    2,012,946.99    11,091.09       6,451.79      17,542.88        0.00          0.00      2,006,495.20
B-2             1,201,735.00    1,083,894.38     5,972.13       3,474.04       9,446.17        0.00          0.00      1,080,420.34
B-3             1,030,060.00      929,053.57     5,118.97       2,977.75       8,096.72        0.00          0.00        926,075.82
B-4               515,029.00      464,525.88     2,559.48       1,488.87       4,048.35        0.00          0.00        463,037.01
B-5               686,706.32      619,368.78     3,412.65       1,985.18       5,397.83        0.00          0.00        617,383.60
R-II                   50.00            0.00         0.00           0.00           0.00        0.00          0.00              0.00


------------------------------------------------------------------------------------------------------------------------------------
TOTALS          9,442,256.32    8,516,315.21    46,923.86      27,296.04      74,219.90        0.00          0.00      8,489,019.17
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>


<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
                            FACTOR INFORMATION PER $1000 OF ORIGINAL FACE                                     PASS-THROUGH
                                       PRIOR                                                  CURRENT            RATES
                                   PRINCIPAL                                                PRINCIPAL
CLASS               CUSIP            BALANCE      INTEREST     PRINCIPAL          TOTAL       BALANCE       CURRENT           NEXT
------------------------------------------------------------------------------------------------------------------------------------
<S>             <C>               <C>             <C>           <C>            <C>         <C>              <C>           <C>

M                055240DJ1        901.941234     4.969586       2.890853       7.860439     899.050381      6.61185       6.612092%
B-1              055240DK8        901.941214     4.969585       2.890854       7.860439     899.050360      6.61185       6.612092%
B-2              055240DL6        901.941260     4.969590       2.890854       7.860443     899.050406      6.61185       6.612092%
B-3              055240DM4        901.941217     4.969584       2.890851       7.860435     899.050366      6.61185       6.612092%
B-4              055240DN2        901.941211     4.969584       2.890847       7.860431     899.050364      6.61185       6.612092%
B-5              055240DP7        901.941284     4.969592       2.890872       7.860464     899.050412      6.61185       6.612092%
R-II             055240DR3          0.000000     0.000000       0.000000       0.000000       0.000000      6.75000       6.750000%


------------------------------------------------------------------------------------------------------------------------------------
SELLER:                                    Bank of America                      ADMINISTRATOR:                Eiko Akiyama
SERVICER:                                  Bank of America                                                   Deutsche Bank
LEAD UNDERWRITER:                    Donaldson, Lufkin & Jenrette                                       1761 E. St. Andrew Place
RECORD DATE:                                July 31, 2001                                                  Santa Ana, CA 92705
DISTRIBUTION DATE:                         August 27, 2001                      FACTOR INFORMATION:         (800) 735-7777
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
                                    Page 3 of 5 (C) COPYRIGHT 2001 Deutsche Bank
<PAGE>


                          BA MORTGAGE SECURITIES, INC.
                       MORTGAGE PASS-THROUGH CERTIFICATES
                                  SERIES 1998-1

                         STATEMENT TO CERTIFICATEHOLDERS

<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
Distribution Date:            August 27, 2001
------------------------------------------------------------------------------------------------------------------------------------

MORTGAGE POOL INFORMATION:                                                  GROUP I                     GROUP II
--------------------------                                                  -------                     --------

<S>                                                                       <C>                         <C>
                BEGINNING BALANCE OF POOL                                   81,736,510.34                103,924,558.72
                LESS:         SCHEDULED PRINCIPAL                              (88,549.91)                 (511,629.00)
                              PRINCIPAL PREPAYMENTS                         (2,082,371.58)               (1,879,276.95)
                              REPURCHASES                                            0.00                         0.00
                              LIQUIDATIONS                                           0.00                         0.00
                              OTHER UNSCHEDULED PRINCIPAL                            0.00                         0.00
                                                                          ----------------               --------------
                ENDING BALANCE OF POOL                                      79,565,588.85                101,533,652.77
                                                                          ================               ==============

                BEGINNING NUMBER OF LOANS IN POOL                                     262                          355
                ENDING NUMBER OF LOANS IN POOL                                        255                          348

                WEIGHTED AVERAGE REMAINING TERM TO MATURITY                           306                          133
                WEIGHTED AVERAGE NET CONTRACT RATE                              7.506448%                    7.065207%

                CURRENT REALIZED LOSSES ON THE POOL                                  0.00                         0.00
                CUMULATIVE REALIZED LOSSES ON THE POOL                               0.00                         0.00

                BEGINNING POOL BALANCE OF PREMIUM LOANS                     80,570,709.81                95,587,372.54
                STRIPPED INTEREST RATE                                          0.514469%                    0.216692%

</TABLE>

<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
DELINQUENT, BANKRUPTCY,                                                                     LOANS         LOANS         LOANS
FORECLOSURE, AND REO                           30 TO 59      60 TO 89       90 PLUS          IN            IN             IN
LOAN INFORMATION                                 DAYS          DAYS           DAYS       BANKRUPTCY    FORECLOSURE       REO
------------------------------------------------------------------------------------------------------------------------------------
<S>                                            <C>         <C>           <C>              <C>             <C>           <C>
GROUP I         PRINCIPAL BALANCE                 0.00     232,328.50    249,463.69           0.00           0.00          0.00
                     PERCENTAGE OF GROUP BAL.  0.0000%        0.1283%       0.1377%        0.0000%        0.0000%       0.0000%
                NUMBER OF LOANS                      0              1             1              0              0             0
                     PERCENTAGE OF LOANS       0.0000%        0.1658%       0.1658%        0.0000%        0.0000%       0.0000%
GROUP II        PRINCIPAL BALANCE                 0.00           0.00          0.00           0.00           0.00          0.00
                     PERCENTAGE OF GROUP BAL.  0.0000%        0.0000%       0.0000%        0.0000%        0.0000%       0.0000%
                NUMBER OF LOANS                      0              0             0              0              0             0
                     PERCENTAGE OF LOANS       0.0000%        0.0000%       0.0000%        0.0000%        0.0000%       0.0000%
------------------------------------------------------------------------------------------------------------------------------------
                GROUP I BOOK VALUE OF REO PROPERTIES                                                             NA
                GROUP II BOOK VALUE OF REO PROPERTIES                                                            NA
</TABLE>

<TABLE>
<CAPTION>
SERVICING INFORMATION:                                                      GROUP I                     GROUP II
----------------------                                                      -------                     --------

<S>                                                                           <C>                         <C>
                SERVICING FEES ACCRUED DURING THE CURRENT DUE PERIOD            17,028.44                    33,001.45
                PLUS:         ADDITIONAL SERVICING COMPENSATION                      0.00                         0.00
                LESS:         AMTS. TO COVER PREPAYMENT INT. SHORTFALL          (5,921.26)                   (5,994.52)
                              DELINQUENT SERVICING FEES                           (630.72)                     (471.30)
                                                                          ----------------               --------------
                SERVICING FEES COLLECTED FOR THE CURRENT DUE PERIOD             10,476.46                    26,535.63
                                                                          ================               ==============

                ADVANCED PRINCIPAL                                               3,391.43                     7,793.32
                ADVANCED INTEREST                                               17,977.57                     9,391.88
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
                                    Page 4 of 5 (C) COPYRIGHT 2001 Deutsche Bank


<PAGE>


                          BA MORTGAGE SECURITIES, INC.
                       MORTGAGE PASS-THROUGH CERTIFICATES
                                  SERIES 1998-1

                         STATEMENT TO CERTIFICATEHOLDERS
<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
Distribution Date:            August 27, 2001
------------------------------------------------------------------------------------------------------------------------------------
                                                 OTHER                                     CUMULATIVE
                             PREPAYMENT       UNSCHEDULED                 CERTIFICATE        UNPAID                     CUMULATIVE
                             PRINCIPAL         PRINCIPAL                    INTEREST        INTEREST                     REALIZED
     CLASS                  DISTRIBUTED       DISTRIBUTED                  SHORTFALL        SHORTFALL                     LOSSES
------------------------------------------------------------------------------------------------------------------------------------
<S>                         <C>                   <C>                          <C>            <C>                          <C>
  CLASS IA-1               2,082,362.53           0.00                         0.00           0.00                         0.00
  CLASS IA-2                       0.00           0.00                         0.00           0.00                         0.00
  CLASS IA-3                       0.00           0.00                         0.00           0.00                         0.00
  CLASS IA-4                       0.00           0.00                         0.00           0.00                         0.00
  CLASS IA-5                       0.00           0.00                         0.00           0.00                         0.00
  CLASS IA-6                       0.00           0.00                         0.00           0.00                         0.00
  CLASS I-X                        0.00           0.00                         0.00           0.00                         0.00
  CLASS I-PO                       9.05           0.00                         0.00           0.00                         0.00
  CLASS IIA-1              1,173,435.54           0.00                         0.00           0.00                         0.00
  CLASS IIA-2                 13,211.11           0.00                         0.00           0.00                         0.00
  CLASS IIA-3                      0.00           0.00                         0.00           0.00                         0.00
  CLASS IIA-4                 49,935.62           0.00                         0.00           0.00                         0.00
  CLASS IIA-5                641,720.00           0.00                         0.00           0.00                         0.00
  CLASS IIA-6                      0.00           0.00                         0.00           0.00                         0.00
  CLASS II-X                       0.00           0.00                         0.00           0.00                         0.00
  CLASS II-PO                    974.67           0.00                         0.00           0.00                         0.00
  CLASS M                          0.00           0.00                         0.00           0.00                         0.00
  CLASS B-1                        0.00           0.00                         0.00           0.00                         0.00
  CLASS B-2                        0.00           0.00                         0.00           0.00                         0.00
  CLASS B-3                        0.00           0.00                         0.00           0.00                         0.00
  CLASS B-4                        0.00           0.00                         0.00           0.00                         0.00
  CLASS B-5                        0.00           0.00                         0.00           0.00                         0.00

-----------------------------------------------------------------------------------------------------------------------------------
    TOTALS                 3,961,648.53           0.00                         0.00           0.00                         0.00
-----------------------------------------------------------------------------------------------------------------------------------

</TABLE>


<TABLE>
<CAPTION>

<S>                                                                                                      <C>


                OTHER REPORTING ITEMS:

                GROUP I PERCENTAGE                                                                              95.34%
                GROUP I PREPAYMENT PERCENTAGE                                                                  100.00%
                GROUP II PERCENTAGE                                                                             95.46%
                GROUP II PREPAYMENT PERCENTAGE                                                                 100.00%

                SUBORDINATE PRINCIPAL DISTRIBUTION AMOUNT                                                    27,296.04
                HAS THE CREDIT SUPPORT DEPLETION DATE OCCURRED                                                      No

                BANKRUPTCY AMOUNT                                                                           100,000.00
                FRAUD LOSS AMOUNT                                                                           119,926.36
                SPECIAL HAZARD AMOUNT                                                                     4,500,664.47
                EXTRAORDINARY LOSSES FOR THE PRIOR PERIOD                                                         0.00

                GROUP I EXTRAORDINARY LOSSES                                                                      0.00
                GROUP II EXTRAORDINARY LOSSES                                                                     0.00
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
                                    Page 5 of 5 (C) COPYRIGHT 2001 Deutsche Bank
<PAGE>

                          BA MORTGAGE SECURITIES, INC.
                       MORTGAGE PASS-THROUGH CERTIFICATES
                                  SERIES 1998-1



                         STATEMENT TO CERTIFICATEHOLDERS

 Statements are available online at http://www-apps.gis.deutsche-bank.com/invr.
    Statement posting begins 7:00 PM Eastern time the business day prior to
                                 distribution.
<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
                                                     DISTRIBUTIONS IN DOLLARS
                                       PRIOR                                                                               CURRENT
                   ORIGINAL        PRINCIPAL                                                 REALIZED      DEFERRED      PRINCIPAL
 CLASS           FACE VALUE          BALANCE      INTEREST     PRINCIPAL          TOTAL        LOSSES      INTEREST        BALANCE
------------------------------------------------------------------------------------------------------------------------------------
<S>            <C>            <C>               <C>         <C>            <C>                 <C>           <C>      <C>

  P1-M             21,501.00        8,273.59         0.00           9.47           9.47        0.00          0.00          8,264.12
  P2-M            350,133.00      241,213.12         0.00       1,265.91       1,265.91        0.00          0.00        239,947.21
  X1-M *      142,084,361.67   78,401,284.33    33,597.35           0.00      33,597.35        0.00          0.00     77,125,934.22
  X2-M *      187,559,494.52   93,238,675.73    16,805.18           0.00      16,805.18        0.00          0.00     90,526,880.96
  Y1               71,698.81       38,693.20       217.65         191.39         409.04        0.00          0.00         38,501.81
  Y2               99,676.65       47,604.52       257.86         418.97         676.83        0.00          0.00         47,185.55
  Z1          143,556,266.44   79,518,622.16   447,292.25   1,276,653.92   1,723,946.17        0.00          0.00     78,241,968.24
  Z2          199,253,620.42  101,244,834.82   548,409.51   2,754,319.84   3,302,729.35        0.00          0.00     98,490,514.98
  R-I                  50.00            0.00         0.00           0.00           0.00        0.00          0.00              0.00

------------------------------------------------------------------------------------------------------------------------------------
TOTALS        343,352,946.32  181,099,241.41 1,046,579.80   4,032,859.50   5,079,439.30        0.00          0.00    177,066,381.91
------------------------------------------------------------------------------------------------------------------------------------
  *Notional Class Balance
</TABLE>


<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
                            FACTOR INFORMATION PER $1000 OF ORIGINAL FACE                                     PASS-THROUGH
                                       PRIOR                                                    CURRENT            RATES
                                   PRINCIPAL                                                  PRINCIPAL
CLASS              CUSIP            BALANCE      INTEREST        PRINCIPAL          TOTAL       BALANCE       CURRENT           NEXT
------------------------------------------------------------------------------------------------------------------------------------
<S>             <C>              <C>             <C>             <C>               <C>         <C>          <C>            <C>

P1-M                             384.800242      0.000000         0.440445          0.440445    384.359797    0.000000%   0.000000%
P2-M                             688.918554      0.000000         3.615512          3.615512    685.303042    0.000000%   0.000000%
X1-M *                           551.793902      0.236461         0.000000          0.236461    542.817896    0.514237%   0.514237%
X2-M *                           497.115201      0.089599         0.000000          0.089599    482.656883    0.216286%   0.216286%
Y1                               539.663052      3.035615         2.669329          5.704944    536.993691    6.750000%   6.750000%
Y2                               477.589493      2.586965         4.203242          6.790207    473.386201    6.500000%   6.500000%
Z1                               553.919548      3.115797         8.893056         12.008853    545.026492    6.750000%   6.750000%
Z2                               508.120428      2.752319        13.823186         16.575505    494.297242    6.500000%   6.500000%
R-I             055240DQ5          0.000000      0.000000         0.000000          0.000000      0.000000    6.750000%   6.750000%



------------------------------------------------------------------------------------------------------------------------------------
SELLER:                                    Bank of America                      ADMINISTRATOR:                Eiko Akiyama
SERVICER:                                  Bank of America                                                   Deutsche Bank
LEAD UNDERWRITER:                    Donaldson, Lufkin & Jenrette                                       1761 E. St. Andrew Place
RECORD DATE:                              August 31, 2001                                                   Santa Ana, CA 92705
DISTRIBUTION DATE:                      September 25, 2001                      FACTOR INFORMATION:         (800) 735-7777
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>

                                    Page 1 of 5 (C) COPYRIGHT 2001 Deutsche Bank


<PAGE>


                          BA MORTGAGE SECURITIES, INC.
                       MORTGAGE PASS-THROUGH CERTIFICATES
                                  SERIES 1998-1

                         STATEMENT TO CERTIFICATEHOLDERS

 Statements are available online at http://www-apps.gis.deutsche-bank.com/invr.
    Statement posting begins 7:00 PM Eastern time the business day prior to
                                 distribution.
<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
                                                     DISTRIBUTIONS IN DOLLARS
                                      PRIOR                                                                               CURRENT
                  ORIGINAL        PRINCIPAL                                                 REALIZED      DEFERRED      PRINCIPAL
CLASS           FACE VALUE          BALANCE      INTEREST     PRINCIPAL          TOTAL        LOSSES      INTEREST        BALANCE
------------------------------------------------------------------------------------------------------------------------------------
<S>           <C>             <C>              <C>          <C>            <C>                 <C>           <C>     <C>

IA-1           96,101,504.00   32,175,104.35   180,984.96   1,272,632.76   1,453,617.72        0.00          0.00     30,902,471.59
IA-2            5,000,000.00    5,000,000.00    28,125.00           0.00      28,125.00        0.00          0.00      5,000,000.00
IA-3            9,500,000.00    9,500,000.00    53,437.50           0.00      53,437.50        0.00          0.00      9,500,000.00
IA-4           14,250,000.00   14,250,000.00    80,156.25           0.00      80,156.25        0.00          0.00     14,250,000.00
IA-5            4,887,000.00    4,887,000.00    27,489.38           0.00      27,489.38        0.00          0.00      4,887,000.00
IA-6            9,939,000.00    9,939,000.00    55,906.88           0.00      55,906.88        0.00          0.00      9,939,000.00
I-X *          11,983,709.00    5,972,862.37    33,597.33           0.00      33,597.33        0.00          0.00      5,860,719.16
I-PO               21,501.00        8,273.59         0.00           9.47           9.47        0.00          0.00          8,264.12
IIA-1         121,111,453.00   60,355,128.29   326,923.61   1,706,415.31   2,033,338.92        0.00          0.00     58,648,712.98
IIA-2           1,000,000.00      308,142.77     1,669.11      19,399.97      21,069.08        0.00          0.00        288,742.80
IIA-3           8,262,000.00    8,262,000.00    44,752.50           0.00      44,752.50        0.00          0.00      8,262,000.00
IIA-4          14,913,749.00   12,716,557.46    68,881.35      63,281.45     132,162.80        0.00          0.00     12,653,276.01
IIA-5          46,447,250.00   14,967,802.66    81,075.60     942,339.00   1,023,414.60        0.00          0.00     14,025,463.66
IIA-6           2,127,000.00            0.00         0.00           0.00           0.00        0.00          0.00              0.00
II-X *          7,513,508.12    3,102,494.18    16,805.18           0.00      16,805.18        0.00          0.00      2,983,644.07
II-PO             350,133.00      241,213.12         0.00       1,265.91       1,265.91        0.00          0.00        239,947.21

------------------------------------------------------------------------------------------------------------------------------------
TOTALS        333,910,590.00  172,610,222.24   999,804.65   4,005,343.87   5,005,148.52        0.00          0.00    168,604,878.37
------------------------------------------------------------------------------------------------------------------------------------
*Notional Class Balance
</TABLE>

<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
                            FACTOR INFORMATION PER $1000 OF ORIGINAL FACE                                     PASS-THROUGH
                                       PRIOR                                                  CURRENT            RATES
                                   PRINCIPAL                                                PRINCIPAL
     CLASS          CUSIP            BALANCE      INTEREST     PRINCIPAL        TOTAL         BALANCE       CURRENT          NEXT
------------------------------------------------------------------------------------------------------------------------------------
<S>             <C>             <C>              <C>          <C>             <C>          <C>            <C>           <C>

IA-1           055240CT0          334.803338     1.883269      13.242589      15.125858    321.560749     6.75000       6.750000%
IA-2           055240CU7        1,000.000000     5.625000       0.000000       5.625000    1,000.000000   6.75000       6.750000%
IA-3           055240CV5        1,000.000000     5.625000       0.000000       5.625000    1,000.000000   6.75000       6.750000%
IA-4           055240CW3        1,000.000000     5.625000       0.000000       5.625000    1,000.000000   6.75000       6.750000%
IA-5           055240CX1        1,000.000000     5.625001       0.000000       5.625001    1,000.000000   6.75000       6.750000%
IA-6           055240CY9        1,000.000000     5.625001       0.000000       5.625001    1,000.000000   6.75000       6.750000%
I-X *          055240DF9          498.415171     5.624997       0.000000       5.624997    489.057199     6.75000       0.000000%
I-PO           055240DH5          384.800242     0.000000       0.440445       0.440445    384.359797     0.00000       6.500000%
IIA-1          055240CZ6          498.343689     2.699362      14.089628      16.788990    484.254061     6.50000       6.500000%
IIA-2          055240DA0          308.142770     1.669110      19.399970      21.069080    288.742800     6.50000       6.500000%
IIA-3          055240DB8        1,000.000000     5.416667       0.000000       5.416667    1,000.000000   6.50000       6.500000%
IIA-4          055240DC6          852.673426     4.618648       4.243162       8.861809    848.430265     6.50000       6.500000%
IIA-5          055240DD4          322.253797     1.745541      20.288370      22.033912    301.965427     6.50000       6.500000%
IIA-6          055240DE2            0.000000     0.000000       0.000000       0.000000    0.000000       6.50000       6.500000%
II-X *         055240DG7          412.922184     2.236662       0.000000       2.236662    397.103992     6.50000       0.000000%
II-PO          055240DU6          688.918554     0.000000       3.615512       3.615512    685.303042     0.00000       0.000000%



------------------------------------------------------------------------------------------------------------------------------------
SELLER:                                    Bank of America                      ADMINISTRATOR:                Eiko Akiyama
SERVICER:                                  Bank of America                                                   Deutsche Bank
LEAD UNDERWRITER:                    Donaldson, Lufkin & Jenrette                                       1761 E. St. Andrew Place
RECORD DATE:                              August 31, 2001                                                   Santa Ana, CA 92705
DISTRIBUTION DATE:                      September 25, 2001                      FACTOR INFORMATION:         (800) 735-7777
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
                                    Page 2 of 5 (C) COPYRIGHT 2001 Deutsche Bank
<PAGE>


                          BA MORTGAGE SECURITIES, INC.
                       MORTGAGE PASS-THROUGH CERTIFICATES
                                  SERIES 1998-1

                         STATEMENT TO CERTIFICATEHOLDERS

 Statements are available online at http://www-apps.gis.deutsche-bank.com/invr.
    Statement posting begins 7:00 PM Eastern time the business day prior to
                                 distribution.
<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
                                                     DISTRIBUTIONS IN DOLLARS
                                       PRIOR                                                                               CURRENT
                     ORIGINAL      PRINCIPAL                                                 REALIZED      DEFERRED      PRINCIPAL
CLASS              FACE VALUE        BALANCE      INTEREST     PRINCIPAL          TOTAL        LOSSES      INTEREST        BALANCE
------------------------------------------------------------------------------------------------------------------------------------
<S>             <C>            <C>              <C>            <C>            <C>              <C>           <C>       <C>

M               3,776,882.00    3,395,607.20    18,710.06      11,006.25      29,716.31        0.00          0.00      3,384,600.95
B-1             2,231,794.00    2,006,495.20    11,055.94       6,503.70      17,559.64        0.00          0.00      1,999,991.50
B-2             1,201,735.00    1,080,420.34     5,953.20       3,501.99       9,455.19        0.00          0.00      1,076,918.35
B-3             1,030,060.00      926,075.82     5,102.75       3,001.71       8,104.46        0.00          0.00        923,074.11
B-4               515,029.00      463,037.01     2,551.37       1,500.85       4,052.22        0.00          0.00        461,536.16
B-5               686,706.32      617,383.60     3,401.83       2,001.13       5,402.96        0.00          0.00        615,382.47
R-II                   50.00            0.00         0.00           0.00           0.00        0.00          0.00              0.00




------------------------------------------------------------------------------------------------------------------------------------
TOTALS          9,442,256.32    8,489,019.17    46,775.15      27,515.63      74,290.78        0.00          0.00      8,461,503.54
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>


<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
                            FACTOR INFORMATION PER $1000 OF ORIGINAL FACE                                     PASS-THROUGH
                                       PRIOR                                                  CURRENT            RATES
                                   PRINCIPAL                                                PRINCIPAL
CLASS              CUSIP            BALANCE      INTEREST     PRINCIPAL          TOTAL       BALANCE       CURRENT           NEXT
------------------------------------------------------------------------------------------------------------------------------------
<S>             <C>               <C>             <C>           <C>            <C>          <C>            <C>           <C>

M                055240DJ1        899.050381     4.953838       2.914110       7.867948     896.136271     6.61209       6.612332%
B-1              055240DK8        899.050360     4.953835       2.914113       7.867948     896.136247     6.61209       6.612332%
B-2              055240DL6        899.050406     4.953838       2.914112       7.867949     896.136295     6.61209       6.612332%
B-3              055240DM4        899.050366     4.953838       2.914112       7.867949     896.136254     6.61209       6.612332%
B-4              055240DN2        899.050364     4.953838       2.914108       7.867945     896.136256     6.61209       6.612332%
B-5              055240DP7        899.050412     4.953835       2.914099       7.867934     896.136313     6.61209       6.612332%
R-II             055240DR3          0.000000     0.000000       0.000000       0.000000       0.000000     6.75000       6.750000%



------------------------------------------------------------------------------------------------------------------------------------
SELLER:                                    Bank of America                      ADMINISTRATOR:                Eiko Akiyama
SERVICER:                                  Bank of America                                                   Deutsche Bank
LEAD UNDERWRITER:                    Donaldson, Lufkin & Jenrette                                       1761 E. St. Andrew Place
RECORD DATE:                              August 31, 2001                                                   Santa Ana, CA 92705
DISTRIBUTION DATE:                      September 25, 2001                      FACTOR INFORMATION:         (800) 735-7777
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
                                    Page 3 of 5 (C) COPYRIGHT 2001 Deutsche Bank


<PAGE>


                          BA MORTGAGE SECURITIES, INC.
                       MORTGAGE PASS-THROUGH CERTIFICATES
                                  SERIES 1998-1

                         STATEMENT TO CERTIFICATEHOLDERS

<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
Distribution Date:            September 25, 2001
------------------------------------------------------------------------------------------------------------------------------------

MORTGAGE POOL INFORMATION:                                                  GROUP I                     GROUP II
--------------------------                                                  -------                     --------

<S>                                                                       <C>                         <C>
                BEGINNING BALANCE OF POOL                                      79,565,588.85                     101,533,652.77
                LESS:         SCHEDULED PRINCIPAL                                 (88,060.05)                       (505,258.13)
                              PRINCIPAL PREPAYMENTS                            (1,188,794.74)                     (2,250,746.59)
                              REPURCHASES                                               0.00                               0.00
                              LIQUIDATIONS                                              0.00                               0.00
                              OTHER UNSCHEDULED PRINCIPAL                               0.00                               0.00
                                                                          -------------------                  -----------------
                ENDING BALANCE OF POOL                                         78,288,734.06                      98,777,648.05
                                                                          ===================                  =================

                BEGINNING NUMBER OF LOANS IN POOL                                        255                                348
                ENDING NUMBER OF LOANS IN POOL                                           251                                341

                WEIGHTED AVERAGE REMAINING TERM TO MATURITY                              304                                132
                WEIGHTED AVERAGE NET CONTRACT RATE                                 7.506010%                          7.063338%

                CURRENT REALIZED LOSSES ON THE POOL                                     0.00                               0.00
                CUMULATIVE REALIZED LOSSES ON THE POOL                                  0.00                               0.00

                BEGINNING POOL BALANCE OF PREMIUM LOANS                        78,401,284.33                      93,238,675.73
                STRIPPED INTEREST RATE                                             0.514237%                          0.216286%
</TABLE>

<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
DELINQUENT, BANKRUPTCY,                                                                     LOANS         LOANS         LOANS
FORECLOSURE, AND REO                           30 TO 59      60 TO 89       90 PLUS          IN            IN             IN
LOAN INFORMATION                                 DAYS          DAYS           DAYS       BANKRUPTCY    FORECLOSURE       REO
------------------------------------------------------------------------------------------------------------------------------------
<S>                                            <C>            <C>           <C>           <C>           <C>             <C>
GROUP I     PRINCIPAL BALANCE                  231,242.65        0.00          0.00          0.00       249,193.21          0.00
                 PERCENTAGE OF GROUP BAL.         0.1306%     0.0000%       0.0000%       0.0000%          0.1407%       0.0000%
            NUMBER OF LOANS                             1           0             0             0                1             0
                 PERCENTAGE OF LOANS              0.1689%     0.0000%       0.0000%       0.0000%          0.1689%       0.0000%
GROUP II    PRINCIPAL BALANCE                        0.00        0.00          0.00          0.00             0.00          0.00
                 PERCENTAGE OF GROUP BAL.         0.0000%     0.0000%       0.0000%       0.0000%          0.0000%       0.0000%
            NUMBER OF LOANS                             0           0             0             0                0             0
                 PERCENTAGE OF LOANS              0.0000%     0.0000%       0.0000%       0.0000%          0.0000%       0.0000%
------------------------------------------------------------------------------------------------------------------------------------
                GROUP I BOOK VALUE OF REO PROPERTIES                                                             NA
                GROUP II BOOK VALUE OF REO PROPERTIES                                                            NA
</TABLE>

<TABLE>
<CAPTION>
SERVICING INFORMATION:                                                      GROUP I                     GROUP II
----------------------                                                      -------                     --------

<S>                                                                           <C>                         <C>
                SERVICING FEES ACCRUED DURING THE CURRENT DUE PERIOD               16,576.16                          32,166.21
                PLUS:         ADDITIONAL SERVICING COMPENSATION                         0.00                               0.00
                LESS:         AMTS. TO COVER PREPAYMENT INT. SHORTFALL             (4,343.59)                         (8,761.56)
                              DELINQUENT SERVICING FEES                            (1,490.59)                         (3,156.25)
                                                                          -------------------                  -----------------
                SERVICING FEES COLLECTED FOR THE CURRENT DUE PERIOD                10,741.98                          20,248.40
                                                                          ===================                  =================

                ADVANCED PRINCIPAL                                                  7,467.12                          47,473.82
                ADVANCED INTEREST                                                  43,097.04                          53,747.24
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
                                    Page 4 of 5 (C) COPYRIGHT 2001 Deutsche Bank


<PAGE>


                          BA MORTGAGE SECURITIES, INC.
                       MORTGAGE PASS-THROUGH CERTIFICATES
                                  SERIES 1998-1

                         STATEMENT TO CERTIFICATEHOLDERS
<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
Distribution Date:            September 25, 2001
------------------------------------------------------------------------------------------------------------------------------------
                                                   OTHER                                   CUMULATIVE
                                PREPAYMENT      UNSCHEDULED                 CERTIFICATE      UNPAID                 CUMULATIVE
                                PRINCIPAL        PRINCIPAL                    INTEREST      INTEREST                 REALIZED
    CLASS                      DISTRIBUTED      DISTRIBUTED                  SHORTFALL      SHORTFALL                 LOSSES
------------------------------------------------------------------------------------------------------------------------------------

<S>                             <C>                 <C>                        <C>           <C>                        <C>
 CLASS IA-1                    1,188,785.89         0.00                       0.00           0.00                      0.00
 CLASS IA-2                            0.00         0.00                       0.00           0.00                      0.00
 CLASS IA-3                            0.00         0.00                       0.00           0.00                      0.00
 CLASS IA-4                            0.00         0.00                       0.00           0.00                      0.00
 CLASS IA-5                            0.00         0.00                       0.00           0.00                      0.00
 CLASS IA-6                            0.00         0.00                       0.00           0.00                      0.00
 CLASS I-X                             0.00         0.00                       0.00           0.00                      0.00
 CLASS I-PO                            8.85         0.00                       0.00           0.00                      0.00
 CLASS IIA-1                   1,405,462.05         0.00                       0.00           0.00                      0.00
 CLASS IIA-2                      15,978.48         0.00                       0.00           0.00                      0.00
 CLASS IIA-3                           0.00         0.00                       0.00           0.00                      0.00
 CLASS IIA-4                      52,120.77         0.00                       0.00           0.00                      0.00
 CLASS IIA-5                     776,142.65         0.00                       0.00           0.00                      0.00
 CLASS IIA-6                           0.00         0.00                       0.00           0.00                      0.00
 CLASS II-X                            0.00         0.00                       0.00           0.00                      0.00
 CLASS II-PO                       1,042.65         0.00                       0.00           0.00                      0.00
 CLASS M                               0.00         0.00                       0.00           0.00                      0.00
 CLASS B-1                             0.00         0.00                       0.00           0.00                      0.00
 CLASS B-2                             0.00         0.00                       0.00           0.00                      0.00
 CLASS B-3                             0.00         0.00                       0.00           0.00                      0.00
 CLASS B-4                             0.00         0.00                       0.00           0.00                      0.00
 CLASS B-5                             0.00         0.00                       0.00           0.00                      0.00

------------------------------------------------------------------------------------------------------------------------------------
TOTALS                         3,439,541.33         0.00                       0.00           0.00                      0.00
------------------------------------------------------------------------------------------------------------------------------------

</TABLE>


<TABLE>
<CAPTION>

<S>                                                                                       <C>

                   OTHER REPORTING ITEMS:

                   GROUP I PERCENTAGE                                                          95.22%
                   GROUP I PREPAYMENT PERCENTAGE                                              100.00%
                   GROUP II PERCENTAGE                                                         95.38%
                   GROUP II PREPAYMENT PERCENTAGE                                             100.00%

                   SUBORDINATE PRINCIPAL DISTRIBUTION AMOUNT                                27,515.64
                   HAS THE CREDIT SUPPORT DEPLETION DATE OCCURRED                                  No

                   BANKRUPTCY AMOUNT                                                       100,000.00
                   FRAUD LOSS AMOUNT                                                       119,926.36
                   SPECIAL HAZARD AMOUNT                                                 4,500,664.47
                   EXTRAORDINARY LOSSES FOR THE PRIOR PERIOD                                     0.00

                   GROUP I EXTRAORDINARY LOSSES                                                  0.00
                   GROUP II EXTRAORDINARY LOSSES                                                 0.00

------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
                                    Page 5 of 5 (C) COPYRIGHT 2001 Deutsche Bank


<PAGE>

                          BA MORTGAGE SECURITIES, INC.
                       MORTGAGE PASS-THROUGH CERTIFICATES
                                  SERIES 1998-1



                         STATEMENT TO CERTIFICATEHOLDERS

 Statements are available online at http://www-apps.gis.deutsche-bank.com/invr.
    Statement posting begins 7:00 PM Eastern time the business day prior to
                                 distribution.
<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
                                                     DISTRIBUTIONS IN DOLLARS
                                       PRIOR                                                                               CURRENT
                    ORIGINAL       PRINCIPAL                                                 REALIZED      DEFERRED      PRINCIPAL
CLASS             FACE VALUE         BALANCE      INTEREST     PRINCIPAL          TOTAL        LOSSES      INTEREST        BALANCE
------------------------------------------------------------------------------------------------------------------------------------
<S>            <C>             <C>              <C>         <C>            <C>                 <C>           <C>     <C>

P1-M               21,501.00        8,264.12         0.00           9.27           9.27        0.00          0.00          8,254.85
P2-M              350,133.00      239,947.21         0.00       1,295.78       1,295.78        0.00          0.00        238,651.43
X1-M *        142,084,361.67   77,125,934.22    32,966.55           0.00      32,966.55        0.00          0.00     75,331,764.90
X2-M *        187,559,494.52   90,526,880.96    16,161.41           0.00      16,161.41        0.00          0.00     87,987,462.46
Y1                 71,698.81       38,501.81       216.57       1,157.07       1,373.64        0.00          0.00         37,344.74
Y2                 99,676.65       47,185.55       255.59       1,599.21       1,854.80        0.00          0.00         45,586.34
Z1            143,556,266.44   78,241,968.24   440,111.07   1,794,338.92   2,234,449.99        0.00          0.00     76,447,629.32
Z2            199,253,620.42   98,490,514.98   533,490.28   2,580,763.28   3,114,253.56        0.00          0.00     95,909,751.70
R-I                    50.00            0.00         0.00           0.00           0.00        0.00          0.00              0.00
------------------------------------------------------------------------------------------------------------------------------------
TOTALS        343,352,946.32  177,066,381.91 1,023,201.47   4,379,163.53   5,402,365.00        0.00          0.00    172,687,218.38
------------------------------------------------------------------------------------------------------------------------------------
  *Notional Class Balance
</TABLE>


<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
                            FACTOR INFORMATION PER $1000 OF ORIGINAL FACE                                     PASS-THROUGH
                                       PRIOR                                                  CURRENT            RATES
                                   PRINCIPAL                                                PRINCIPAL
     CLASS          CUSIP            BALANCE      INTEREST     PRINCIPAL          TOTAL       BALANCE       CURRENT           NEXT
------------------------------------------------------------------------------------------------------------------------------------
<S>             <C>               <C>            <C>           <C>            <C>           <C>           <C>           <C>

P1-M                              384.359797     0.000000       0.431143       0.431143     383.928654    0.00000       0.000000%
P2-M                              685.303042     0.000000       3.700822       3.700822     681.602220    0.00000       0.000000%
X1-M *                            542.817896     0.232021       0.000000       0.232021     530.190402    0.51292       0.512925%
X2-M *                            482.656883     0.086167       0.000000       0.086167     469.117614    0.21423       0.214231%
Y1                                536.993691     3.020552      16.137938      19.158491     520.855767    6.75000       6.750000%
Y2                                473.386201     2.564191      16.043979      18.608171     457.342223    6.50000       6.500000%
Z1                                545.026492     3.065774      12.499203      15.564977     532.527289    6.75000       6.750000%
Z2                                494.297242     2.677443      12.952153      15.629596     481.345089    6.50000       6.500000%
R-I              055240DQ5          0.000000     0.000000       0.000000       0.000000       0.000000    6.75000       6.750000%



------------------------------------------------------------------------------------------------------------------------------------
SELLER:                                    Bank of America                      ADMINISTRATOR:                Eiko Akiyama
SERVICER:                                  Bank of America                                                   Deutsche Bank
LEAD UNDERWRITER:                    Donaldson, Lufkin & Jenrette                                       1761 E. St. Andrew Place
RECORD DATE:                             September 28, 2001                                               Santa Ana, CA 92705
DISTRIBUTION DATE:                        October 25, 2001                      FACTOR INFORMATION:         (800) 735-7777
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>

                                    Page 1 of 5 (C) COPYRIGHT 2001 Deutsche Bank


<PAGE>


                          BA MORTGAGE SECURITIES, INC.
                       MORTGAGE PASS-THROUGH CERTIFICATES
                                  SERIES 1998-1

                         STATEMENT TO CERTIFICATEHOLDERS

 Statements are available online at http://www-apps.gis.deutsche-bank.com/invr.
    Statement posting begins 7:00 PM Eastern time the business day prior to
                                 distribution.
<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
                                                     DISTRIBUTIONS IN DOLLARS
                                       PRIOR                                                                               CURRENT
                    ORIGINAL       PRINCIPAL                                                 REALIZED      DEFERRED      PRINCIPAL
CLASS             FACE VALUE         BALANCE      INTEREST     PRINCIPAL          TOTAL        LOSSES      INTEREST        BALANCE
------------------------------------------------------------------------------------------------------------------------------------
<S>            <C>            <C>               <C>         <C>            <C>                 <C>           <C>     <C>

IA-1           96,101,504.00   30,902,471.59   173,826.40   1,791,281.68   1,965,108.08        0.00          0.00     29,111,189.91
IA-2            5,000,000.00    5,000,000.00    28,125.00           0.00      28,125.00        0.00          0.00      5,000,000.00
IA-3            9,500,000.00    9,500,000.00    53,437.50           0.00      53,437.50        0.00          0.00      9,500,000.00
IA-4           14,250,000.00   14,250,000.00    80,156.25           0.00      80,156.25        0.00          0.00     14,250,000.00
IA-5            4,887,000.00    4,887,000.00    27,489.38           0.00      27,489.38        0.00          0.00      4,887,000.00
IA-6            9,939,000.00    9,939,000.00    55,906.88           0.00      55,906.88        0.00          0.00      9,939,000.00
I-X *          11,983,709.00    5,860,719.16    32,966.53           0.00      32,966.53        0.00          0.00      5,725,243.76
I-PO               21,501.00        8,264.12         0.00           9.27           9.27        0.00          0.00          8,254.85
IIA-1         121,111,453.00   58,648,712.98   317,680.53   1,598,547.45   1,916,227.98        0.00          0.00     57,050,165.53
IIA-2           1,000,000.00      288,742.80     1,564.02      18,077.26      19,641.28        0.00          0.00        270,665.54
IIA-3           8,262,000.00    8,262,000.00    44,752.50           0.00      44,752.50        0.00          0.00      8,262,000.00
IIA-4          14,913,749.00   12,653,276.01    68,538.58      64,058.87     132,597.45        0.00          0.00     12,589,217.14
IIA-5          46,447,250.00   14,025,463.66    75,971.26     878,089.53     954,060.79        0.00          0.00     13,147,374.13
IIA-6           2,127,000.00            0.00         0.00           0.00           0.00        0.00          0.00              0.00
II-X *          7,513,508.12    2,983,644.07    16,161.41           0.00      16,161.41        0.00          0.00      2,884,808.22
II-PO             350,133.00      239,947.21         0.00       1,295.78       1,295.78        0.00          0.00        238,651.43

------------------------------------------------------------------------------------------------------------------------------------
TOTALS        333,910,590.00  168,604,878.37   976,576.24   4,351,359.85   5,327,936.09        0.00          0.00    164,253,518.53
------------------------------------------------------------------------------------------------------------------------------------
*Notional Class Balance
</TABLE>


<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
                            FACTOR INFORMATION PER $1000 OF ORIGINAL FACE                                     PASS-THROUGH
                                       PRIOR                                                  CURRENT            RATES
                                   PRINCIPAL                                                PRINCIPAL
     CLASS          CUSIP            BALANCE      INTEREST     PRINCIPAL          TOTAL       BALANCE       CURRENT           NEXT
------------------------------------------------------------------------------------------------------------------------------------
<S>             <C>             <C>              <C>          <C>             <C>            <C>             <C>           <C>

IA-1            055240CT0         321.560749     1.808779      18.639476      20.448255      302.921273      6.75000       6.750000%
IA-2            055240CU7       1,000.000000     5.625000       0.000000       5.625000      1,000.000000    6.75000       6.750000%
IA-3            055240CV5       1,000.000000     5.625000       0.000000       5.625000      1,000.000000    6.75000       6.750000%
IA-4            055240CW3       1,000.000000     5.625000       0.000000       5.625000      1,000.000000    6.75000       6.750000%
IA-5            055240CX1       1,000.000000     5.625001       0.000000       5.625001      1,000.000000    6.75000       6.750000%
IA-6            055240CY9       1,000.000000     5.625001       0.000000       5.625001      1,000.000000    6.75000       6.750000%
I-X *           055240DF9         489.057199     5.624997       0.000000       5.624997      477.752235      6.75000       0.000000%
I-PO            055240DH5         384.359797     0.000000       0.431143       0.431143      383.928654      0.00000       6.500000%
IIA-1           055240CZ6         484.254061     2.623043      13.198978      15.822021      471.055083      6.50000       6.500000%
IIA-2           055240DA0         288.742800     1.564020      18.077260      19.641280      270.665540      6.50000       6.500000%
IIA-3           055240DB8       1,000.000000     5.416667       0.000000       5.416667      1,000.000000    6.50000       6.500000%
IIA-4           055240DC6         848.430265     4.595664       4.295290       8.890954      844.134975      6.50000       6.500000%
IIA-5           055240DD4         301.965427     1.635646      18.905092      20.540738      283.060335      6.50000       6.500000%
IIA-6           055240DE2           0.000000     0.000000       0.000000       0.000000      0.000000        6.50000       6.500000%
II-X *          055240DG7         397.103992     2.150981       0.000000       2.150981      383.949572      6.50000       0.000000%
II-PO           055240DU6         685.303042     0.000000       3.700822       3.700822      681.602220      0.00000       0.000000%



------------------------------------------------------------------------------------------------------------------------------------
SELLER:                                    Bank of America                      ADMINISTRATOR:                Eiko Akiyama
SERVICER:                                  Bank of America                                                   Deutsche Bank
LEAD UNDERWRITER:                    Donaldson, Lufkin & Jenrette                                       1761 E. St. Andrew Place
RECORD DATE:                             September 28, 2001                                               Santa Ana, CA 92705
DISTRIBUTION DATE:                        October 25, 2001                      FACTOR INFORMATION:         (800) 735-7777
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
                                    Page 2 of 5 (C) COPYRIGHT 2001 Deutsche Bank


<PAGE>


                          BA MORTGAGE SECURITIES, INC.
                       MORTGAGE PASS-THROUGH CERTIFICATES
                                  SERIES 1998-1

                         STATEMENT TO CERTIFICATEHOLDERS

 Statements are available online at http://www-apps.gis.deutsche-bank.com/invr.
    Statement posting begins 7:00 PM Eastern time the business day prior to
                                 distribution.
<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
                                                     DISTRIBUTIONS IN DOLLARS
                                       PRIOR                                                                               CURRENT
                    ORIGINAL       PRINCIPAL                                                 REALIZED      DEFERRED      PRINCIPAL
CLASS             FACE VALUE         BALANCE      INTEREST     PRINCIPAL          TOTAL        LOSSES      INTEREST        BALANCE
------------------------------------------------------------------------------------------------------------------------------------
<S>              <C>            <C>             <C>            <C>             <C>             <C>           <C>       <C>
M               3,776,882.00    3,384,600.95    18,650.09      11,121.47      29,771.56        0.00          0.00      3,373,479.48
B-1             2,231,794.00    1,999,991.50    11,020.51       6,571.78      17,592.29        0.00          0.00      1,993,419.72
B-2             1,201,735.00    1,076,918.35     5,934.12       3,538.65       9,472.77        0.00          0.00      1,073,379.70
B-3             1,030,060.00      923,074.11     5,086.39       3,033.13       8,119.52        0.00          0.00        920,040.98
B-4               515,029.00      461,536.16     2,543.19       1,516.56       4,059.75        0.00          0.00        460,019.60
B-5               686,706.32      615,382.47     3,390.93       2,022.09       5,413.02        0.00          0.00        613,360.38
R-II                   50.00            0.00         0.00           0.00           0.00        0.00          0.00              0.00



------------------------------------------------------------------------------------------------------------------------------------
TOTALS          9,442,256.32    8,461,503.54    46,625.23      27,803.68      74,428.91        0.00          0.00      8,433,699.86
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>


<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
                            FACTOR INFORMATION PER $1000 OF ORIGINAL FACE                                     PASS-THROUGH
                                       PRIOR                                                  CURRENT            RATES
                                   PRINCIPAL                                                PRINCIPAL
CLASS              CUSIP            BALANCE      INTEREST       PRINCIPAL         TOTAL       BALANCE       CURRENT           NEXT
------------------------------------------------------------------------------------------------------------------------------------
<S>            <C>                <C>            <C>            <C>            <C>           <C>           <C>           <C>

M              055240DJ1          896.136271     4.937959       2.944617       7.882576      893.191654    6.61233       6.612578%
B-1            055240DK8          896.136247     4.937960       2.944618       7.882578      893.191630    6.61233       6.612578%
B-2            055240DL6          896.136295     4.937961       2.944618       7.882578      893.191677    6.61233       6.612578%
B-3            055240DM4          896.136254     4.937955       2.944615       7.882570      893.191639    6.61233       6.612578%
B-4            055240DN2          896.136256     4.937955       2.944611       7.882566      893.191646    6.61233       6.612578%
B-5            055240DP7          896.136313     4.937962       2.944621       7.882584      893.191692    6.61233       6.612578%
R-II           055240DR3            0.000000     0.000000       0.000000       0.000000      0.000000      6.75000       6.750000%



------------------------------------------------------------------------------------------------------------------------------------
SELLER:                                    Bank of America                      ADMINISTRATOR:                Eiko Akiyama
SERVICER:                                  Bank of America                                                   Deutsche Bank
LEAD UNDERWRITER:                    Donaldson, Lufkin & Jenrette                                       1761 E. St. Andrew Place
RECORD DATE:                             September 28, 2001                                               Santa Ana, CA 92705
DISTRIBUTION DATE:                        October 25, 2001                      FACTOR INFORMATION:         (800) 735-7777
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
                                    Page 3 of 5 (C) COPYRIGHT 2001 Deutsche Bank
<PAGE>


                          BA MORTGAGE SECURITIES, INC.
                       MORTGAGE PASS-THROUGH CERTIFICATES
                                  SERIES 1998-1

                         STATEMENT TO CERTIFICATEHOLDERS

<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
Distribution Date:            October 25, 2001
------------------------------------------------------------------------------------------------------------------------------------

MORTGAGE POOL INFORMATION:                                                  GROUP I                     GROUP II
--------------------------                                                  -------                     --------

<S>                                                                       <C>                         <C>
                BEGINNING BALANCE OF POOL                                      78,288,734.06                     98,777,648.05
                LESS:         SCHEDULED PRINCIPAL                                 (86,779.09)                      (500,063.19)
                              PRINCIPAL PREPAYMENTS                            (1,708,726.18)                    (2,083,595.07)
                              REPURCHASES                                               0.00                              0.00
                              LIQUIDATIONS                                              0.00                              0.00
                              OTHER UNSCHEDULED PRINCIPAL                               0.00                              0.00
                                                                          -------------------                 -----------------
                ENDING BALANCE OF POOL                                         76,493,228.79                     96,193,989.79
                                                                          ===================                 =================

                BEGINNING NUMBER OF LOANS IN POOL                                        251                               341
                ENDING NUMBER OF LOANS IN POOL                                           245                               334

                WEIGHTED AVERAGE REMAINING TERM TO MATURITY                              303                               131
                WEIGHTED AVERAGE NET CONTRACT RATE                                 7.504595%                         7.060137%

                CURRENT REALIZED LOSSES ON THE POOL                                     0.00                              0.00
                CUMULATIVE REALIZED LOSSES ON THE POOL                                  0.00                              0.00

                BEGINNING POOL BALANCE OF PREMIUM LOANS                        77,125,934.22                     90,526,880.96
                STRIPPED INTEREST RATE                                             0.512925%                         0.214231%
</TABLE>

<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
DELINQUENT, BANKRUPTCY,                                                                     LOANS         LOANS         LOANS
FORECLOSURE, AND REO                           30 TO 59      60 TO 89       90 PLUS          IN            IN             IN
LOAN INFORMATION                                 DAYS          DAYS           DAYS       BANKRUPTCY    FORECLOSURE       REO
------------------------------------------------------------------------------------------------------------------------------------
<S>                                           <C>           <C>           <C>            <C>           <C>             <C>
GROUP I     PRINCIPAL BALANCE                 426,758.60       0.00          0.00           0.00       248,921.12          0.00
                 PERCENTAGE OF GROUP BAL.        0.2471%    0.0000%       0.0000%        0.0000%          0.1441%       0.0000%
            NUMBER OF LOANS                            2          0             0              0                1             0
                 PERCENTAGE OF LOANS             0.3454%    0.0000%       0.0000%        0.0000%          0.1727%       0.0000%
GROUP II    PRINCIPAL BALANCE                 241,948.04       0.00          0.00           0.00             0.00          0.00
                 PERCENTAGE OF GROUP BAL.        0.1401%    0.0000%       0.0000%        0.0000%          0.0000%       0.0000%
            NUMBER OF LOANS                            1          0             0              0                0             0
                 PERCENTAGE OF LOANS             0.1727%    0.0000%       0.0000%        0.0000%          0.0000%       0.0000%
------------------------------------------------------------------------------------------------------------------------------------
                GROUP I BOOK VALUE OF REO PROPERTIES                                                             NA
                GROUP II BOOK VALUE OF REO PROPERTIES                                                            NA
</TABLE>

<TABLE>
<CAPTION>
SERVICING INFORMATION:                                                                 GROUP I                         GROUP II
----------------------                                                                 -------                         --------

<S>                                                                           <C>                                <C>
                SERVICING FEES ACCRUED DURING THE CURRENT DUE PERIOD                  16,310.16                         31,245.86
                PLUS:         ADDITIONAL SERVICING COMPENSATION                            0.00                              0.00
                LESS:         AMTS. TO COVER PREPAYMENT INT. SHORTFALL                (6,940.70)                        (4,334.00)
                              DELINQUENT SERVICING FEES                               (2,234.00)                        (3,776.10)
                                                                             -------------------                 -----------------
                SERVICING FEES COLLECTED FOR THE CURRENT DUE PERIOD                    7,135.46                         23,135.76
                                                                             ===================                 =================

                ADVANCED PRINCIPAL                                                    11,559.14                         55,793.25
                ADVANCED INTEREST                                                     64,563.46                         63,752.27
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
                                    Page 4 of 5 (C) COPYRIGHT 2001 Deutsche Bank
<PAGE>


                          BA MORTGAGE SECURITIES, INC.
                       MORTGAGE PASS-THROUGH CERTIFICATES
                                  SERIES 1998-1

                         STATEMENT TO CERTIFICATEHOLDERS
<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
Distribution Date:            October 25, 2001
------------------------------------------------------------------------------------------------------------------------------------
                                                 OTHER                                   CUMULATIVE
                           PREPAYMENT         UNSCHEDULED                 CERTIFICATE      UNPAID                     CUMULATIVE
                           PRINCIPAL           PRINCIPAL                    INTEREST      INTEREST                     REALIZED
     CLASS                DISTRIBUTED         DISTRIBUTED                  SHORTFALL      SHORTFALL                     LOSSES
------------------------------------------------------------------------------------------------------------------------------------
<S>                      <C>                     <C>                          <C>           <C>                          <C>

 CLASS IA-1              1,708,717.34           0.00                          0.00          0.00                         0.00
 CLASS IA-2                      0.00           0.00                          0.00          0.00                         0.00
 CLASS IA-3                      0.00           0.00                          0.00          0.00                         0.00
 CLASS IA-4                      0.00           0.00                          0.00          0.00                         0.00
 CLASS IA-5                      0.00           0.00                          0.00          0.00                         0.00
 CLASS IA-6                      0.00           0.00                          0.00          0.00                         0.00
 CLASS I-X                       0.00           0.00                          0.00          0.00                         0.00
 CLASS I-PO                      8.84           0.00                          0.00          0.00                         0.00
 CLASS IIA-1             1,301,029.67           0.00                          0.00          0.00                         0.00
 CLASS IIA-2                14,712.76           0.00                          0.00          0.00                         0.00
 CLASS IIA-3                     0.00           0.00                          0.00          0.00                         0.00
 CLASS IIA-4                52,136.39           0.00                          0.00          0.00                         0.00
 CLASS IIA-5               714,661.63           0.00                          0.00          0.00                         0.00
 CLASS IIA-6                     0.00           0.00                          0.00          0.00                         0.00
 CLASS II-X                      0.00           0.00                          0.00          0.00                         0.00
 CLASS II-PO                 1,054.61           0.00                          0.00          0.00                         0.00
 CLASS M                         0.00           0.00                          0.00          0.00                         0.00
 CLASS B-1                       0.00           0.00                          0.00          0.00                         0.00
 CLASS B-2                       0.00           0.00                          0.00          0.00                         0.00
 CLASS B-3                       0.00           0.00                          0.00          0.00                         0.00
 CLASS B-4                       0.00           0.00                          0.00          0.00                         0.00
 CLASS B-5                       0.00           0.00                          0.00          0.00                         0.00

------------------------------------------------------------------------------------------------------------------------------------
TOTALS                   3,792,321.25           0.00                          0.00          0.00                         0.00
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>


<TABLE>
<CAPTION>

<S>                                                                                   <C>

                   OTHER REPORTING ITEMS:

                   GROUP I PERCENTAGE                                                          95.14%
                   GROUP I PREPAYMENT PERCENTAGE                                              100.00%
                   GROUP II PERCENTAGE                                                         95.27%
                   GROUP II PREPAYMENT PERCENTAGE                                             100.00%

                   SUBORDINATE PRINCIPAL DISTRIBUTION AMOUNT                                27,803.68
                   HAS THE CREDIT SUPPORT DEPLETION DATE OCCURRED                                  No

                   BANKRUPTCY AMOUNT                                                       100,000.00
                   FRAUD LOSS AMOUNT                                                       119,926.36
                   SPECIAL HAZARD AMOUNT                                                 4,500,664.47
                   EXTRAORDINARY LOSSES FOR THE PRIOR PERIOD                                     0.00

                   GROUP I EXTRAORDINARY LOSSES                                                  0.00
                   GROUP II EXTRAORDINARY LOSSES                                                 0.00
--------------------------------------------------------------------------------------------------------------------------------
</TABLE>
                                    Page 5 of 5 (C) COPYRIGHT 2001 Deutsche Bank


<PAGE>
<TABLE>

                                                    BA MORTGAGE SECURITIES, INC.
                                                 MORTGAGE PASS-THROUGH CERTIFICATES
                                                            SERIES 1998-1

                                                   STATEMENT TO CERTIFICATEHOLDERS

                           Statements are available online at http://www-apps.gis.deutsche-bank.com/invr.
                        Statement posting begins 7:00 PM Eastern time the business day prior to distribution.

                                                      DISTRIBUTIONS IN DOLLARS

<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
                                       PRIOR                                                                                CURRENT
                   ORIGINAL        PRINCIPAL                                                  REALIZED   DEFERRED         PRINCIPAL
CLASS            FACE VALUE          BALANCE     INTEREST      PRINCIPAL          TOTAL         LOSSES   INTEREST           BALANCE
------------------------------------------------------------------------------------------------------------------------------------
<S>          <C>              <C>              <C>          <C>            <C>                    <C>        <C>     <C>
P1-M              21,501.00         8,254.85         0.00           9.32           9.32           0.00       0.00          8,245.53
P2-M             350,133.00       238,651.43         0.00       5,540.52       5,540.52           0.00       0.00        233,110.91
X1-M *       142,084,361.67    75,331,764.90    32,204.50           0.00      32,204.50           0.00       0.00     71,157,177.42
X2-M *       187,559,494.52    87,987,462.46    15,626.04           0.00      15,626.04           0.00       0.00     85,291,290.11
Y1                71,698.81        37,344.74       210.08       3,278.17       3,488.25           0.00       0.00         34,066.57
Y2                99,676.65        45,586.34       246.93       4,169.54       4,416.47           0.00       0.00         41,416.80
Z1           143,556,266.44    76,447,629.32   430,017.91   4,172,643.67   4,602,661.58           0.00       0.00     72,274,985.65
Z2           199,253,620.42    95,909,751.70   519,511.15   2,952,114.34   3,471,625.49           0.00       0.00     92,957,637.36
R-I                   50.00             0.00         0.00           0.00           0.00           0.00       0.00              0.00
------------------------------------------------------------------------------------------------------------------------------------
TOTALS       343,352,946.32   172,687,218.38   997,816.61   7,137,755.56   8,135,572.17           0.00       0.00    165,549,462.82
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>

*Notional Class Balance

<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
                            FACTOR INFORMATION PER $1000 OF ORIGINAL FACE                                    PASS-THROUGH RATES
------------------------------------------------------------------------------------------------------   ---------------------------
                                       PRIOR                                                   CURRENT
                                   PRINCIPAL                                                 PRINCIPAL
CLASS                 CUSIP          BALANCE     INTEREST      PRINCIPAL          TOTAL        BALANCE    CURRENT              NEXT
------------------------------------------------------------------------------------------------------------------------------------
<S>               <C>             <C>            <C>           <C>            <C>           <C>          <C>               <C>
P1-M                              383.928654     0.000000       0.433468       0.433468     383.495186   0.000000%         0.000000%
P2-M                              681.602220     0.000000      15.824044      15.824044     665.778176   0.000000%         0.000000%
X1-M *                            530.190402     0.226658       0.000000       0.226658     500.809354   0.513003%         0.513003%
X2-M *                            469.117614     0.083312       0.000000       0.083312     454.742589   0.213113%         0.213113%
Y1                                520.855767     2.930035      45.721467      48.651501     475.134369   6.750000%         6.750000%
Y2                                457.342223     2.477310      41.830660      44.307971     415.511563   6.500000%         6.500000%
Z1                                532.527289     2.995466      29.066259      32.061725     503.461029   6.750000%         6.750000%
Z2                                481.345089     2.607286      14.815863      17.423149     466.529226   6.500000%         6.500000%
R-I               055240DQ5         0.000000     0.000000       0.000000       0.000000       0.000000   6.750000%         6.750000%

------------------------------------------------------------------------------------------------------------------------------------
SELLER:                               Bank of America                      ADMINISTRATOR:                         Eiko Akiyama
SERVICER:                             Bank of America                                                            Deutsche Bank
LEAD UNDERWRITER:               Donaldson, Lufkin & Jenrette                                                1761 E. St. Andrew Place
RECORD DATE:                          October 31, 2001                                                        Santa Ana, CA 92705
DISTRIBUTION DATE:                   November 26, 2001                     FACTOR INFORMATION:                   (800) 735-7777
------------------------------------------------------------------------------------------------------------------------------------
                                                             Page 1 of 5                            (C) COPYRIGHT 2001 Deutsche Bank
</TABLE>

<PAGE>

<TABLE>
                                                    BA MORTGAGE SECURITIES, INC.
                                                 MORTGAGE PASS-THROUGH CERTIFICATES
                                                            SERIES 1998-1

                                                   STATEMENT TO CERTIFICATEHOLDERS

                           Statements are available online at http://www-apps.gis.deutsche-bank.com/invr.
                        Statement posting begins 7:00 PM Eastern time the business day prior to distribution.

<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
                                       PRIOR                                                                                CURRENT
                   ORIGINAL        PRINCIPAL                                                  REALIZED   DEFERRED         PRINCIPAL
CLASS            FACE VALUE          BALANCE     INTEREST      PRINCIPAL          TOTAL         LOSSES   INTEREST           BALANCE
------------------------------------------------------------------------------------------------------------------------------------
<S>          <C>              <C>              <C>          <C>            <C>                    <C>        <C>     <C>
IA-1          96,101,504.00    29,111,189.91   163,750.44   4,171,792.11   4,335,542.55           0.00       0.00     24,939,397.80
IA-2           5,000,000.00     5,000,000.00    28,125.00           0.00      28,125.00           0.00       0.00      5,000,000.00
IA-3           9,500,000.00     9,500,000.00    53,437.50           0.00      53,437.50           0.00       0.00      9,500,000.00
IA-4          14,250,000.00    14,250,000.00    80,156.25           0.00      80,156.25           0.00       0.00     14,250,000.00
IA-5           4,887,000.00     4,887,000.00    27,489.38           0.00      27,489.38           0.00       0.00      4,887,000.00
IA-6           9,939,000.00     9,939,000.00    55,906.88           0.00      55,906.88           0.00       0.00      9,939,000.00
I-X *         11,983,709.00     5,725,243.76    32,204.50           0.00      32,204.50           0.00       0.00      5,364,836.10
I-PO              21,501.00         8,254.85         0.00           9.32           9.32           0.00       0.00          8,245.53
IIA-1        121,111,453.00    57,050,165.53   309,021.73   1,832,054.49   2,141,076.22           0.00       0.00     55,218,111.04
IIA-2          1,000,000.00       270,665.54     1,466.11      20,898.44      22,364.55           0.00       0.00        249,767.10
IIA-3          8,262,000.00     8,262,000.00    44,752.50           0.00      44,752.50           0.00       0.00      8,262,000.00
IIA-4         14,913,749.00    12,589,217.14    68,191.59      64,465.87     132,657.46           0.00       0.00     12,524,751.27
IIA-5         46,447,250.00    13,147,374.13    71,214.94   1,015,125.85   1,086,340.79           0.00       0.00     12,132,248.28
IIA-6          2,127,000.00             0.00         0.00           0.00           0.00           0.00       0.00              0.00
II-X *         7,513,508.12     2,884,808.22    15,626.04           0.00      15,626.04           0.00       0.00      2,736,024.76
II-PO            350,133.00       238,651.43         0.00       5,540.52       5,540.52           0.00       0.00        233,110.91
------------------------------------------------------------------------------------------------------------------------------------
TOTALS       333,910,590.00   164,253,518.53   951,342.86   7,109,886.60   8,061,229.46           0.00       0.00    157,143,631.93
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>

*Notional Class Balance

<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
                            FACTOR INFORMATION PER $1000 OF ORIGINAL FACE                                    PASS-THROUGH RATES
------------------------------------------------------------------------------------------------------   ---------------------------
                                       PRIOR                                                   CURRENT
                                   PRINCIPAL                                                 PRINCIPAL
CLASS                 CUSIP          BALANCE     INTEREST      PRINCIPAL          TOTAL        BALANCE    CURRENT              NEXT
------------------------------------------------------------------------------------------------------------------------------------
<S>               <C>           <C>              <C>           <C>            <C>         <C>            <C>               <C>
IA-1              055240CT0       302.921273     1.703932      43.410269      45.114201     259.511004   6.750000%         6.750000%
IA-2              055240CU7     1,000.000000     5.625000       0.000000       5.625000   1,000.000000   6.750000%         6.750000%
IA-3              055240CV5     1,000.000000     5.625000       0.000000       5.625000   1,000.000000   6.750000%         6.750000%
IA-4              055240CW3     1,000.000000     5.625000       0.000000       5.625000   1,000.000000   6.750000%         6.750000%
IA-5              055240CX1     1,000.000000     5.625001       0.000000       5.625001   1,000.000000   6.750000%         6.750000%
IA-6              055240CY9     1,000.000000     5.625001       0.000000       5.625001   1,000.000000   6.750000%         6.750000%
I-X *             055240DF9       477.752235     5.625001       0.000000       5.625001     447.677435   6.750000%         0.000000%
I-PO              055240DH5       383.928654     0.000000       0.433468       0.433468     383.495186   0.000000%         6.500000%
IIA-1             055240CZ6       471.055083     2.551548      15.127013      17.678561     455.928070   6.500000%         6.500000%
IIA-2             055240DA0       270.665540     1.466110      20.898440      22.364550     249.767100   6.500000%         6.500000%
IIA-3             055240DB8     1,000.000000     5.416667       0.000000       5.416667   1,000.000000   6.500000%         6.500000%
IIA-4             055240DC6       844.134975     4.572398       4.322580       8.894977     839.812395   6.500000%         6.500000%
IIA-5             055240DD4       283.060335     1.533243      21.855457      23.388700     261.204878   6.500000%         6.500000%
IIA-6             055240DE2         0.000000     0.000000       0.000000       0.000000       0.000000   6.500000%         6.500000%
II-X *            055240DG7       383.949572     2.079726       0.000000       2.079726     364.147442   6.500000%         0.000000%
II-PO             055240DU6       681.602220     0.000000      15.824044      15.824044     665.778176   0.000000%         0.000000%

------------------------------------------------------------------------------------------------------------------------------------
SELLER:                               Bank of America                      ADMINISTRATOR:                         Eiko Akiyama
SERVICER:                             Bank of America                                                            Deutsche Bank
LEAD UNDERWRITER:               Donaldson, Lufkin & Jenrette                                                1761 E. St. Andrew Place
RECORD DATE:                          October 31, 2001                                                        Santa Ana, CA 92705
DISTRIBUTION DATE:                   November 26, 2001                     FACTOR INFORMATION:                   (800) 735-7777
------------------------------------------------------------------------------------------------------------------------------------
                                                             Page 2 of 5                            (C) COPYRIGHT 2001 Deutsche Bank
</TABLE>

<PAGE>

<TABLE>
                                                    BA MORTGAGE SECURITIES, INC.
                                                 MORTGAGE PASS-THROUGH CERTIFICATES
                                                            SERIES 1998-1

                                                   STATEMENT TO CERTIFICATEHOLDERS

                           Statements are available online at http://www-apps.gis.deutsche-bank.com/invr.
                        Statement posting begins 7:00 PM Eastern time the business day prior to distribution.

<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
                                       PRIOR                                                                                CURRENT
                   ORIGINAL        PRINCIPAL                                                  REALIZED   DEFERRED         PRINCIPAL
CLASS            FACE VALUE          BALANCE     INTEREST      PRINCIPAL          TOTAL         LOSSES   INTEREST           BALANCE
------------------------------------------------------------------------------------------------------------------------------------
<S>            <C>              <C>             <C>            <C>            <C>                 <C>        <C>       <C>
M              3,776,882.00     3,373,479.48    18,589.50      11,147.59      29,737.09           0.00       0.00      3,362,331.89
B-1            2,231,794.00     1,993,419.72    10,984.70       6,587.21      17,571.91           0.00       0.00      1,986,832.51
B-2            1,201,735.00     1,073,379.70     5,914.84       3,546.96       9,461.80           0.00       0.00      1,069,832.74
B-3            1,030,060.00       920,040.98     5,069.87       3,040.25       8,110.12           0.00       0.00        917,000.73
B-4              515,029.00       460,019.60     2,534.93       1,520.12       4,055.05           0.00       0.00        458,499.48
B-5              686,706.32       613,360.38     3,379.91       2,026.83       5,406.74           0.00       0.00        611,333.55
R-II                  50.00             0.00         0.00           0.00           0.00           0.00       0.00              0.00
------------------------------------------------------------------------------------------------------------------------------------
TOTALS         9,442,256.32     8,433,699.86    46,473.75      27,868.96      74,342.71           0.00       0.00      8,405,830.90
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>

<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
                            FACTOR INFORMATION PER $1000 OF ORIGINAL FACE                                    PASS-THROUGH RATES
------------------------------------------------------------------------------------------------------   ---------------------------
                                       PRIOR                                                   CURRENT
                                   PRINCIPAL                                                 PRINCIPAL
CLASS                 CUSIP          BALANCE     INTEREST      PRINCIPAL          TOTAL        BALANCE    CURRENT              NEXT
------------------------------------------------------------------------------------------------------------------------------------
<S>               <C>             <C>            <C>            <C>            <C>          <C>          <C>               <C>
M                 055240DJ1       893.191654     4.921917       2.951533       7.873450     890.240121   6.612578%         6.612828%
B-1               055240DK8       893.191630     4.921915       2.951531       7.873446     890.240098   6.612578%         6.612828%
B-2               055240DL6       893.191677     4.921917       2.951533       7.873450     890.240144   6.612578%         6.612828%
B-3               055240DM4       893.191639     4.921917       2.951527       7.873444     890.240112   6.612578%         6.612828%
B-4               055240DN2       893.191646     4.921917       2.951523       7.873440     890.240122   6.612578%         6.612828%
B-5               055240DP7       893.191692     4.921915       2.951524       7.873439     890.240168   6.612578%         6.612828%
R-II              055240DR3         0.000000     0.000000       0.000000       0.000000       0.000000   6.750000%         6.750000%

------------------------------------------------------------------------------------------------------------------------------------
SELLER:                               Bank of America                      ADMINISTRATOR:                         Eiko Akiyama
SERVICER:                             Bank of America                                                            Deutsche Bank
LEAD UNDERWRITER:               Donaldson, Lufkin & Jenrette                                                1761 E. St. Andrew Place
RECORD DATE:                          October 31, 2001                                                        Santa Ana, CA 92705
DISTRIBUTION DATE:                   November 26, 2001                     FACTOR INFORMATION:                   (800) 735-7777
------------------------------------------------------------------------------------------------------------------------------------
                                                             Page 3 of 5                            (C) COPYRIGHT 2001 Deutsche Bank
</TABLE>

<PAGE>

<TABLE>
                                                    BA MORTGAGE SECURITIES, INC.
                                                 MORTGAGE PASS-THROUGH CERTIFICATES
                                                            SERIES 1998-1

                                                   STATEMENT TO CERTIFICATEHOLDERS

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

Distribution Date: November 26, 2001
------------------------------------------------------------------------------------------------------------------------------------

<CAPTION>
MORTGAGE POOL INFORMATION:                                GROUP I          GROUP II
--------------------------                                -------          --------
<S>                                                    <C>               <C>
BEGINNING BALANCE OF POOL                              76,493,228.79     96,193,989.79
LESS: SCHEDULED PRINCIPAL                                 (83,179.71)      (492,549.21)
      PRINCIPAL PREPAYMENTS                            (4,092,751.46)    (2,469,275.19)
      REPURCHASES                                               0.00              0.00
      LIQUIDATIONS                                              0.00              0.00
      OTHER UNSCHEDULED PRINCIPAL                               0.00              0.00
                                                       -------------     -------------
ENDING BALANCE OF POOL                                 72,317,297.62     93,232,165.39
                                                       =============     =============

BEGINNING NUMBER OF LOANS IN POOL                                245               334
ENDING NUMBER OF LOANS IN POOL                                   233               325

WEIGHTED AVERAGE REMAINING TERM TO MATURITY                      301               130
WEIGHTED AVERAGE NET CONTRACT RATE                          7.504485%         7.057630%

CURRENT REALIZED LOSSES ON THE POOL                             0.00              0.00
CUMULATIVE REALIZED LOSSES ON THE POOL                          0.00              0.00

BEGINNING POOL BALANCE OF PREMIUM LOANS                75,331,764.90     87,987,462.46
STRIPPED INTEREST RATE                                      0.513003%         0.213113%
</TABLE>

<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
DELINQUENT, BANKRUPTCY,                                                                     LOANS          LOANS       LOANS
FORECLOSURE, AND REO                                30 TO 59      60 TO 89     90 PLUS        IN            IN           IN
LOAN INFORMATION                                      DAYS          DAYS        DAYS      BANKRUPTCY    FORECLOSURE     REO
------------------------------------------------------------------------------------------------------------------------------------
<S>        <C>                                     <C>           <C>            <C>           <C>        <C>           <C>
GROUP I    PRINCIPAL BALANCE                       582,925.97    229,050.89       0.00          0.00     248,647.42      0.00
           PERCENTAGE OF GROUP BAL.                    0.3521%       0.1384%    0.0000%       0.0000%        0.1502%   0.0000%
           -------------------------------------------------------------------------------------------------------------------------
           NUMBER OF LOANS                                  2             1          0             0              1         0
           PERCENTAGE OF LOANS                         0.3584%       0.1792%    0.0000%       0.0000%        0.1792%   0.0000%
------------------------------------------------------------------------------------------------------------------------------------
GROUP II   PRINCIPAL BALANCE                             0.00    240,808.15       0.00          0.00           0.00      0.00
           PERCENTAGE OF GROUP BAL.                    0.0000%       0.1455%    0.0000%       0.0000%        0.0000%   0.0000%
           -------------------------------------------------------------------------------------------------------------------------
           NUMBER OF LOANS                                  0             1          0             0              0         0
           PERCENTAGE OF LOANS                         0.0000%       0.1792%    0.0000%       0.0000%        0.0000%   0.0000%
------------------------------------------------------------------------------------------------------------------------------------

           GROUP I BOOK VALUE OF REO PROPERTIES                                                             NA
           GROUP II BOOK VALUE OF REO PROPERTIES                                                            NA
</TABLE>

<TABLE>
<CAPTION>
SERVICING INFORMATION:                                    GROUP I          GROUP II
----------------------                                    -------          --------
<S>                                                       <C>                <C>
SERVICING FEES ACCRUED DURING THE CURRENT DUE PERIOD       15,936.09         30,367.19
PLUS: ADDITIONAL SERVICING COMPENSATION                         0.00              0.00
LESS: AMTS. TO COVER PREPAYMENT INT. SHORTFALL            (11,560.03)        (6,539.43)
      DELINQUENT SERVICING FEES                            (1,876.74)        (2,573.06)
                                                       -------------     -------------
SERVICING FEES COLLECTED FOR THE CURRENT DUE PERIOD         2,499.32         21,254.70
                                                       =============     =============

ADVANCED PRINCIPAL                                          9,679.35         44,152.37
ADVANCED INTEREST                                          53,860.33         49,100.90

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                                                             Page 4 of 5                            (C) COPYRIGHT 2001 Deutsche Bank
</TABLE>

<PAGE>

<TABLE>
                                                    BA MORTGAGE SECURITIES, INC.
                                                 MORTGAGE PASS-THROUGH CERTIFICATES
                                                            SERIES 1998-1

                                                   STATEMENT TO CERTIFICATEHOLDERS

------------------------------------------------------------------------------------------------------------------------------------
Distribution Date: November 26, 2001
------------------------------------------------------------------------------------------------------------------------------------

<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
                                                   OTHER                                          CUMULATIVE
                       PREPAYMENT               UNSCHEDULED              CERTIFICATE                UNPAID                CUMULATIVE
                       PRINCIPAL                 PRINCIPAL                INTEREST                 INTEREST                REALIZED
   CLASS              DISTRIBUTED               DISTRIBUTED               SHORTFALL               SHORTFALL                 LOSSES
------------------------------------------------------------------------------------------------------------------------------------
<S>                   <C>                              <C>                      <C>                     <C>                     <C>
CLASS IA-1            4,092,742.32                     0.00                     0.00                    0.00                    0.00
CLASS IA-2                    0.00                     0.00                     0.00                    0.00                    0.00
CLASS IA-3                    0.00                     0.00                     0.00                    0.00                    0.00
CLASS IA-4                    0.00                     0.00                     0.00                    0.00                    0.00
CLASS IA-5                    0.00                     0.00                     0.00                    0.00                    0.00
CLASS IA-6                    0.00                     0.00                     0.00                    0.00                    0.00
 CLASS I-X                    0.00                     0.00                     0.00                    0.00                    0.00
CLASS I-PO                    9.14                     0.00                     0.00                    0.00                    0.00
CLASS IIA-1           1,539,726.19                     0.00                     0.00                    0.00                    0.00
CLASS IIA-2              17,563.82                     0.00                     0.00                    0.00                    0.00
CLASS IIA-3                   0.00                     0.00                     0.00                    0.00                    0.00
CLASS IIA-4              54,179.49                     0.00                     0.00                    0.00                    0.00
CLASS IIA-5             853,149.22                     0.00                     0.00                    0.00                    0.00
CLASS IIA-6                   0.00                     0.00                     0.00                    0.00                    0.00
CLASS II-X                    0.00                     0.00                     0.00                    0.00                    0.00
CLASS II-PO               4,656.46                     0.00                     0.00                    0.00                    0.00
  CLASS M                     0.00                     0.00                     0.00                    0.00                    0.00
 CLASS B-1                    0.00                     0.00                     0.00                    0.00                    0.00
 CLASS B-2                    0.00                     0.00                     0.00                    0.00                    0.00
 CLASS B-3                    0.00                     0.00                     0.00                    0.00                    0.00
 CLASS B-4                    0.00                     0.00                     0.00                    0.00                    0.00
 CLASS B-5                    0.00                     0.00                     0.00                    0.00                    0.00
------------------------------------------------------------------------------------------------------------------------------------
  TOTALS              6,562,026.65                     0.00                     0.00                    0.00                    0.00
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>

<TABLE>
<CAPTION>
OTHER REPORTING ITEMS:
----------------------
<S>                                                                <C>
GROUP I PERCENTAGE                                                        95.03%
GROUP I PREPAYMENT PERCENTAGE                                            100.00%
GROUP II PERCENTAGE                                                       95.17%
GROUP II PREPAYMENT PERCENTAGE                                           100.00%

SUBORDINATE PRINCIPAL DISTRIBUTION AMOUNT                             27,868.97
HAS THE CREDIT SUPPORT DEPLETION DATE OCCURRED                               No

BANKRUPTCY AMOUNT                                                    100,000.00
FRAUD LOSS AMOUNT                                                    119,926.36
SPECIAL HAZARD AMOUNT                                              4,500,664.47
EXTRAORDINARY LOSSES FOR THE PRIOR PERIOD                                  0.00

GROUP I EXTRAORDINARY LOSSES                                               0.00
GROUP II EXTRAORDINARY LOSSES                                              0.00

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                                                             Page 5 of 5                            (C) COPYRIGHT 2001 Deutsche Bank
</TABLE>