EXHIBIT 99.1

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

<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       8,357.97          0.00          8.72           8.72          0.00          0.00       8,349.25
     P2-M          350,133.00     282,441.39          0.00     11,019.48      11,019.48          0.00          0.00     271,421.91
     X1-M *    142,084,361.67  89,096,234.31     38,517.30          0.00      38,517.30          0.00          0.00  88,326,641.85
     X2-M *    187,559,494.52 108,621,411.05     19,640.36          0.00      19,640.36          0.00          0.00 107,244,966.40
     Y1             71,698.81      44,410.23        249.81         48.62         298.43          0.00          0.00      44,361.61
     Y2             99,676.65      56,472.16        305.89        257.40         563.29          0.00          0.00      56,214.76
     Z1        143,556,266.44  90,220,477.42    507,490.19    770,780.64   1,278,270.83          0.00          0.00  89,449,696.78
     Z2        199,253,620.42 117,849,436.25    638,351.10  1,662,219.81   2,300,570.91          0.00          0.00 116,187,216.44
     R-I                50.00           0.00          0.00          0.00           0.00          0.00          0.00           0.00

------------------------------------------------------------------------------------------------------------------------------------
TOTALS         343,352,946.32 208,461,595.42  1,204,554.65  2,444,334.67   3,648,889.32          0.00          0.00 206,017,260.75
------------------------------------------------------------------------------------------------------------------------------------
  *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                         388.724710      0.000000      0.405563       0.405563    388.319148     0.000000%      0.000000%
     P2-M                         806.668866      0.000000     31.472269      31.472269    775.196597     0.000000%      0.000000%
     X1-M *                       627.065732      0.271088      0.000000       0.271088    621.649285     0.518773%      0.518773%
     X2-M *                       579.130432      0.104715      0.000000       0.104715    571.791722     0.216978%      0.216978%
     Y1                           619.399798      3.484158      0.678051       4.162209    618.721684     6.750000%      6.750000%
     Y2                           566.553559      3.068823      2.582336       5.651159    563.971209     6.500000%      6.500000%
     Z1                           628.467706      3.535131      5.369188       8.904319    623.098517     6.750000%      6.750000%
     Z2                           591.454429      3.203711      8.342231      11.545943    583.112197     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:              Barbara Campbell
SERVICER:                                  Bank of America                                                   Deutsche Bank
LEAD UNDERWRITER:                    Donaldson, Lufkin & Jenrette                                       1761 E. St. Andrew Place
RECORD DATE:                              November 30, 2000                                               Santa Ana, CA 92705
DISTRIBUTION DATE:                        December 26, 2000                     FACTOR INFORMATION:          (800) 735-7777
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>

                                    Page 1 of 5 (C) COPYRIGHT 2000 Deutsche Bank


<PAGE>


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

<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  42,846,242.73    241,010.12    766,889.39   1,007,899.51          0.00          0.00  42,079,353.34
     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   6,847,519.71     38,517.27          0.00      38,517.27          0.00          0.00   6,783,963.80
     I-PO           21,501.00       8,357.97          0.00          8.72           8.72          0.00          0.00       8,349.25
     IIA-1     121,111,453.00  70,606,955.59    382,454.34  1,024,899.69   1,407,354.03          0.00          0.00  69,582,055.90
     IIA-2       1,000,000.00     421,215.33      2,281.58     11,217.09      13,498.67          0.00          0.00     409,998.24
     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  13,269,202.70     71,874.85     59,564.26     131,439.11          0.00          0.00  13,209,638.44
     IIA-5      46,447,250.00  20,460,217.76    110,826.18    544,861.92     655,688.10          0.00          0.00  19,915,355.84
     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   3,625,913.33     19,640.36          0.00      19,640.36          0.00          0.00   3,588,676.07
     II-PO         350,133.00     282,441.39          0.00     11,019.48      11,019.48          0.00          0.00     271,421.91

------------------------------------------------------------------------------------------------------------------------------------
TOTALS         333,910,590.00 199,732,633.47  1,156,472.21  2,418,460.55   3,574,932.76          0.00          0.00 197,314,172.92
------------------------------------------------------------------------------------------------------------------------------------
  *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         445.843623      2.507870      7.979994      10.487864    437.863629     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         571.402369      5.624996      0.000000       5.624996    566.098843     6.750000%      0.000000%
     I-PO       055240DH5         388.724710      0.000000      0.405563       0.405563    388.319148     0.000000%      6.500000%
     IIA-1      055240CZ6         582.991566      3.157871      8.462451      11.620322    574.529115     6.500000%      6.500000%
     IIA-2      055240DA0         421.215330      2.281580     11.217090      13.498670    409.998240     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         889.729517      4.819368      3.993916       8.813285    885.735601     6.500000%      6.500000%
     IIA-5      055240DD4         440.504395      2.386065     11.730768      14.116834    428.773627     6.500000%      6.500000%
     IIA-6      055240DE2           0.000000      0.000000      0.000000       0.000000      0.000000     6.500000%      6.500000%
     II-X *     055240DG7         482.585934      2.614007      0.000000       2.614007    477.629892     6.500000%      0.000000%
     II-PO      055240DU6         806.668866      0.000000     31.472269      31.472269    775.196597     0.000000%      0.000000%



------------------------------------------------------------------------------------------------------------------------------------
SELLER:                                    Bank of America                      ADMINISTRATOR:              Barbara Campbell
SERVICER:                                  Bank of America                                                   Deutsche Bank
LEAD UNDERWRITER:                    Donaldson, Lufkin & Jenrette                                       1761 E. St. Andrew Place
RECORD DATE:                              November 30, 2000                                               Santa Ana, CA 92705
DISTRIBUTION DATE:                        December 26, 2000                     FACTOR INFORMATION:          (800) 735-7777
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
                                    Page 2 of 5 (C) COPYRIGHT 2000 Deutsche Bank


<PAGE>


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


<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   3,491,584.32     19,232.97     10,349.65      29,582.62          0.00          0.00   3,481,234.67
     B-1         2,231,794.00   2,063,208.96     11,364.94      6,115.70      17,480.64          0.00          0.00   2,057,093.26
     B-2         1,201,735.00   1,110,958.51      6,119.58      3,293.07       9,412.65          0.00          0.00   1,107,665.44
     B-3         1,030,060.00     952,251.42      5,245.36      2,822.63       8,067.99          0.00          0.00     949,428.79
     B-4           515,029.00     476,124.79      2,622.68      1,411.31       4,033.99          0.00          0.00     474,713.48
     B-5           686,706.32     634,833.95      3,496.91      1,881.76       5,378.67          0.00          0.00     632,952.19
     R-II               50.00           0.00          0.00          0.00           0.00          0.00          0.00           0.00

------------------------------------------------------------------------------------------------------------------------------------
TOTALS           9,442,256.32   8,728,961.95     48,082.44     25,874.12      73,956.56          0.00          0.00   8,703,087.83
------------------------------------------------------------------------------------------------------------------------------------
</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         924.462115      5.092288      2.740263       7.832551    921.721852     6.610054%      6.610268%
     B-1        055240DK8         924.462096      5.092289      2.740262       7.832551    921.721835     6.610054%      6.610268%
     B-2        055240DL6         924.462140      5.092287      2.740263       7.832550    921.721877     6.610054%      6.610268%
     B-3        055240DM4         924.462090      5.092286      2.740258       7.832544    921.721832     6.610054%      6.610268%
     B-4        055240DN2         924.462098      5.092296      2.740253       7.832549    921.721845     6.610054%      6.610268%
     B-5        055240DP7         924.462076      5.092293      2.740265       7.832558    921.721807     6.610054%      6.610268%
     R-II       055240DR3           0.000000      0.000000      0.000000       0.000000      0.000000     6.750000%      6.750000%

------------------------------------------------------------------------------------------------------------------------------------
SELLER:                                    Bank of America                      ADMINISTRATOR:              Barbara Campbell
SERVICER:                                  Bank of America                                                   Deutsche Bank
LEAD UNDERWRITER:                    Donaldson, Lufkin & Jenrette                                       1761 E. St. Andrew Place
RECORD DATE:                              November 30, 2000                                               Santa Ana, CA 92705
DISTRIBUTION DATE:                        December 26, 2000                     FACTOR INFORMATION:          (800) 735-7777
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
                                    Page 3 of 5 (C) COPYRIGHT 2000 Deutsche Bank


<PAGE>


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

                         STATEMENT TO CERTIFICATEHOLDERS
<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
Distribution Date:            December 26, 2000
------------------------------------------------------------------------------------------------------------------------------------


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

<S>                                                                       <C>                         <C>
                BEGINNING BALANCE OF POOL                                 90,273,245.61               118,188,350.09
                LESS:         SCHEDULED PRINCIPAL                            (92,557.58)                (530,501.56)
                              PRINCIPAL PREPAYMENTS                         (678,280.41)              (1,142,995.12)
                              REPURCHASES                                          0.00                        0.00
                              LIQUIDATIONS                                         0.00                        0.00
                              OTHER UNSCHEDULED PRINCIPAL                          0.00                        0.00
                                                                          -------------               --------------
                ENDING BALANCE OF POOL                                    89,502,407.62               116,514,853.41
                                                                          =============               ==============

                BEGINNING NUMBER OF LOANS IN POOL                                   288                         384
                ENDING NUMBER OF LOANS IN POOL                                      286                         381

                WEIGHTED AVERAGE REMAINING TERM TO MATURITY                         315                         142
                WEIGHTED AVERAGE NET CONTRACT RATE                            7.511385%                   7.067968%

                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                   89,096,234.31               108,621,411.05
                STRIPPED INTEREST RATE                                        0.518773%                   0.216978%
</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     240,779.88    251,570.84          0.00           0.00
                     PERCENTAGE OF GROUP BAL.      0.0000%       0.0000%        0.1169%       0.1221%       0.0000%        0.0000%
                NUMBER OF LOANS                          0             0              1             1             0              0
                     PERCENTAGE OF LOANS           0.0000%       0.0000%        0.1499%       0.1499%       0.0000%        0.0000%
GROUP II        PRINCIPAL BALANCE               240,903.18          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           0.1499%       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          18,806.93                   37,828.87
                PLUS:         ADDITIONAL SERVICING COMPENSATION                    0.00                        0.00
                LESS:         AMTS. TO COVER PREPAYMENT INT. SHORTFALL        (3,371.67)                  (2,089.06)
                              DELINQUENT SERVICING FEES                       (1,843.79)                   3,464.38
                                                                          -------------               --------------
                SERVICING FEES COLLECTED FOR THE CURRENT DUE PERIOD           13,591.47                   39,204.19
                                                                          =============               ==============

                ADVANCED PRINCIPAL                                             8,637.28                   44,795.46
                ADVANCED INTEREST                                             52,808.31                   56,922.44
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>

                                    Page 4 of 5 (C) COPYRIGHT 2000 Deutsche Bank


<PAGE>


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

                         STATEMENT TO CERTIFICATEHOLDERS

<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
Distribution Date:            December 26, 2000
------------------------------------------------------------------------------------------------------------------------------------
                                                 OTHER                                   CUMULATIVE
                                PREPAYMENT    UNSCHEDULED                 CERTIFICATE      UNPAID                     CUMULATIVE
                                PRINCIPAL      PRINCIPAL                    INTEREST      INTEREST                     REALIZED
     CLASS                     DISTRIBUTED    DISTRIBUTED                  SHORTFALL      SHORTFALL                     LOSSES
------------------------------------------------------------------------------------------------------------------------------------
<S>             <C>               <C>                 <C>                          <C>           <C>                          <C>
       CLASS IA-1                 678,272.70          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                       7.71          0.00                         0.00          0.00                         0.00
       CLASS IIA-1                709,301.27          0.00                         0.00          0.00                         0.00
       CLASS IIA-2                  7,763.00          0.00                         0.00          0.00                         0.00
       CLASS IIA-3                      0.00          0.00                         0.00          0.00                         0.00
       CLASS IIA-4                 41,222.58          0.00                         0.00          0.00                         0.00
       CLASS IIA-5                377,082.03          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                  7,626.24          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                      1,821,275.53          0.00                         0.00          0.00                         0.00
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>


<TABLE>
<CAPTION>

<S>                                                                                                          <C>
                OTHER REPORTING ITEMS:

                GROUP I PERCENTAGE                                                                           95.74%
                GROUP I PREPAYMENT PERCENTAGE                                                               100.00%
                GROUP II PERCENTAGE                                                                          95.86%
                GROUP II PREPAYMENT PERCENTAGE                                                              100.00%

                SUBORDINATE PRINCIPAL DISTRIBUTION AMOUNT                                                 25,874.12
                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 2000 Deutsche Bank


<PAGE>

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


<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      21,084.41          0.00         20.93          20.93          0.00          0.00      21,063.49
     P2-M          350,133.00     313,346.92          0.00      1,350.70       1,350.70          0.00          0.00     311,996.22
     X1-M *    142,084,361.67  93,728,339.00     40,652.24          0.00      40,652.24          0.00          0.00  93,622,418.32
     X2-M *    187,559,494.52 121,558,387.53     22,393.28          0.00      22,393.28          0.00          0.00 119,871,460.89
     Y1             71,698.81      47,382.63        266.52          0.00         266.52          0.00          0.00      47,382.63
     Y2             99,676.65      62,234.80        337.11        189.27         526.38          0.00          0.00      62,045.53
     Z1        143,556,266.44  95,191,104.59    535,449.96    107,496.81     642,946.77          0.00          0.00  95,083,607.78
     Z2        199,253,620.42 132,121,003.03    715,655.43  1,733,017.14   2,448,672.57          0.00          0.00 130,387,985.89
     R-I                50.00           0.00          0.00          0.00           0.00          0.00          0.00           0.00

------------------------------------------------------------------------------------------------------------------------------------
TOTALS         343,352,946.32 227,756,156.38  1,314,754.54  1,842,074.84   3,156,829.39          0.00          0.00 225,914,081.54
------------------------------------------------------------------------------------------------------------------------------------
  *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                         980.624622      0.000000      0.973211       0.973211    979.651644     0.000000%      0.000000%
     P2-M                         894.936838      0.000000      3.857677       3.857677    891.079161     0.000000%      0.000000%
     X1-M *                       659.666820      0.286113      0.000000       0.286113    658.921342     0.520469%      0.520469%
     X2-M *                       648.105754      0.119393      0.000000       0.119393    639.111665     0.221062%      0.221062%
     Y1                           660.856552      3.717258      0.000000       3.717258    660.856552     6.750000%      6.750000%
     Y2                           624.366900      3.382036      1.898880       5.280916    622.468060     6.500000%      6.500000%
     Z1                           663.092646      3.729896      0.748813       4.478709    662.343833     6.750000%      6.750000%
     Z2                           663.079560      3.591681      8.697544      12.289225    654.382016     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:               Kelly L. Shea
SERVICER:                                  Bank of America                                                   Deutsche Bank
LEAD UNDERWRITER:                    Donaldson, Lufkin & Jenrette                                       1761 E. St. Andrew Place
RECORD DATE:                               January 31, 2000                                               Santa Ana, CA 92705
DISTRIBUTION DATE:                        February 25, 2000                          FACTOR INFORMATION:     (800) 735-7777
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
                                    Page 1 of 5 (C) COPYRIGHT 2000 Deutsche Bank


<PAGE>


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

<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  47,781,674.28    268,771.92    103,789.44     372,561.36          0.00          0.00  47,677,884.84
     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   7,227,064.30     40,652.22          0.00      40,652.22          0.00          0.00   7,218,666.34
     I-PO           21,501.00      21,084.41          0.00         20.92          20.92          0.00          0.00      21,063.49
     IIA-1     121,111,453.00  79,394,677.07    430,054.50  1,070,071.96   1,500,126.46          0.00          0.00  78,324,605.11
     IIA-2       1,000,000.00     516,140.20      2,795.76     11,850.85      14,646.61          0.00          0.00     504,289.35
     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  13,842,037.06     74,977.70     55,280.63     130,258.33          0.00          0.00  13,786,756.43
     IIA-5      46,447,250.00  25,071,123.05    135,801.92    575,646.16     711,448.08          0.00          0.00  24,495,476.89
     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   4,134,143.14     22,393.28          0.00      22,393.28          0.00          0.00   4,054,210.78
     II-PO         350,133.00     313,346.92          0.00      1,350.70       1,350.70          0.00          0.00     311,996.22


------------------------------------------------------------------------------------------------------------------------------------
TOTALS         333,910,590.00 218,778,082.99  1,265,314.81  1,818,010.66   3,083,325.47          0.00          0.00 216,960,072.33
------------------------------------------------------------------------------------------------------------------------------------
  *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         497.200068      2.796750      1.079998       3.876748    496.120069     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         603.074081      5.624998      0.000000       5.624998    602.373300     6.750000%      0.000000%
     I-PO       055240DH5         980.624622      0.000000      0.972978       0.972978    979.651644     0.000000%      6.500000%
     IIA-1      055240CZ6         655.550529      3.550899      8.835432      12.386330    646.715097     6.500000%      6.500000%
     IIA-2      055240DA0         516.140200      2.795760     11.850850      14.646610    504.289350     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         928.139334      5.027421      3.706689       8.734111    924.432645     6.500000%      6.500000%
     IIA-5      055240DD4         539.776263      2.923788     12.393547      15.317335    527.382717     6.500000%      6.500000%
     IIA-6      055240DE2           0.000000      0.000000      0.000000       0.000000      0.000000     6.500000%      6.500000%
     II-X *     055240DG7         550.228079      2.980403      0.000000       2.980403    539.589592     6.500000%      0.000000%
     II-PO      055240DU6         894.936838      0.000000      3.857677       3.857677    891.079161     0.000000%      0.000000%



------------------------------------------------------------------------------------------------------------------------------------
SELLER:                                    Bank of America                      ADMINISTRATOR:               Kelly L. Shea
SERVICER:                                  Bank of America                                                   Deutsche Bank
LEAD UNDERWRITER:                    Donaldson, Lufkin & Jenrette                                       1761 E. St. Andrew Place
RECORD DATE:                               January 31, 2000                                               Santa Ana, CA 92705
DISTRIBUTION DATE:                        February 25, 2000                     FACTOR INFORMATION:          (800) 735-7777
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
                                    Page 2 of 5 (C) COPYRIGHT 2000 Deutsche Bank


<PAGE>


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

<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   3,591,228.88     19,775.89      9,625.67      29,401.56          0.00          0.00   3,581,603.21
     B-1         2,231,794.00   2,122,089.86     11,685.75      5,687.90      17,373.65          0.00          0.00   2,116,401.96
     B-2         1,201,735.00   1,142,663.57      6,292.33      3,062.71       9,355.04          0.00          0.00   1,139,600.86
     B-3         1,030,060.00     979,427.25      5,393.43      2,625.19       8,018.62          0.00          0.00     976,802.06
     B-4           515,029.00     489,712.67      2,696.71      1,312.59       4,009.30          0.00          0.00     488,400.08
     B-5           686,706.32     652,951.16      3,595.62      1,750.12       5,345.74          0.00          0.00     651,201.04
     R-II               50.00           0.00          0.00          0.00           0.00          0.00          0.00           0.00


------------------------------------------------------------------------------------------------------------------------------------
TOTALS           9,442,256.32   8,978,073.39     49,439.73     24,064.18      73,503.91          0.00          0.00   8,954,009.21
------------------------------------------------------------------------------------------------------------------------------------
</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         950.844872      5.236036      2.548576       7.784612    948.296296     6.608064%      6.608251%
     B-1        055240DK8         950.844863      5.236034      2.548578       7.784612    948.296285     6.608064%      6.608251%
     B-2        055240DL6         950.844878      5.236038      2.548574       7.784611    948.296305     6.608064%      6.608251%
     B-3        055240DM4         950.844854      5.236035      2.548580       7.784614    948.296274     6.608064%      6.608251%
     B-4        055240DN2         950.844846      5.236035      2.548575       7.784610    948.296271     6.608064%      6.608251%
     B-5        055240DP7         950.844836      5.236037      2.548571       7.784609    948.296264     6.608064%      6.608251%
     R-II       055240DR3           0.000000      0.000000      0.000000       0.000000      0.000000     6.750000%      6.750000%


------------------------------------------------------------------------------------------------------------------------------------
SELLER:                                    Bank of America                      ADMINISTRATOR:               Kelly L. Shea
SERVICER:                                  Bank of America                                                   Deutsche Bank
LEAD UNDERWRITER:                    Donaldson, Lufkin & Jenrette                                       1761 E. St. Andrew Place
RECORD DATE:                               January 31, 2000                                               Santa Ana, CA 92705
DISTRIBUTION DATE:                        February 25, 2000                     FACTOR INFORMATION:          (800) 735-7777
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
                                    Page 3 of 5 (C) COPYRIGHT 2000 Deutsche Bank


<PAGE>


                          BA MORTGAGE SECURITIES, INC.
                       MORTGAGE PASS-THROUGH CERTIFICATES
                                  SERIES 1998-1
                         STATEMENT TO CERTIFICATEHOLDERS
<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
Distribution Date:            February 25, 2000
------------------------------------------------------------------------------------------------------------------------------------

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

<S>                                                                       <C>                         <C>
                BEGINNING BALANCE OF POOL                                 95,259,571.67               132,496,584.99
                LESS:         SCHEDULED PRINCIPAL                            (91,002.71)                (529,174.07)
                              PRINCIPAL PREPAYMENTS                          (16,515.01)              (1,205,383.05)
                              REPURCHASES                                          0.00                        0.00
                              LIQUIDATIONS                                         0.00                        0.00
                              OTHER UNSCHEDULED PRINCIPAL                          0.00                        0.00
                                                                          -------------               --------------
                ENDING BALANCE OF POOL                                    95,152,053.95               130,762,027.87
                                                                          =============               ==============

                BEGINNING NUMBER OF LOANS IN POOL                                   301                         413
                ENDING NUMBER OF LOANS IN POOL                                      301                         410

                WEIGHTED AVERAGE REMAINING TERM TO MATURITY                         327                         153
                WEIGHTED AVERAGE NET CONTRACT RATE                            7.510609%                   7.073634%

                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                   93,728,339.00               121,558,387.53
                STRIPPED INTEREST RATE                                        0.520469%                   0.221062%
</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               243,581.01          0.00           0.00          0.00          0.00           0.00
                     PERCENTAGE OF GROUP BAL.      0.1078%       0.0000%        0.0000%       0.0000%       0.0000%        0.0000%
                NUMBER OF LOANS                          1             0              0             0             0              0
                     PERCENTAGE OF LOANS           0.1406%       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          19,845.74                   42,641.20
                PLUS:         ADDITIONAL SERVICING COMPENSATION                    0.00                        0.00
                LESS:         AMTS. TO COVER PREPAYMENT INT. SHORTFALL             0.00                   (4,314.76)
                              DELINQUENT SERVICING FEES                       (1,208.51)                   1,873.64
                                                                          -------------               --------------
                SERVICING FEES COLLECTED FOR THE CURRENT DUE PERIOD           18,637.23                   40,200.08
                                                                          =============               ==============
                ADVANCED PRINCIPAL                                             5,217.89                   22,590.80
                ADVANCED INTEREST                                             34,982.38                   32,433.83

------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
                                    Page 4 of 5 (C) COPYRIGHT 2000 Deutsche Bank


<PAGE>


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

                         STATEMENT TO CERTIFICATEHOLDERS

<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
Distribution Date:            February 25, 2000
------------------------------------------------------------------------------------------------------------------------------------
                                                 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                  16,511.68          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                       3.33          0.00                         0.00          0.00                         0.00
       CLASS IIA-1                752,448.01          0.00                         0.00          0.00                         0.00
       CLASS IIA-2                  8,333.22          0.00                         0.00          0.00                         0.00
       CLASS IIA-3                      0.00          0.00                         0.00          0.00                         0.00
       CLASS IIA-4                 38,871.97          0.00                         0.00          0.00                         0.00
       CLASS IIA-5                404,780.07          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                    949.78          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                      1,221,898.06          0.00                         0.00          0.00                         0.00
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>


<TABLE>
<CAPTION>

<S>                                                                                                          <C>
                OTHER REPORTING ITEMS:

                GROUP I PERCENTAGE                                                                           95.93%
                GROUP I PREPAYMENT PERCENTAGE                                                               100.00%
                GROUP II PERCENTAGE                                                                          96.14%
                GROUP II PREPAYMENT PERCENTAGE                                                              100.00%

                SUBORDINATE PRINCIPAL DISTRIBUTION AMOUNT                                                 24,064.18
                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 2000 Deutsche Bank


<PAGE>

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


<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      21,063.49          0.00         21.05          21.05          0.00          0.00      21,042.45
     P2-M          350,133.00     311,996.22          0.00      1,531.22       1,531.22          0.00          0.00     310,465.00
     X1-M *    142,084,361.67  93,622,418.32     40,605.00          0.00      40,605.00          0.00          0.00  93,418,568.86
     X2-M *    187,559,494.52 119,871,460.89     21,960.31          0.00      21,960.31          0.00          0.00 118,107,583.35
     Y1             71,698.81      47,382.63        266.54         22.57         289.10          0.00          0.00      47,360.06
     Y2             99,676.65      62,045.53        336.08        220.33         556.41          0.00          0.00      61,825.20
     Z1        143,556,266.44  95,083,607.78    534,845.29    205,412.08     740,257.37          0.00          0.00  94,878,195.70
     Z2        199,253,620.42 130,387,985.89    706,268.26  1,819,018.85   2,525,287.11          0.00          0.00 128,568,967.04
     R-I                50.00           0.00          0.00          0.00           0.00          0.00          0.00           0.00

------------------------------------------------------------------------------------------------------------------------------------
TOTALS         343,352,946.32 225,914,081.54  1,304,281.48  2,026,226.09   3,330,507.57          0.00          0.00 223,887,855.45
------------------------------------------------------------------------------------------------------------------------------------
  *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                         979.651644      0.000000      0.978792       0.978792    978.673085     0.000000%      0.000000%
     P2-M                         891.079161      0.000000      4.373252       4.373252    886.705909     0.000000%      0.000000%
     X1-M *                       658.921342      0.285781      0.000000       0.285781    657.486635     0.520452%      0.520452%
     X2-M *                       639.111665      0.117085      0.000000       0.117085    629.707302     0.219839%      0.219839%
     Y1                           660.856552      3.717426      0.314781       4.032206    660.541763     6.750000%      6.750000%
     Y2                           622.468060      3.371702      2.210424       5.582127    620.257612     6.500000%      6.500000%
     Z1                           662.343833      3.725684      1.430882       5.156566    660.912951     6.750000%      6.750000%
     Z2                           654.382016      3.544569      9.129163      12.673733    645.252853     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:              Barbara Campbell
SERVICER:                                  Bank of America                                                   Deutsche Bank
LEAD UNDERWRITER:                    Donaldson, Lufkin & Jenrette                                       1761 E. St. Andrew Place
RECORD DATE:                              February 29, 2000                                               Santa Ana, CA 92705
DISTRIBUTION DATE:                          March 27, 2000                      FACTOR INFORMATION:          (800) 735-7777
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>

                                    Page 1 of 5 (C) COPYRIGHT 2000 Deutsche Bank


<PAGE>


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


<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  47,677,884.84    268,188.10    201,699.16     469,887.26          0.00          0.00  47,476,185.68
     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   7,218,666.34     40,605.00          0.00      40,605.00          0.00          0.00   7,201,340.48
     I-PO           21,501.00      21,063.49          0.00         21.04          21.04          0.00          0.00      21,042.45
     IIA-1     121,111,453.00  78,324,605.11    424,258.28  1,123,733.86   1,547,992.14          0.00          0.00  77,200,871.25
     IIA-2       1,000,000.00     504,289.35      2,731.57     12,493.57      15,225.14          0.00          0.00     491,795.78
     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  13,786,756.43     74,678.26     55,652.36     130,330.62          0.00          0.00  13,731,104.07
     IIA-5      46,447,250.00  24,495,476.89    132,683.83    606,865.69     739,549.52          0.00          0.00  23,888,611.20
     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   4,054,210.78     21,960.31          0.00      21,960.31          0.00          0.00   3,962,905.61
     II-PO         350,133.00     311,996.22          0.00      1,531.22       1,531.22          0.00          0.00     310,465.00

------------------------------------------------------------------------------------------------------------------------------------
TOTALS         333,910,590.00 216,960,072.33  1,254,972.86  2,001,996.90   3,256,969.76          0.00          0.00 214,958,075.43
------------------------------------------------------------------------------------------------------------------------------------
</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>
     IA-1       055240CT0         496.120069      2.790675      2.098814       4.889489    494.021256     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         602.373300      5.625000      0.000000       5.625000    600.927516     6.750000%      0.000000%
     I-PO       055240DH5         979.651644      0.000000      0.978559       0.978559    978.673085     0.000000%      6.500000%
     IIA-1      055240CZ6         646.715097      3.503040      9.278510      12.781550    637.436587     6.500000%      6.500000%
     IIA-2      055240DA0         504.289350      2.731570     12.493570      15.225140    491.795780     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         924.432645      5.007343      3.731614       8.738957    920.701030     6.500000%      6.500000%
     IIA-5      055240DD4         527.382717      2.856656     13.065697      15.922353    514.317020     6.500000%      6.500000%
     IIA-6      055240DE2           0.000000      0.000000      0.000000       0.000000      0.000000     6.500000%      6.500000%
     II-X *     055240DG7         539.589592      2.922777      0.000000       2.922777    527.437456     6.500000%      0.000000%
     II-PO      055240DU6         891.079161      0.000000      4.373252       4.373252    886.705909     0.000000%      0.000000%

------------------------------------------------------------------------------------------------------------------------------------
SELLER:                                    Bank of America                      ADMINISTRATOR:              Barbara Campbell
SERVICER:                                  Bank of America                                                   Deutsche Bank
LEAD UNDERWRITER:                    Donaldson, Lufkin & Jenrette                                       1761 E. St. Andrew Place
RECORD DATE:                              February 29, 2000                                               Santa Ana, CA 92705
DISTRIBUTION DATE:                          March 27, 2000                      FACTOR INFORMATION:          (800) 735-7777
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
                                    Page 2 of 5 (C) COPYRIGHT 2000 Deutsche Bank


<PAGE>


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

                         STATEMENT TO CERTIFICATEHOLDERS

<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   3,581,603.21     19,723.44      9,691.67      29,415.11          0.00          0.00   3,571,911.54
     B-1         2,231,794.00   2,116,401.96     11,654.76      5,726.90      17,381.66          0.00          0.00   2,110,675.06
     B-2         1,201,735.00   1,139,600.86      6,275.64      3,083.71       9,359.35          0.00          0.00   1,136,517.15
     B-3         1,030,060.00     976,802.06      5,379.13      2,643.19       8,022.32          0.00          0.00     974,158.87
     B-4           515,029.00     488,400.08      2,689.56      1,321.59       4,011.15          0.00          0.00     487,078.49
     B-5           686,706.32     651,201.04      3,586.08      1,762.13       5,348.21          0.00          0.00     649,438.91
     R-II               50.00           0.00          0.00          0.00           0.00          0.00          0.00           0.00

------------------------------------------------------------------------------------------------------------------------------------
TOTALS           9,442,256.32   8,954,009.21     49,308.61     24,229.19      73,537.80          0.00          0.00   8,929,780.02
------------------------------------------------------------------------------------------------------------------------------------
</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         948.296296      5.222149      2.566051       7.788199    945.730245     6.608251%      6.608440%
     B-1        055240DK8         948.296285      5.222149      2.566052       7.788201    945.730233     6.608251%      6.608440%
     B-2        055240DL6         948.296305      5.222150      2.566048       7.788198    945.730257     6.608251%      6.608440%
     B-3        055240DM4         948.296274      5.222152      2.566054       7.788207    945.730220     6.608251%      6.608440%
     B-4        055240DN2         948.296271      5.222153      2.566050       7.788202    945.730221     6.608251%      6.608440%
     B-5        055240DP7         948.296264      5.222145      2.566061       7.788206    945.730204     6.608251%      6.608440%
     R-II       055240DR3           0.000000      0.000000      0.000000       0.000000      0.000000     6.750000%      6.750000%


------------------------------------------------------------------------------------------------------------------------------------
SELLER:                                    Bank of America                      ADMINISTRATOR:              Barbara Campbell
SERVICER:                                  Bank of America                                                   Deutsche Bank
LEAD UNDERWRITER:                    Donaldson, Lufkin & Jenrette                                       1761 E. St. Andrew Place
RECORD DATE:                              February 29, 2000                                               Santa Ana, CA 92705
DISTRIBUTION DATE:                          March 27, 2000                      FACTOR INFORMATION:          (800) 735-7777
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
                                    Page 3 of 5 (C) COPYRIGHT 2000 Deutsche Bank


<PAGE>


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

                         STATEMENT TO CERTIFICATEHOLDERS

<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
Distribution Date:            March 27, 2000
------------------------------------------------------------------------------------------------------------------------------------


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

<S>                                                                       <C>                         <C>
                BEGINNING BALANCE OF POOL                                 95,152,053.95               130,762,027.87
                LESS:         SCHEDULED PRINCIPAL                            (91,677.04)                (527,865.75)
                              PRINCIPAL PREPAYMENTS                         (113,778.65)              (1,292,904.65)
                              REPURCHASES                                          0.00                        0.00
                              LIQUIDATIONS                                         0.00                        0.00
                              OTHER UNSCHEDULED PRINCIPAL                          0.00                        0.00
                                                                          -------------               --------------
                ENDING BALANCE OF POOL                                    94,946,598.26               128,941,257.47
                                                                          =============               ==============

                BEGINNING NUMBER OF LOANS IN POOL                                   301                         410
                ENDING NUMBER OF LOANS IN POOL                                      301                         405

                WEIGHTED AVERAGE REMAINING TERM TO MATURITY                         326                         152
                WEIGHTED AVERAGE NET CONTRACT RATE                            7.510591%                   7.072004%

                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                   93,622,418.32               119,871,460.89
                STRIPPED INTEREST RATE                                        0.520452%                   0.219839%
</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               243,581.01          0.00           0.00          0.00          0.00           0.00
                     PERCENTAGE OF GROUP BAL.      0.1088%       0.0000%        0.0000%       0.0000%       0.0000%        0.0000%
                NUMBER OF LOANS                          1             0              0             0             0              0
                     PERCENTAGE OF LOANS           0.1416%       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          19,823.34                   42,060.01
                PLUS:         ADDITIONAL SERVICING COMPENSATION                    0.00                        0.00
                LESS:         AMTS. TO COVER PREPAYMENT INT. SHORTFALL             0.00                   (4,267.42)
                              DELINQUENT SERVICING FEES                            0.00                        0.00
                                                                          -------------               --------------
                SERVICING FEES COLLECTED FOR THE CURRENT DUE PERIOD           19,823.34                   37,792.59
                                                                          =============               ==============

                ADVANCED PRINCIPAL                                                 0.00                        0.00
                ADVANCED INTEREST                                                  0.00                        0.00

------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
                                    Page 4 of 5 (C) COPYRIGHT 2000 Deutsche Bank


<PAGE>


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

                         STATEMENT TO CERTIFICATEHOLDERS

<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
Distribution Date:            March 27, 2000
------------------------------------------------------------------------------------------------------------------------------------
                                                 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                 113,766.78          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                      11.87          0.00                         0.00          0.00                         0.00
       CLASS IIA-1                807,031.91          0.00                         0.00          0.00                         0.00
       CLASS IIA-2                  8,972.51          0.00                         0.00          0.00                         0.00
       CLASS IIA-3                      0.00          0.00                         0.00          0.00                         0.00
       CLASS IIA-4                 39,967.85          0.00                         0.00          0.00                         0.00
       CLASS IIA-5                435,832.71          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                  1,099.68          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                      1,406,683.30          0.00                         0.00          0.00                         0.00
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>

<TABLE>
<CAPTION>

<S>                                                                                                          <C>
                OTHER REPORTING ITEMS:

                GROUP I PERCENTAGE                                                                           95.92%
                GROUP I PREPAYMENT PERCENTAGE                                                               100.00%
                GROUP II PERCENTAGE                                                                          96.11%
                GROUP II PREPAYMENT PERCENTAGE                                                              100.00%

                SUBORDINATE PRINCIPAL DISTRIBUTION AMOUNT                                                 24,229.19
                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 2000 Deutsche Bank


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

<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      21,042.45          0.00         21.16          21.16          0.00          0.00      21,021.29
     P2-M          350,133.00     310,465.00          0.00      1,324.69       1,324.69          0.00          0.00     309,140.31
     X1-M *    142,084,361.67  93,418,568.86     40,507.54          0.00      40,507.54          0.00          0.00  93,418,568.86
     X2-M *    187,559,494.52 118,107,583.35     21,465.74          0.00      21,465.74          0.00          0.00 118,107,583.35
     Y1             71,698.81      47,360.06        266.39        270.47         536.86          0.00          0.00      47,089.59
     Y2             99,676.65      61,825.20        334.89        544.37         879.26          0.00          0.00      61,280.83
     Z1        143,556,266.44  94,878,195.70    533,689.85    372,919.75     906,609.60          0.00          0.00  94,505,275.95
     Z2        199,253,620.42 128,568,967.04    696,415.24  1,618,132.56   2,314,547.80          0.00          0.00 126,950,834.48
     R-I                50.00           0.00          0.00          0.00           0.00          0.00          0.00           0.00


TOTALS         343,352,946.32 223,887,855.45  1,292,679.65  1,993,213.00   3,285,892.65          0.00          0.00 221,894,642.45
------------------------------------------------------------------------------------------------------------------------------------
*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>            <C>
     P1-M                         978.673085      0.000000      0.984140       0.984140    977.688945     0.000000%      0.000000%
     P2-M                         886.705909      0.000000      3.783391       3.783391    882.922518     0.000000%      0.000000%
     X1-M *                       657.486635      0.285095      0.000000       0.285095    657.486635     0.520336%      0.520336%
     X2-M *                       629.707302      0.114448      0.000000       0.114448    629.707302     0.218097%      0.218097%
     Y1                           660.541763      3.715403      3.772340       7.487743    656.769455     6.750000%      6.750000%
     Y2                           620.257612      3.359764      5.461393       8.821157    614.796253     6.500000%      6.500000%
     Z1                           660.912951      3.717635      2.597725       6.315361    658.315226     6.750000%      6.750000%
     Z2                           645.252853      3.495120      8.120969      11.616089    637.131884     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:              Barbara Campbell
SERVICER:                                  Bank of America                                                   Deutsche Bank
LEAD UNDERWRITER:                    Donaldson, Lufkin & Jenrette                                       1761 E. St. Andrew Place
RECORD DATE:                                March 31, 2000                                                Santa Ana, CA 92705
DISTRIBUTION DATE:                          April 25, 2000                      FACTOR INFORMATION:          (800) 735-7777
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>

                                    Page 1 of 5 (C) COPYRIGHT 2000 Deutsche Bank


<PAGE>


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

<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  47,476,185.68    267,053.54    369,407.75     636,461.29          0.00          0.00  47,106,777.93
     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   7,201,340.48     40,507.54          0.00      40,507.54          0.00          0.00   7,201,340.48
     I-PO           21,501.00      21,042.45          0.00         21.16          21.16          0.00          0.00      21,021.29
     IIA-1     121,111,453.00  77,200,871.25    418,171.39    998,334.07   1,416,505.46          0.00          0.00  76,202,537.18
     IIA-2       1,000,000.00     491,795.78      2,663.89     10,965.15      13,629.04          0.00          0.00     480,830.63
     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  13,731,104.07     74,376.81     56,096.37     130,473.18          0.00          0.00  13,675,007.70
     IIA-5      46,447,250.00  23,888,611.20    129,396.64    532,624.15     662,020.79          0.00          0.00  23,355,987.05
     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   3,962,905.61     21,465.74          0.00      21,465.74          0.00          0.00   3,962,905.61
     II-PO         350,133.00     310,465.00          0.00      1,324.69       1,324.69          0.00          0.00     309,140.31

------------------------------------------------------------------------------------------------------------------------------------
TOTALS         333,910,590.00 214,958,075.43  1,243,503.06  1,968,773.33   3,212,276.39          0.00          0.00 212,989,302.09
------------------------------------------------------------------------------------------------------------------------------------
  *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         494.021256      2.778870      3.843933       6.622803    490.177323     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         600.927516      5.625000      0.000000       5.625000    600.927516     6.750000%      0.000000%
     I-PO       055240DH5         978.673085      0.000000      0.984140       0.984140    977.688945     0.000000%      6.500000%
     IIA-1      055240CZ6         637.436587      3.452782      8.243102      11.695884    629.193485     6.500000%      6.500000%
     IIA-2      055240DA0         491.795780      2.663890     10.965150      13.629040    480.830630     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         920.701030      4.987130      3.761386       8.748516    916.939644     6.500000%      6.500000%
     IIA-5      055240DD4         514.317020      2.785884     11.467291      14.253175    502.849728     6.500000%      6.500000%
     IIA-6      055240DE2           0.000000      0.000000      0.000000       0.000000      0.000000     6.500000%      6.500000%
     II-X *     055240DG7         527.437456      2.856953      0.000000       2.856953    527.437456     6.500000%      0.000000%
     II-PO      055240DU6         886.705909      0.000000      3.783391       3.783391    882.922518     0.000000%      0.000000%



------------------------------------------------------------------------------------------------------------------------------------
SELLER:                                    Bank of America                      ADMINISTRATOR:              Barbara Campbell
SERVICER:                                  Bank of America                                                   Deutsche Bank
LEAD UNDERWRITER:                    Donaldson, Lufkin & Jenrette                                       1761 E. St. Andrew Place
RECORD DATE:                                March 31, 2000                                                Santa Ana, CA 92705
DISTRIBUTION DATE:                          April 25, 2000                           FACTOR INFORMATION:     (800) 735-7777
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
                                    Page 2 of 5 (C) COPYRIGHT 2000 Deutsche Bank


<PAGE>


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

                         STATEMENT TO CERTIFICATEHOLDERS


<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   3,571,911.54     19,670.63      9,775.87      29,446.50          0.00          0.00   3,562,135.67
     B-1         2,231,794.00   2,110,675.06     11,623.56      5,776.65      17,400.21          0.00          0.00   2,104,898.41
     B-2         1,201,735.00   1,136,517.15      6,258.84      3,110.50       9,369.34          0.00          0.00   1,133,406.65
     B-3         1,030,060.00     974,158.87      5,364.73      2,666.15       8,030.88          0.00          0.00     971,492.72
     B-4           515,029.00     487,078.49      2,682.36      1,333.07       4,015.43          0.00          0.00     485,745.42
     B-5           686,706.32     649,438.91      3,576.48      1,777.42       5,353.90          0.00          0.00     647,661.49
     R-II               50.00           0.00          0.00          0.00           0.00          0.00          0.00           0.00

------------------------------------------------------------------------------------------------------------------------------------
TOTALS           9,442,256.32   8,929,780.02     49,176.60     24,439.66      73,616.26          0.00          0.00   8,905,340.36
------------------------------------------------------------------------------------------------------------------------------------
</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         945.730245      5.208166      2.588344       7.796510    943.141901     6.608440%      6.608631%
     B-1        055240DK8         945.730233      5.208169      2.588344       7.796513    943.141889     6.608440%      6.608631%
     B-2        055240DL6         945.730257      5.208170      2.588341       7.796511    943.141916     6.608440%      6.608631%
     B-3        055240DM4         945.730220      5.208172      2.588344       7.796517    943.141875     6.608440%      6.608631%
     B-4        055240DN2         945.730221      5.208173      2.588340       7.796512    943.141881     6.608440%      6.608631%
     B-5        055240DP7         945.730204      5.208165      2.588326       7.796492    943.141881     6.608440%      6.608631%
     R-II       055240DR3           0.000000      0.000000      0.000000       0.000000      0.000000     6.750000%      6.750000%

------------------------------------------------------------------------------------------------------------------------------------
SELLER:                                    Bank of America                      ADMINISTRATOR:              Barbara Campbell
SERVICER:                                  Bank of America                                                   Deutsche Bank
LEAD UNDERWRITER:                    Donaldson, Lufkin & Jenrette                                       1761 E. St. Andrew Place
RECORD DATE:                                March 31, 2000                                                Santa Ana, CA 92705
DISTRIBUTION DATE:                          April 25, 2000                      FACTOR INFORMATION:          (800) 735-7777
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
                                    Page 3 of 5 (C) COPYRIGHT 2000 Deutsche Bank


<PAGE>


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

                         STATEMENT TO CERTIFICATEHOLDERS

<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
Distribution Date:            April 25, 2000
------------------------------------------------------------------------------------------------------------------------------------


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

<S>                                                                       <C>                         <C>
                BEGINNING BALANCE OF POOL                                 94,946,598.26               128,941,257.47
                LESS:         SCHEDULED PRINCIPAL                            (92,718.68)                (526,794.32)
                              PRINCIPAL PREPAYMENTS                         (280,492.69)              (1,093,207.31)
                              REPURCHASES                                          0.00                        0.00
                              LIQUIDATIONS                                         0.00                        0.00
                              OTHER UNSCHEDULED PRINCIPAL                          0.00                        0.00
                                                                          -------------               --------------
                ENDING BALANCE OF POOL                                    94,573,386.89               127,321,255.84
                                                                          =============               ==============

                BEGINNING NUMBER OF LOANS IN POOL                                   301                         405
                ENDING NUMBER OF LOANS IN POOL                                      300                         401

                WEIGHTED AVERAGE REMAINING TERM TO MATURITY                         325                         151
                WEIGHTED AVERAGE NET CONTRACT RATE                            7.510466%                   7.069408%

                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                   93,418,568.86               118,107,583.35
                STRIPPED INTEREST RATE                                        0.520336%                   0.218097%
</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          19,780.54                   41,399.42
                PLUS:         ADDITIONAL SERVICING COMPENSATION                    0.00                        0.00
                LESS:         AMTS. TO COVER PREPAYMENT INT. SHORTFALL          (985.02)                    (811.03)
                              DELINQUENT SERVICING FEES                       (1,691.20)                   3,870.84
                                                                          -------------               --------------
                SERVICING FEES COLLECTED FOR THE CURRENT DUE PERIOD           17,104.32                   44,459.23
                                                                          =============               ==============

                ADVANCED PRINCIPAL                                             7,382.46                   44,374.89
                ADVANCED INTEREST                                             48,772.19                   62,871.58
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
                                    Page 4 of 5 (C) COPYRIGHT 2000 Deutsche Bank


<PAGE>


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

<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
Distribution Date:            April 25, 2000
------------------------------------------------------------------------------------------------------------------------------------
                                                 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                 280,476.62          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                      16.07          0.00                         0.00          0.00                         0.00
       CLASS IIA-1                682,395.91          0.00                         0.00          0.00                         0.00
       CLASS IIA-2                  7,495.06          0.00                         0.00          0.00                         0.00
       CLASS IIA-3                      0.00          0.00                         0.00          0.00                         0.00
       CLASS IIA-4                 38,343.81          0.00                         0.00          0.00                         0.00
       CLASS IIA-5                364,067.05          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                    905.47          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                      1,373,700.00          0.00                         0.00          0.00                         0.00
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>


<TABLE>
<CAPTION>

<S>                                                                                                          <C>
                OTHER REPORTING ITEMS:

                GROUP I PERCENTAGE                                                                           95.92%
                GROUP I PREPAYMENT PERCENTAGE                                                               100.00%
                GROUP II PERCENTAGE                                                                          96.07%
                GROUP II PREPAYMENT PERCENTAGE                                                              100.00%

                SUBORDINATE PRINCIPAL DISTRIBUTION AMOUNT                                                 24,439.67
                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 2000 Deutsche Bank


<PAGE>

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


<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      21,021.29          0.00         21.26          21.26          0.00          0.00      21,000.03
     P2-M          350,133.00     309,140.31          0.00      1,403.25       1,403.25          0.00          0.00     307,737.06
     X1-M *    142,084,361.67  93,046,972.98     40,377.62          0.00      40,377.62          0.00          0.00  92,936,497.44
     X2-M *    187,559,494.52 116,533,998.88     21,265.83          0.00      21,265.83          0.00          0.00 115,670,652.24
     Y1             71,698.81      47,089.59        264.90          0.00         264.90          0.00          0.00      47,089.59
     Y2             99,676.65      61,280.83        331.94        194.36         526.30          0.00          0.00      61,086.47
     Z1        143,556,266.44  94,505,275.95    531,592.18    112,063.61     643,655.79          0.00          0.00  94,393,212.34
     Z2        199,253,620.42 126,950,834.48    687,650.32    910,197.68   1,597,848.00          0.00          0.00 126,040,636.80
     R-I                50.00           0.00          0.00          0.00           0.00          0.00          0.00           0.00


------------------------------------------------------------------------------------------------------------------------------------
TOTALS         343,352,946.32 221,894,642.45  1,281,482.79  1,023,880.16   2,305,362.95          0.00          0.00 220,870,762.29
------------------------------------------------------------------------------------------------------------------------------------
*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                         977.688945      0.000000      0.988791       0.988791    976.700153     0.000000%      0.000000%
     P2-M                         882.922518      0.000000      4.007763       4.007763    878.914755     0.000000%      0.000000%
     X1-M *                       654.871316      0.284181      0.000000       0.284181    654.093782     0.520738%      0.520738%
     X2-M *                       621.317514      0.113382      0.000000       0.113382    616.714459     0.218983%      0.218983%
     Y1                           656.769455      3.694622      0.000000       3.694622    656.769455     6.750000%      6.750000%
     Y2                           614.796253      3.330168      1.949873       5.280041    612.846348     6.500000%      6.500000%
     Z1                           658.315226      3.703023      0.780625       4.483648    657.534601     6.750000%      6.750000%
     Z2                           637.131884      3.451131      4.568036       8.019167    632.563848     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:              Barbara Campbell
SERVICER:                                  Bank of America                                                   Deutsche Bank
LEAD UNDERWRITER:                    Donaldson, Lufkin & Jenrette                                       1761 E. St. Andrew Place
RECORD DATE:                                April 28, 2000                                                Santa Ana, CA 92705
DISTRIBUTION DATE:                           May 25, 2000                       FACTOR INFORMATION:          (800) 735-7777
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
                                    Page 1 of 5 (C) COPYRIGHT 2000 Deutsche Bank


<PAGE>


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

                         STATEMENT TO CERTIFICATEHOLDERS

<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  47,106,777.93    264,975.63    108,242.74     373,218.37          0.00          0.00  46,998,535.19
     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   7,178,243.06     40,377.59          0.00      40,377.59          0.00          0.00   7,169,792.87
     I-PO           21,501.00      21,021.29          0.00         21.26          21.26          0.00          0.00      21,000.03
     IIA-1     121,111,453.00  76,202,537.18    412,763.74    555,676.72     968,440.46          0.00          0.00  75,646,860.46
     IIA-2       1,000,000.00     480,830.63      2,604.50      5,586.69       8,191.19          0.00          0.00     475,243.94
     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  13,675,007.70     74,072.96     56,831.34     130,904.30          0.00          0.00  13,618,176.36
     IIA-5      46,447,250.00  23,355,987.05    126,511.60    271,369.40     397,881.00          0.00          0.00  23,084,617.65
     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   3,925,999.54     21,265.83          0.00      21,265.83          0.00          0.00   3,899,570.17
     II-PO         350,133.00     309,140.31          0.00      1,403.25       1,403.25          0.00          0.00     307,737.06


------------------------------------------------------------------------------------------------------------------------------------
TOTALS         333,910,590.00 212,989,302.09  1,232,439.36    999,131.40   2,231,570.76          0.00          0.00 211,990,170.69
------------------------------------------------------------------------------------------------------------------------------------
*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         490.177323      2.757247      1.126338       3.883585    489.050985     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         599.000114      5.624996      0.000000       5.624996    598.294974     6.750000%      0.000000%
     I-PO       055240DH5         977.688945      0.000000      0.988791       0.988791    976.700153     0.000000%      6.500000%
     IIA-1      055240CZ6         629.193485      3.408131      4.588143       7.996275    624.605341     6.500000%      6.500000%
     IIA-2      055240DA0         480.830630      2.604500      5.586690       8.191190    475.243940     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         916.939644      4.966757      3.810668       8.777424    913.128976     6.500000%      6.500000%
     IIA-5      055240DD4         502.849728      2.723769      5.842529       8.566298    497.007200     6.500000%      6.500000%
     IIA-6      055240DE2           0.000000      0.000000      0.000000       0.000000      0.000000     6.500000%      6.500000%
     II-X *     055240DG7         522.525494      2.830346      0.000000       2.830346    519.007913     6.500000%      0.000000%
     II-PO      055240DU6         882.922518      0.000000      4.007763       4.007763    878.914755     0.000000%      0.000000%



------------------------------------------------------------------------------------------------------------------------------------
SELLER:                                    Bank of America                      ADMINISTRATOR:              Barbara Campbell
SERVICER:                                  Bank of America                                                   Deutsche Bank
LEAD UNDERWRITER:                    Donaldson, Lufkin & Jenrette                                       1761 E. St. Andrew Place
RECORD DATE:                                April 28, 2000                                                Santa Ana, CA 92705
DISTRIBUTION DATE:                           May 25, 2000                       FACTOR INFORMATION:          (800) 735-7777
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
                                    Page 2 of 5 (C) COPYRIGHT 2000 Deutsche Bank


<PAGE>



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

                         STATEMENT TO CERTIFICATEHOLDERS


<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   3,562,135.67     19,617.37      9,899.50      29,516.87          0.00          0.00   3,552,236.17
     B-1         2,231,794.00   2,104,898.41     11,592.08      5,849.71      17,441.79          0.00          0.00   2,099,048.70
     B-2         1,201,735.00   1,133,406.65      6,241.89      3,149.84       9,391.73          0.00          0.00   1,130,256.81
     B-3         1,030,060.00     971,492.72      5,350.20      2,699.87       8,050.07          0.00          0.00     968,792.85
     B-4           515,029.00     485,745.42      2,675.09      1,349.93       4,025.02          0.00          0.00     484,395.49
     B-5           686,706.32     647,661.49      3,566.80      1,799.91       5,366.71          0.00          0.00     645,861.58
     R-II               50.00           0.00          0.00          0.00           0.00          0.00          0.00           0.00

------------------------------------------------------------------------------------------------------------------------------------
TOTALS           9,442,256.32   8,905,340.36     49,043.43     24,748.76      73,792.19          0.00          0.00   8,880,591.60
------------------------------------------------------------------------------------------------------------------------------------
</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         943.141901      5.194065      2.621077       7.815142    940.520824     6.608631%      6.608826%
     B-1        055240DK8         943.141889      5.194064      2.621080       7.815143    940.520810     6.608631%      6.608826%
     B-2        055240DL6         943.141916      5.194065      2.621077       7.815142    940.520839     6.608631%      6.608826%
     B-3        055240DM4         943.141875      5.194066      2.621080       7.815147    940.520795     6.608631%      6.608826%
     B-4        055240DN2         943.141881      5.194057      2.621076       7.815133    940.520806     6.608631%      6.608826%
     B-5        055240DP7         943.141881      5.194069      2.621077       7.815146    940.520804     6.608631%      6.608826%
     R-II       055240DR3           0.000000      0.000000      0.000000       0.000000      0.000000     6.750000%      6.750000%

------------------------------------------------------------------------------------------------------------------------------------
SELLER:                                    Bank of America                      ADMINISTRATOR:              Barbara Campbell
SERVICER:                                  Bank of America                                                   Deutsche Bank
LEAD UNDERWRITER:                    Donaldson, Lufkin & Jenrette                                       1761 E. St. Andrew Place
RECORD DATE:                                April 28, 2000                                                Santa Ana, CA 92705
DISTRIBUTION DATE:                           May 25, 2000                       FACTOR INFORMATION:          (800) 735-7777
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
                                    Page 3 of 5 (C) COPYRIGHT 2000 Deutsche Bank


<PAGE>


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

                         STATEMENT TO CERTIFICATEHOLDERS

<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
Distribution Date:            May 25, 2000
------------------------------------------------------------------------------------------------------------------------------------


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

<S>                                                                       <C>                         <C>
                BEGINNING BALANCE OF POOL                                 94,573,386.89               127,321,255.84
                LESS:         SCHEDULED PRINCIPAL                            (93,383.83)                (529,143.63)
                              PRINCIPAL PREPAYMENTS                          (18,701.07)                (382,651.63)
                              REPURCHASES                                          0.00                        0.00
                              LIQUIDATIONS                                         0.00                        0.00
                              OTHER UNSCHEDULED PRINCIPAL                          0.00                        0.00
                                                                          -------------               --------------
                ENDING BALANCE OF POOL                                    94,461,301.99               126,409,460.58
                                                                          =============               ==============

                BEGINNING NUMBER OF LOANS IN POOL                                   300                         401
                ENDING NUMBER OF LOANS IN POOL                                      300                         400

                WEIGHTED AVERAGE REMAINING TERM TO MATURITY                         324                         150
                WEIGHTED AVERAGE NET CONTRACT RATE                            7.510833%                   7.070143%

                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                   93,046,972.98               116,533,998.88
                STRIPPED INTEREST RATE                                        0.520738%                   0.218983%
</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          19,702.79                   40,901.41
                PLUS:         ADDITIONAL SERVICING COMPENSATION                    0.00                        0.00
                LESS:         AMTS. TO COVER PREPAYMENT INT. SHORTFALL             0.00                     (879.23)
                              DELINQUENT SERVICING FEES                       (1,470.19)                   2,779.57
                                                                          -------------               --------------
                SERVICING FEES COLLECTED FOR THE CURRENT DUE PERIOD           18,232.60                   42,801.75
                                                                          =============               ==============

                ADVANCED PRINCIPAL                                             6,413.70                   34,926.66
                ADVANCED INTEREST                                             42,536.61                   48,311.18

------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
                                    Page 4 of 5 (C) COPYRIGHT 2000 Deutsche Bank


<PAGE>


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

                         STATEMENT TO CERTIFICATEHOLDERS

<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
Distribution Date:            May 25, 2000
------------------------------------------------------------------------------------------------------------------------------------

                                                 OTHER                                   CUMULATIVE
                                PREPAYMENT    UNSCHEDULED                 CERTIFICATE      UNPAID                     CUMULATIVE
                                PRINCIPAL      PRINCIPAL                    INTEREST      INTEREST                     REALIZED
     CLASS                     DISTRIBUTED    DISTRIBUTED                  SHORTFALL      SHORTFALL                     LOSSES
------------------------------------------------------------------------------------------------------------------------------------
<S>             <C>                <C>                <C>                          <C>           <C>                          <C>
       CLASS IA-1                  18,697.40          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                       3.67          0.00                         0.00          0.00                         0.00
       CLASS IIA-1                238,678.17          0.00                         0.00          0.00                         0.00
       CLASS IIA-2                  2,399.63          0.00                         0.00          0.00                         0.00
       CLASS IIA-3                      0.00          0.00                         0.00          0.00                         0.00
       CLASS IIA-4                 24,410.60          0.00                         0.00          0.00                         0.00
       CLASS IIA-5                116,560.49          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                    602.73          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                        401,352.70          0.00                         0.00          0.00                         0.00
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>

<TABLE>
<CAPTION>

<S>                                                                                                          <C>
                OTHER REPORTING ITEMS:

                GROUP I PERCENTAGE                                                                           95.91%
                GROUP I PREPAYMENT PERCENTAGE                                                               100.00%
                GROUP II PERCENTAGE                                                                          96.04%
                GROUP II PREPAYMENT PERCENTAGE                                                              100.00%

                SUBORDINATE PRINCIPAL DISTRIBUTION AMOUNT                                                 24,748.76
                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 2000 Deutsche Bank


<PAGE>

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

<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      21,000.03          0.00     12,598.61      12,598.61          0.00          0.00       8,401.42
     P2-M          350,133.00     307,737.06          0.00      6,469.27       6,469.27          0.00          0.00     301,267.79
     X1-M *    142,084,361.67  92,936,497.44     40,330.08          0.00      40,330.08          0.00          0.00  92,826,399.14
     X2-M *    187,559,494.52 115,670,652.24     21,122.67          0.00      21,122.67          0.00          0.00 114,323,205.16
     Y1             71,698.81      47,089.59        264.90        308.21         573.11          0.00          0.00      46,781.38
     Y2             99,676.65      61,086.47        330.89        593.57         924.46          0.00          0.00      60,492.90
     Z1        143,556,266.44  94,393,212.34    530,961.82    438,462.14     969,423.96          0.00          0.00  93,954,750.20
     Z2        199,253,620.42 126,040,636.80    682,720.09  1,653,683.97   2,336,404.06          0.00          0.00 124,386,952.83
     R-I                50.00           0.00          0.00          0.00           0.00          0.00          0.00           0.00

------------------------------------------------------------------------------------------------------------------------------------
TOTALS         343,352,946.32 220,870,762.29  1,275,730.45  2,112,115.77   3,387,846.22          0.00          0.00 218,758,646.52
------------------------------------------------------------------------------------------------------------------------------------
</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>            <C>
     P1-M                         976.700153      0.000000    585.954607     585.954607    390.745547     0.000000%      0.000000%
     P2-M                         878.914755      0.000000     18.476607      18.476607    860.438148     0.000000%      0.000000%
     X1-M *                       654.093782      0.283846      0.000000       0.283846    653.318902     0.520744%      0.520744%
     X2-M *                       616.714459      0.112619      0.000000       0.112619    609.530354     0.219133%      0.219133%
     Y1                           656.769455      3.694622      4.298668       7.993290    652.470778     6.750000%      6.750000%
     Y2                           612.846348      3.319634      5.954980       9.274614    606.891392     6.500000%      6.500000%
     Z1                           657.534601      3.698632      3.054288       6.752920    654.480313     6.750000%      6.750000%
     Z2                           632.563848      3.426387      8.299392      11.725780    624.264455     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:              Barbara Campbell
SERVICER:                                  Bank of America                                                   Deutsche Bank
LEAD UNDERWRITER:                    Donaldson, Lufkin & Jenrette                                       1761 E. St. Andrew Place
RECORD DATE:                                 May 31, 2000                                                 Santa Ana, CA 92705
DISTRIBUTION DATE:                          June 26, 2000                       FACTOR INFORMATION:          (800) 735-7777
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
                                    Page 1 of 5 (C) COPYRIGHT 2000 Deutsche Bank


<PAGE>


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


<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  46,998,535.19    264,366.76    434,933.69     699,300.45          0.00          0.00  46,563,601.50
     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   7,169,792.87     40,330.05          0.00      40,330.05          0.00          0.00   7,161,081.95
     I-PO           21,501.00      21,000.03          0.00     12,598.61      12,598.61          0.00          0.00       8,401.42
     IIA-1     121,111,453.00  75,646,860.46    409,753.83  1,020,378.20   1,430,132.03          0.00          0.00  74,626,482.26
     IIA-2       1,000,000.00     475,243.94      2,574.24     11,215.01      13,789.25          0.00          0.00     464,028.93
     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  13,618,176.36     73,765.12     56,951.34     130,716.46          0.00          0.00  13,561,225.02
     IIA-5      46,447,250.00  23,084,617.65    125,041.68    544,760.93     669,802.61          0.00          0.00  22,539,856.72
     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   3,899,570.17     21,122.67          0.00      21,122.67          0.00          0.00   3,854,816.24
     II-PO         350,133.00     307,737.06          0.00      6,469.27       6,469.27          0.00          0.00     301,267.79

------------------------------------------------------------------------------------------------------------------------------------
TOTALS         333,910,590.00 211,990,170.69  1,226,821.86  2,087,307.05   3,314,128.91          0.00          0.00 209,902,863.64
------------------------------------------------------------------------------------------------------------------------------------
*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         489.050985      2.750912      4.525774       7.276686    484.525211     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         598.294974      5.624995      0.000000       5.624995    597.568078     6.750000%      0.000000%
     I-PO       055240DH5         976.700153      0.000000    585.954607     585.954607    390.745547     0.000000%      6.500000%
     IIA-1      055240CZ6         624.605341      3.383279      8.425117      11.808396    616.180224     6.500000%      6.500000%
     IIA-2      055240DA0         475.243940      2.574240     11.215010      13.789250    464.028930     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         913.128976      4.946115      3.818714       8.764829    909.310263     6.500000%      6.500000%
     IIA-5      055240DD4         497.007200      2.692122     11.728594      14.420716    485.278606     6.500000%      6.500000%
     IIA-6      055240DE2           0.000000      0.000000      0.000000       0.000000      0.000000     6.500000%      6.500000%
     II-X *     055240DG7         519.007913      2.811293      0.000000       2.811293    513.051450     6.500000%      0.000000%
     II-PO      055240DU6         878.914755      0.000000     18.476607      18.476607    860.438148     0.000000%      0.000000%

------------------------------------------------------------------------------------------------------------------------------------
SELLER:                                    Bank of America                      ADMINISTRATOR:              Barbara Campbell
SERVICER:                                  Bank of America                                                   Deutsche Bank
LEAD UNDERWRITER:                    Donaldson, Lufkin & Jenrette                                       1761 E. St. Andrew Place
RECORD DATE:                                 May 31, 2000                                                 Santa Ana, CA 92705
DISTRIBUTION DATE:                          June 26, 2000                       FACTOR INFORMATION:          (800) 735-7777
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
                                    Page 2 of 5 (C) COPYRIGHT 2000 Deutsche Bank


<PAGE>


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

                         STATEMENT TO CERTIFICATEHOLDERS

<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   3,552,236.17     19,563.43      9,923.49      29,486.92          0.00          0.00   3,542,312.68
     B-1         2,231,794.00   2,099,048.70     11,560.21      5,863.88      17,424.09          0.00          0.00   2,093,184.82
     B-2         1,201,735.00   1,130,256.81      6,224.73      3,157.47       9,382.20          0.00          0.00   1,127,099.34
     B-3         1,030,060.00     968,792.85      5,335.49      2,706.41       8,041.90          0.00          0.00     966,086.44
     B-4           515,029.00     484,395.49      2,667.74      1,353.20       4,020.94          0.00          0.00     483,042.29
     B-5           686,706.32     645,861.58      3,556.99      1,804.27       5,361.26          0.00          0.00     644,057.31
     R-II               50.00           0.00          0.00          0.00           0.00          0.00          0.00           0.00


------------------------------------------------------------------------------------------------------------------------------------
TOTALS           9,442,256.32   8,880,591.60     48,908.59     24,808.72      73,717.31          0.00          0.00   8,855,782.88
------------------------------------------------------------------------------------------------------------------------------------
</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         940.520824      5.179783      2.627429       7.807212    937.893395     6.608826%      6.609023%
     B-1        055240DK8         940.520810      5.179784      2.627429       7.807212    937.893381     6.608826%      6.609023%
     B-2        055240DL6         940.520839      5.179786      2.627426       7.807212    937.893412     6.608826%      6.609023%
     B-3        055240DM4         940.520795      5.179786      2.627429       7.807215    937.893365     6.608826%      6.609023%
     B-4        055240DN2         940.520806      5.179786      2.627425       7.807211    937.893381     6.608826%      6.609023%
     B-5        055240DP7         940.520804      5.179783      2.627426       7.807209    937.893378     6.608826%      6.609023%
     R-II       055240DR3           0.000000      0.000000      0.000000       0.000000      0.000000     6.750000%      6.750000%

------------------------------------------------------------------------------------------------------------------------------------
SELLER:                                    Bank of America                      ADMINISTRATOR:              Barbara Campbell
SERVICER:                                  Bank of America                                                   Deutsche Bank
LEAD UNDERWRITER:                    Donaldson, Lufkin & Jenrette                                       1761 E. St. Andrew Place
RECORD DATE:                                 May 31, 2000                                                 Santa Ana, CA 92705
DISTRIBUTION DATE:                          June 26, 2000                       FACTOR INFORMATION:          (800) 735-7777
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
                                    Page 3 of 5 (C) COPYRIGHT 2000 Deutsche Bank


<PAGE>


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

                         STATEMENT TO CERTIFICATEHOLDERS

<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
Distribution Date:            June 26, 2000

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

<S>                                                                       <C>                         <C>
                BEGINNING BALANCE OF POOL                                 94,461,301.99               126,409,460.58
                LESS:         SCHEDULED PRINCIPAL                            (93,738.06)                (528,644.56)
                              PRINCIPAL PREPAYMENTS                         (357,630.92)              (1,132,102.23)
                              REPURCHASES                                          0.00                        0.00
                              LIQUIDATIONS                                         0.00                        0.00
                              OTHER UNSCHEDULED PRINCIPAL                          0.00                        0.00
                                                                          -------------               --------------
                ENDING BALANCE OF POOL                                    94,009,933.01               124,748,713.79
                                                                          =============               ==============

                BEGINNING NUMBER OF LOANS IN POOL                                   300                         400
                ENDING NUMBER OF LOANS IN POOL                                      299                         397

                WEIGHTED AVERAGE REMAINING TERM TO MATURITY                         322                         149
                WEIGHTED AVERAGE NET CONTRACT RATE                            7.510837%                   7.070001%

                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                   92,936,497.44               115,670,652.24
                STRIPPED INTEREST RATE                                        0.520744%                   0.219133%
</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               303,371.64          0.00           0.00          0.00          0.00           0.00
                     PERCENTAGE OF GROUP BAL.      0.1387%       0.0000%        0.0000%       0.0000%       0.0000%        0.0000%
                NUMBER OF LOANS                          1             0              0             0             0              0
                     PERCENTAGE OF LOANS           0.1437%       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          19,679.44                   40,588.81
                PLUS:         ADDITIONAL SERVICING COMPENSATION                    0.00                        0.00
                LESS:         AMTS. TO COVER PREPAYMENT INT. SHORTFALL          (318.68)                  (4,442.94)
                              DELINQUENT SERVICING FEES                       (1,685.91)                   2,274.27
                                                                          -------------               --------------
                SERVICING FEES COLLECTED FOR THE CURRENT DUE PERIOD           17,674.85                   38,420.14
                                                                          =============               ==============

                ADVANCED PRINCIPAL                                             7,769.67                   28,571.94
                ADVANCED INTEREST                                             48,828.59                   39,116.33
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
                  Page 4 of 5 (C) COPYRIGHT 2000 Deutsche Bank


<PAGE>



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

                         STATEMENT TO CERTIFICATEHOLDERS

<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
Distribution Date:            June 26, 2000
------------------------------------------------------------------------------------------------------------------------------------
                                                 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                 347,563.15          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                  10,067.77          0.00                         0.00          0.00                         0.00
       CLASS IIA-1                704,470.20          0.00                         0.00          0.00                         0.00
       CLASS IIA-2                  7,742.85          0.00                         0.00          0.00                         0.00
       CLASS IIA-3                      0.00          0.00                         0.00          0.00                         0.00
       CLASS IIA-4                 39,319.26          0.00                         0.00          0.00                         0.00
       CLASS IIA-5                376,103.52          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                  4,466.39          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                      1,489,733.15          0.00                         0.00          0.00                         0.00
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>

<TABLE>
<CAPTION>

<S>                                                                                                    <C>
                OTHER REPORTING ITEMS:

                GROUP I PERCENTAGE                                                                           95.91%
                GROUP I PREPAYMENT PERCENTAGE                                                               100.00%
                GROUP II PERCENTAGE                                                                          96.02%
                GROUP II PREPAYMENT PERCENTAGE                                                              100.00%

                SUBORDINATE PRINCIPAL DISTRIBUTION AMOUNT                                                 24,808.72
                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 2000 Deutsche Bank


<PAGE>

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


<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       8,401.42          0.00          8.68           8.68          0.00          0.00       8,392.74
     P2-M          350,133.00     301,267.79          0.00      8,267.91       8,267.91          0.00          0.00     292,999.88
     X1-M *    142,084,361.67  92,826,399.14     40,281.09          0.00      40,281.09          0.00          0.00  91,820,355.40
     X2-M *    187,559,494.52 114,323,205.16     20,880.25          0.00      20,880.25          0.00          0.00 113,453,441.18
     Y1             71,698.81      46,781.38        263.17        788.00       1,051.17          0.00          0.00      45,993.38
     Y2             99,676.65      60,492.90        327.67      1,213.41       1,541.08          0.00          0.00      59,279.49
     Z1        143,556,266.44  93,954,750.20    528,495.47  1,006,596.16   1,535,091.63          0.00          0.00  92,948,154.04
     Z2        199,253,620.42 124,386,952.83    673,762.64  1,266,351.12   1,940,113.76          0.00          0.00 123,120,601.71
     R-I                50.00           0.00          0.00          0.00           0.00          0.00          0.00           0.00


------------------------------------------------------------------------------------------------------------------------------------
TOTALS         343,352,946.32 218,758,646.52  1,264,010.29  2,283,225.28   3,547,235.57          0.00          0.00 216,475,421.24
------------------------------------------------------------------------------------------------------------------------------------
  *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>
     P1-M                         390.745547      0.000000      0.403702       0.403702    390.341845     0.000000%      0.000000%
     P2-M                         860.438148      0.000000     23.613627      23.613627    836.824521     0.000000%      0.000000%
     X1-M *                       653.318902      0.283501      0.000000       0.283501    646.238293     0.520728%      0.520728%
     X2-M *                       609.530354      0.111326      0.000000       0.111326    604.893085     0.219171%      0.219171%
     Y1                           652.470778      3.670493     10.990397      14.660890    641.480359     6.750000%      6.750000%
     Y2                           606.891392      3.287330     12.173444      15.460774    594.717929     6.500000%      6.500000%
     Z1                           654.480313      3.681452      7.011858      10.693310    647.468455     6.750000%      6.750000%
     Z2                           624.264455      3.381432      6.355474       9.736906    617.908982     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:              Barbara Campbell
SERVICER:                                  Bank of America                                                   Deutsche Bank
LEAD UNDERWRITER:                    Donaldson, Lufkin & Jenrette                                       1761 E. St. Andrew Place
RECORD DATE:                                June 30, 2000                                                 Santa Ana, CA 92705
DISTRIBUTION DATE:                          July 25, 2000                            FACTOR INFORMATION:     (800) 735-7777
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
                                    Page 1 of 5 (C) COPYRIGHT 2000 Deutsche Bank


<PAGE>


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

<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  46,563,601.50    261,920.26  1,003,606.70   1,265,526.96          0.00          0.00  45,559,994.80
     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   7,161,081.95     40,281.08          0.00      40,281.08          0.00          0.00   7,086,449.12
     I-PO           21,501.00       8,401.42          0.00          8.68           8.68          0.00          0.00       8,392.74
     IIA-1     121,111,453.00  74,626,482.26    404,226.78    778,646.44   1,182,873.22          0.00          0.00  73,847,835.82
     IIA-2       1,000,000.00     464,028.93      2,513.49      8,273.72      10,787.21          0.00          0.00     455,755.21
     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  13,561,225.02     73,456.64     57,558.84     131,015.48          0.00          0.00  13,503,666.18
     IIA-5      46,447,250.00  22,539,856.72    122,090.89    401,889.75     523,980.64          0.00          0.00  22,137,966.97
     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   3,854,816.24     20,880.25          0.00      20,880.25          0.00          0.00   3,808,423.73
     II-PO         350,133.00     301,267.79          0.00      8,267.91       8,267.91          0.00          0.00     292,999.88




------------------------------------------------------------------------------------------------------------------------------------
TOTALS         333,910,590.00 209,902,863.64  1,215,236.90  2,258,252.04   3,473,488.94          0.00          0.00 207,644,611.60
------------------------------------------------------------------------------------------------------------------------------------
*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         484.525211      2.725454     10.443195      13.168649    474.082016     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         597.568078      5.624999      0.000000       5.624999    591.340221     6.750000%      0.000000%
     I-PO       055240DH5         390.745547      0.000000      0.403702       0.403702    390.341845     0.000000%      6.500000%
     IIA-1      055240CZ6         616.180224      3.337643      6.429173       9.766816    609.751052     6.500000%      6.500000%
     IIA-2      055240DA0         464.028930      2.513490      8.273720      10.787210    455.755210     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         909.310263      4.925431      3.859448       8.784879    905.450815     6.500000%      6.500000%
     IIA-5      055240DD4         485.278606      2.628592      8.652606      11.281198    476.626000     6.500000%      6.500000%
     IIA-6      055240DE2           0.000000      0.000000      0.000000       0.000000      0.000000     6.500000%      6.500000%
     II-X *     055240DG7         513.051450      2.779028      0.000000       2.779028    506.876904     6.500000%      0.000000%
     II-PO      055240DU6         860.438148      0.000000     23.613627      23.613627    836.824521     0.000000%      0.000000%



------------------------------------------------------------------------------------------------------------------------------------
SELLER:                                    Bank of America                      ADMINISTRATOR:              Barbara Campbell
SERVICER:                                  Bank of America                                                   Deutsche Bank
LEAD UNDERWRITER:                    Donaldson, Lufkin & Jenrette                                       1761 E. St. Andrew Place
RECORD DATE:                                June 30, 2000                                                 Santa Ana, CA 92705
DISTRIBUTION DATE:                          July 25, 2000                            FACTOR INFORMATION:     (800) 735-7777
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
                                    Page 2 of 5 (C) COPYRIGHT 2000 Deutsche Bank


<PAGE>


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

                         STATEMENT TO CERTIFICATEHOLDERS

<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   3,542,312.68     19,509.35      9,989.29      29,498.64          0.00          0.00   3,532,323.39
     B-1         2,231,794.00   2,093,184.82     11,528.26      5,902.77      17,431.03          0.00          0.00   2,087,282.05
     B-2         1,201,735.00   1,127,099.34      6,207.52      3,178.41       9,385.93          0.00          0.00   1,123,920.93
     B-3         1,030,060.00     966,086.44      5,320.74      2,724.36       8,045.10          0.00          0.00     963,362.08
     B-4           515,029.00     483,042.29      2,660.36      1,362.18       4,022.54          0.00          0.00     481,680.11
     B-5           686,706.32     644,057.31      3,547.16      1,816.23       5,363.39          0.00          0.00     642,241.08
     R-II               50.00           0.00          0.00          0.00           0.00          0.00          0.00           0.00

------------------------------------------------------------------------------------------------------------------------------------
TOTALS           9,442,256.32   8,855,782.88     48,773.39     24,973.24      73,746.63          0.00          0.00   8,830,809.64
------------------------------------------------------------------------------------------------------------------------------------
</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         937.893395      5.165465      2.644851       7.810315    935.248544     6.609023%      6.609224%
     B-1        055240DK8         937.893381      5.165468      2.644854       7.810322    935.248527     6.609023%      6.609224%
     B-2        055240DL6         937.893412      5.165465      2.644851       7.810316    935.248561     6.609023%      6.609224%
     B-3        055240DM4         937.893365      5.165466      2.644856       7.810322    935.248510     6.609023%      6.609224%
     B-4        055240DN2         937.893381      5.165457      2.644861       7.810317    935.248520     6.609023%      6.609224%
     B-5        055240DP7         937.893378      5.165469      2.644842       7.810311    935.248535     6.609023%      6.609224%
     R-II       055240DR3           0.000000      0.000000      0.000000       0.000000      0.000000     6.750000%      6.750000%


------------------------------------------------------------------------------------------------------------------------------------
SELLER:                                    Bank of America                      ADMINISTRATOR:              Barbara Campbell
SERVICER:                                  Bank of America                                                   Deutsche Bank
LEAD UNDERWRITER:                    Donaldson, Lufkin & Jenrette                                       1761 E. St. Andrew Place
RECORD DATE:                                June 30, 2000                                                 Santa Ana, CA 92705
DISTRIBUTION DATE:                          July 25, 2000                       FACTOR INFORMATION:          (800) 735-7777
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
                                    Page 3 of 5 (C) COPYRIGHT 2000 Deutsche Bank


<PAGE>


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

                         STATEMENT TO CERTIFICATEHOLDERS

<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
Distribution Date:            July 25, 2000
------------------------------------------------------------------------------------------------------------------------------------


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

<S>                                                                       <C>                         <C>
                BEGINNING BALANCE OF POOL                                 94,009,933.01               124,748,713.79
                LESS:         SCHEDULED PRINCIPAL                            (91,954.61)                (529,464.81)
                              PRINCIPAL PREPAYMENTS                         (915,438.26)                (746,367.60)
                              REPURCHASES                                          0.00                        0.00
                              LIQUIDATIONS                                         0.00                        0.00
                              OTHER UNSCHEDULED PRINCIPAL                          0.00                        0.00
                                                                          -------------               --------------
                ENDING BALANCE OF POOL                                    93,002,540.14               123,472,881.38
                                                                          =============               ==============

                BEGINNING NUMBER OF LOANS IN POOL                                   299                         397
                ENDING NUMBER OF LOANS IN POOL                                      295                         395

                WEIGHTED AVERAGE REMAINING TERM TO MATURITY                         321                         148
                WEIGHTED AVERAGE NET CONTRACT RATE                            7.513569%                   7.070457%

                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                   92,826,399.14               114,323,205.16
                STRIPPED INTEREST RATE                                        0.520728%                   0.219171%
</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               336,906.52          0.00           0.00          0.00          0.00           0.00
                     PERCENTAGE OF GROUP BAL.      0.1556%       0.0000%        0.0000%       0.0000%       0.0000%        0.0000%
                NUMBER OF LOANS                          1             0              0             0             0              0
                     PERCENTAGE OF LOANS           0.1449%       0.0000%        0.0000%       0.0000%       0.0000%        0.0000%
GROUP II        PRINCIPAL BALANCE               422,801.87          0.00           0.00          0.00          0.00           0.00
                     PERCENTAGE OF GROUP BAL.      0.1953%       0.0000%        0.0000%       0.0000%       0.0000%        0.0000%
                NUMBER OF LOANS                          1             0              0             0             0              0
                     PERCENTAGE OF LOANS           0.1449%       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          19,585.40                   40,054.75
                PLUS:         ADDITIONAL SERVICING COMPENSATION                    0.00                        0.00
                LESS:         AMTS. TO COVER PREPAYMENT INT. SHORTFALL        (3,980.45)                  (2,117.51)
                              DELINQUENT SERVICING FEES                       (1,632.63)                   2,844.84
                                                                          -------------               --------------
                SERVICING FEES COLLECTED FOR THE CURRENT DUE PERIOD           13,972.32                   40,782.08
                                                                          =============               ==============

                ADVANCED PRINCIPAL                                             7,569.16                   34,455.32
                ADVANCED INTEREST                                             47,286.91                   46,798.74
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
                                    Page 4 of 5 (C) COPYRIGHT 2000 Deutsche Bank



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

                         STATEMENT TO CERTIFICATEHOLDERS

<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
Distribution Date:            July 25, 2000
------------------------------------------------------------------------------------------------------------------------------------

                                                 OTHER                                   CUMULATIVE
                                PREPAYMENT    UNSCHEDULED                 CERTIFICATE      UNPAID                     CUMULATIVE
                                PRINCIPAL      PRINCIPAL                    INTEREST      INTEREST                     REALIZED
     CLASS                     DISTRIBUTED    DISTRIBUTED                  SHORTFALL      SHORTFALL                     LOSSES
------------------------------------------------------------------------------------------------------------------------------------
<S>             <C>               <C>                 <C>                          <C>           <C>                          <C>
       CLASS IA-1                 915,430.34          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                       7.92          0.00                         0.00          0.00                         0.00
       CLASS IIA-1                463,207.00          0.00                         0.00          0.00                         0.00
       CLASS IIA-2                  4,921.93          0.00                         0.00          0.00                         0.00
       CLASS IIA-3                      0.00          0.00                         0.00          0.00                         0.00
       CLASS IIA-4                 34,241.03          0.00                         0.00          0.00                         0.00
       CLASS IIA-5                239,079.17          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                  4,918.48          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                      1,661,805.86          0.00                         0.00          0.00                         0.00
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>


<TABLE>
<CAPTION>

<S>                                                                                                          <C>
                OTHER REPORTING ITEMS:


                GROUP I PERCENTAGE                                                                           95.89%
                GROUP I PREPAYMENT PERCENTAGE                                                               100.00%
                GROUP II PERCENTAGE                                                                          95.99%
                GROUP II PREPAYMENT PERCENTAGE                                                              100.00%

                SUBORDINATE PRINCIPAL DISTRIBUTION AMOUNT                                                 24,973.24
                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 2000 Deutsche Bank


<PAGE>


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


<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       8,392.74          0.00          8.73           8.73          0.00          0.00       8,384.01
     P2-M          350,133.00     292,999.88          0.00      1,318.89       1,318.89          0.00          0.00     291,680.99
     X1-M *    142,084,361.67  91,820,355.40     39,861.28          0.00      39,861.28          0.00          0.00  91,009,813.35
     X2-M *    187,559,494.52 113,453,441.18     20,628.96          0.00      20,628.96          0.00          0.00 112,050,401.88
     Y1             71,698.81      45,993.38        258.72        308.20         566.92          0.00          0.00      45,685.18
     Y2             99,676.65      59,279.49        321.10        591.62         912.72          0.00          0.00      58,687.87
     Z1        143,556,266.44  92,948,154.04    522,833.37    811,582.05   1,334,415.42          0.00          0.00  92,136,571.99
     Z2        199,253,620.42 123,120,601.71    666,903.24  1,446,108.03   2,113,011.27          0.00          0.00 121,674,493.68
     R-I                50.00           0.00          0.00          0.00           0.00          0.00          0.00           0.00


------------------------------------------------------------------------------------------------------------------------------------
TOTALS         343,352,946.32 216,475,421.24  1,250,806.67  2,259,917.52   3,510,724.19          0.00          0.00 214,215,503.72
------------------------------------------------------------------------------------------------------------------------------------
  *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                         390.341845      0.000000      0.406028       0.406028    389.935817     0.000000%      0.000000%
     P2-M                         836.824521      0.000000      3.766826       3.766826    833.057695     0.000000%      0.000000%
     X1-M *                       646.238293      0.280547      0.000000       0.280547    640.533640     0.520947%      0.520947%
     X2-M *                       604.893085      0.109986      0.000000       0.109986    597.412582     0.218193%      0.218193%
     Y1                           641.480359      3.608428      4.298489       7.906917    637.181822     6.750000%      6.750000%
     Y2                           594.717929      3.221416      5.935381       9.156798    588.782537     6.500000%      6.500000%
     Z1                           647.468455      3.642010      5.653407       9.295417    641.815048     6.750000%      6.750000%
     Z2                           617.908982      3.347007      7.257625      10.604632    610.651357     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:              Barbara Campbell
SERVICER:                                  Bank of America                                                   Deutsche Bank
LEAD UNDERWRITER:                    Donaldson, Lufkin & Jenrette                                       1761 E. St. Andrew Place
RECORD DATE:                                July 31, 2000                                                 Santa Ana, CA 92705
DISTRIBUTION DATE:                         August 25, 2000                      FACTOR INFORMATION:          (800) 735-7777
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
                                    Page 1 of 5 (C) COPYRIGHT 2000 Deutsche Bank


<PAGE>


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

                         STATEMENT TO CERTIFICATEHOLDERS


<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  45,559,994.80    256,274.97    808,071.80   1,064,346.77          0.00          0.00  44,751,923.00
     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   7,086,449.12     39,861.27          0.00      39,861.27          0.00          0.00   7,017,024.06
     I-PO           21,501.00       8,392.74          0.00          8.73           8.73          0.00          0.00       8,384.01
     IIA-1     121,111,453.00  73,847,835.82    400,009.11    890,479.05   1,290,488.16          0.00          0.00  72,957,356.77
     IIA-2       1,000,000.00     455,755.21      2,468.67      9,621.87      12,090.54          0.00          0.00     446,133.34
     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  13,503,666.18     73,144.86     57,901.53     131,046.39          0.00          0.00  13,445,764.65
     IIA-5      46,447,250.00  22,137,966.97    119,913.99    467,375.23     587,289.22          0.00          0.00  21,670,591.74
     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   3,808,423.73     20,628.96          0.00      20,628.96          0.00          0.00   3,776,728.78
     II-PO         350,133.00     292,999.88          0.00      1,318.89       1,318.89          0.00          0.00     291,680.99

------------------------------------------------------------------------------------------------------------------------------------
TOTALS         333,910,590.00 207,644,611.60  1,202,169.34  2,234,777.10   3,436,946.44          0.00          0.00 205,409,834.50
------------------------------------------------------------------------------------------------------------------------------------
*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         474.082016      2.666711      8.408524      11.075235    465.673492     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         591.340221      5.624999      0.000000       5.624999    585.546934     6.750000%      0.000000%
     I-PO       055240DH5         390.341845      0.000000      0.406028       0.406028    389.935817     0.000000%      6.500000%
     IIA-1      055240CZ6         609.751052      3.302818      7.352559      10.655377    602.398493     6.500000%      6.500000%
     IIA-2      055240DA0         455.755210      2.468670      9.621870      12.090540    446.133340     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         905.450815      4.904525      3.882426       8.786951    901.568388     6.500000%      6.500000%
     IIA-5      055240DD4         476.626000      2.581724     10.062495      12.644219    466.563505     6.500000%      6.500000%
     IIA-6      055240DE2           0.000000      0.000000      0.000000       0.000000      0.000000     6.500000%      6.500000%
     II-X *     055240DG7         506.876904      2.745583      0.000000       2.745583    502.658507     6.500000%      0.000000%
     II-PO      055240DU6         836.824521      0.000000      3.766826       3.766826    833.057695     0.000000%      0.000000%



------------------------------------------------------------------------------------------------------------------------------------
SELLER:                                    Bank of America                      ADMINISTRATOR:              Barbara Campbell
SERVICER:                                  Bank of America                                                   Deutsche Bank
LEAD UNDERWRITER:                    Donaldson, Lufkin & Jenrette                                       1761 E. St. Andrew Place
RECORD DATE:                                July 31, 2000                                                 Santa Ana, CA 92705
DISTRIBUTION DATE:                         August 25, 2000                           FACTOR INFORMATION:     (800) 735-7777
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
                                    Page 2 of 5 (C) COPYRIGHT 2000 Deutsche Bank


<PAGE>


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

                         STATEMENT TO CERTIFICATEHOLDERS

<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   3,532,323.39     19,454.93     10,056.17      29,511.10          0.00          0.00   3,522,267.22
     B-1         2,231,794.00   2,087,282.05     11,496.10      5,942.28      17,438.38          0.00          0.00   2,081,339.77
     B-2         1,201,735.00   1,123,920.93      6,190.20      3,199.69       9,389.89          0.00          0.00   1,120,721.24
     B-3         1,030,060.00     963,362.08      5,305.90      2,742.59       8,048.49          0.00          0.00     960,619.49
     B-4           515,029.00     481,680.11      2,652.94      1,371.29       4,024.23          0.00          0.00     480,308.82
     B-5           686,706.32     642,241.08      3,537.26      1,828.40       5,365.66          0.00          0.00     640,412.68
     R-II               50.00           0.00          0.00          0.00           0.00          0.00          0.00           0.00


------------------------------------------------------------------------------------------------------------------------------------
TOTALS           9,442,256.32   8,830,809.64     48,637.33     25,140.42      73,777.75          0.00          0.00   8,805,669.22
------------------------------------------------------------------------------------------------------------------------------------
</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         935.248544      5.151056      2.662559       7.813615    932.585985     6.609224%      6.609428%
     B-1        055240DK8         935.248527      5.151058      2.662558       7.813615    932.585969     6.609224%      6.609428%
     B-2        055240DL6         935.248561      5.151052      2.662559       7.813611    932.586003     6.609224%      6.609428%
     B-3        055240DM4         935.248510      5.151059      2.662554       7.813613    932.585956     6.609224%      6.609428%
     B-4        055240DN2         935.248520      5.151050      2.662549       7.813599    932.585971     6.609224%      6.609428%
     B-5        055240DP7         935.248535      5.151052      2.662565       7.813617    932.585971     6.609224%      6.609428%
     R-II       055240DR3           0.000000      0.000000      0.000000       0.000000      0.000000     6.750000%      6.750000%



------------------------------------------------------------------------------------------------------------------------------------
SELLER:                                    Bank of America                      ADMINISTRATOR:              Barbara Campbell
SERVICER:                                  Bank of America                                                   Deutsche Bank
LEAD UNDERWRITER:                    Donaldson, Lufkin & Jenrette                                       1761 E. St. Andrew Place
RECORD DATE:                                July 31, 2000                                                 Santa Ana, CA 92705
DISTRIBUTION DATE:                         August 25, 2000                      FACTOR INFORMATION:          (800) 735-7777
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
                                    Page 3 of 5 (C) COPYRIGHT 2000 Deutsche Bank


<PAGE>


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

                         STATEMENT TO CERTIFICATEHOLDERS

<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
Distribution Date:            August 25, 2000
------------------------------------------------------------------------------------------------------------------------------------


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

<S>                                                                       <C>                         <C>
                BEGINNING BALANCE OF POOL                                 93,002,540.14               123,472,881.38
                LESS:         SCHEDULED PRINCIPAL                            (92,046.21)                (529,446.57)
                              PRINCIPAL PREPAYMENTS                         (719,852.79)                (918,571.95)
                              REPURCHASES                                          0.00                        0.00
                              LIQUIDATIONS                                         0.00                        0.00
                              OTHER UNSCHEDULED PRINCIPAL                          0.00                        0.00
                                                                          -------------               --------------
                ENDING BALANCE OF POOL                                    92,190,641.14               122,024,862.86
                                                                          =============               ==============

                BEGINNING NUMBER OF LOANS IN POOL                                   295                         395
                ENDING NUMBER OF LOANS IN POOL                                      293                         392

                WEIGHTED AVERAGE REMAINING TERM TO MATURITY                         320                         147
                WEIGHTED AVERAGE NET CONTRACT RATE                            7.513716%                   7.070546%

                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                   91,820,355.40               113,453,441.18
                STRIPPED INTEREST RATE                                        0.520947%                   0.218193%
</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          19,375.53                   39,663.91
                PLUS:         ADDITIONAL SERVICING COMPENSATION                    0.00                        0.00
                LESS:         AMTS. TO COVER PREPAYMENT INT. SHORTFALL        (1,503.50)                  (1,932.89)
                              DELINQUENT SERVICING FEES                       (1,437.70)                   2,082.16
                                                                          -------------               --------------
                SERVICING FEES COLLECTED FOR THE CURRENT DUE PERIOD           16,434.33                   39,813.18
                                                                          =============               ==============

                ADVANCED PRINCIPAL                                             6,554.65                   28,374.33
                ADVANCED INTEREST                                             41,378.10                   36,104.75

------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
                                    Page 4 of 5 (C) COPYRIGHT 2000 Deutsche Bank


<PAGE>


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

                         STATEMENT TO CERTIFICATEHOLDERS

<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
Distribution Date:            August 25, 2000
------------------------------------------------------------------------------------------------------------------------------------
                                                 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                 719,845.01          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                       7.78          0.00                         0.00          0.00                         0.00
       CLASS IIA-1                573,330.80          0.00                         0.00          0.00                         0.00
       CLASS IIA-2                  6,195.00          0.00                         0.00          0.00                         0.00
       CLASS IIA-3                      0.00          0.00                         0.00          0.00                         0.00
       CLASS IIA-4                 37,279.63          0.00                         0.00          0.00                         0.00
       CLASS IIA-5                300,917.37          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                    849.16          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                      1,638,424.74          0.00                         0.00          0.00                         0.00
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>

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

                GROUP I PERCENTAGE                                                                           95.85%
                GROUP I PREPAYMENT PERCENTAGE                                                               100.00%
                GROUP II PERCENTAGE                                                                          95.96%
                GROUP II PREPAYMENT PERCENTAGE                                                              100.00%

                SUBORDINATE PRINCIPAL DISTRIBUTION AMOUNT                                                 25,140.42
                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 2000 Deutsche Bank


<PAGE>

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


<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       8,384.01          0.00          8.63           8.63          0.00          0.00       8,375.38
     P2-M          350,133.00     291,680.99          0.00      1,368.63       1,368.63          0.00          0.00     290,312.36
     X1-M *    142,084,361.67  91,009,813.35     39,470.76          0.00      39,470.76          0.00          0.00  90,656,198.77
     X2-M *    187,559,494.52 112,050,401.88     20,457.28          0.00      20,457.28          0.00          0.00 111,067,685.80
     Y1             71,698.81      45,685.18        256.99          0.00         256.99          0.00          0.00      45,685.18
     Y2             99,676.65      58,687.87        317.89        196.67         514.56          0.00          0.00      58,491.20
     Z1        143,556,266.44  92,136,571.99    518,268.22    354,870.76     873,138.98          0.00          0.00  91,781,701.23
     Z2        199,253,620.42 121,674,493.68    659,070.18  1,028,588.32   1,687,658.50          0.00          0.00 120,645,905.36
     R-I                50.00           0.00          0.00          0.00           0.00          0.00          0.00           0.00

------------------------------------------------------------------------------------------------------------------------------------
TOTALS         343,352,946.32 214,215,503.72  1,237,841.32  1,385,033.01   2,622,874.33          0.00          0.00 212,830,470.71
------------------------------------------------------------------------------------------------------------------------------------
*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                         389.935817      0.000000      0.401377       0.401377    389.534440     0.000000%      0.000000%
     P2-M                         833.057695      0.000000      3.908886       3.908886    829.148809     0.000000%      0.000000%
     X1-M *                       640.533640      0.277798      0.000000       0.277798    638.044875     0.520437%      0.520437%
     X2-M *                       597.412582      0.109071      0.000000       0.109071    592.173092     0.219087%      0.219087%
     Y1                           637.181822      3.584299      0.000000       3.584299    637.181822     6.750000%      6.750000%
     Y2                           588.782537      3.189212      1.973032       5.162244    586.809457     6.500000%      6.500000%
     Z1                           641.815048      3.610210      2.471998       6.082207    639.343050     6.750000%      6.750000%
     Z2                           610.651357      3.307695      5.162206       8.469901    605.489150     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:              Barbara Campbell
SERVICER:                                  Bank of America                                                   Deutsche Bank
LEAD UNDERWRITER:                    Donaldson, Lufkin & Jenrette                                       1761 E. St. Andrew Place
RECORD DATE:                               August 31, 2000                                                Santa Ana, CA 92705
DISTRIBUTION DATE:                        September 25, 2000                    FACTOR INFORMATION:          (800) 735-7777
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
                                    Page 1 of 5 (C) COPYRIGHT 2000 Deutsche Bank


<PAGE>


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


<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  44,751,923.00    251,729.57    350,991.60     602,721.17          0.00          0.00  44,400,931.40
     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   7,017,024.06     39,470.77          0.00      39,470.77          0.00          0.00   6,990,388.37
     I-PO           21,501.00       8,384.01          0.00          8.63           8.63          0.00          0.00       8,375.38
     IIA-1     121,111,453.00  72,957,356.77    395,185.68    629,246.70   1,024,432.38          0.00          0.00  72,328,110.07
     IIA-2       1,000,000.00     446,133.34      2,416.56      6,443.59       8,860.15          0.00          0.00     439,689.75
     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  13,445,764.65     72,831.23     58,543.55     131,374.78          0.00          0.00  13,387,221.10
     IIA-5      46,447,250.00  21,670,591.74    117,382.37    312,992.77     430,375.14          0.00          0.00  21,357,598.97
     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   3,776,728.78     20,457.28          0.00      20,457.28          0.00          0.00   3,729,978.25
     II-PO         350,133.00     291,680.99          0.00      1,368.63       1,368.63          0.00          0.00     290,312.36


------------------------------------------------------------------------------------------------------------------------------------
TOTALS         333,910,590.00 205,409,834.50  1,189,340.97  1,359,595.47   2,548,936.44          0.00          0.00 204,050,239.03
------------------------------------------------------------------------------------------------------------------------------------
  *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         465.673492      2.619413      3.652301       6.271714    462.021192     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         585.546934      5.625001      0.000000       5.625001    583.324276     6.750000%      0.000000%
     I-PO       055240DH5         389.935817      0.000000      0.401377       0.401377    389.534440     0.000000%      6.500000%
     IIA-1      055240CZ6         602.398493      3.262992      5.195600       8.458592    597.202893     6.500000%      6.500000%
     IIA-2      055240DA0         446.133340      2.416560      6.443590       8.860150    439.689750     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         901.568388      4.883496      3.925475       8.808971    897.642913     6.500000%      6.500000%
     IIA-5      055240DD4         466.563505      2.527219      6.738672       9.265891    459.824833     6.500000%      6.500000%
     IIA-6      055240DE2           0.000000      0.000000      0.000000       0.000000      0.000000     6.500000%      6.500000%
     II-X *     055240DG7         502.658507      2.722733      0.000000       2.722733    496.436310     6.500000%      0.000000%
     II-PO      055240DU6         833.057695      0.000000      3.908886       3.908886    829.148809     0.000000%      0.000000%



------------------------------------------------------------------------------------------------------------------------------------
SELLER:                                    Bank of America                      ADMINISTRATOR:              Barbara Campbell
SERVICER:                                  Bank of America                                                   Deutsche Bank
LEAD UNDERWRITER:                    Donaldson, Lufkin & Jenrette                                       1761 E. St. Andrew Place
RECORD DATE:                               August 31, 2000                                                Santa Ana, CA 92705
DISTRIBUTION DATE:                        September 25, 2000                    FACTOR INFORMATION:          (800) 735-7777
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
                                    Page 2 of 5 (C) COPYRIGHT 2000 Deutsche Bank


<PAGE>


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


<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   3,522,267.22     19,400.14     10,175.01      29,575.15          0.00          0.00   3,512,092.21
     B-1         2,231,794.00   2,081,339.77     11,463.72      6,012.51      17,476.23          0.00          0.00   2,075,327.26
     B-2         1,201,735.00   1,120,721.24      6,172.77      3,237.50       9,410.27          0.00          0.00   1,117,483.74
     B-3         1,030,060.00     960,619.49      5,290.95      2,775.01       8,065.96          0.00          0.00     957,844.48
     B-4           515,029.00     480,308.82      2,645.47      1,387.50       4,032.97          0.00          0.00     478,921.32
     B-5           686,706.32     640,412.68      3,527.30      1,850.01       5,377.31          0.00          0.00     638,562.67
     R-II               50.00           0.00          0.00          0.00           0.00          0.00          0.00           0.00


------------------------------------------------------------------------------------------------------------------------------------
TOTALS           9,442,256.32   8,805,669.22     48,500.35     25,437.54      73,937.89          0.00          0.00   8,780,231.68
------------------------------------------------------------------------------------------------------------------------------------
</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         932.585985      5.136549      2.694024       7.830573    929.891961     6.609428%      6.609634%
     B-1        055240DK8         932.585969      5.136549      2.694026       7.830575    929.891943     6.609428%      6.609634%
     B-2        055240DL6         932.586003      5.136548      2.694022       7.830570    929.891981     6.609428%      6.609634%
     B-3        055240DM4         932.585956      5.136545      2.694028       7.830573    929.891929     6.609428%      6.609634%
     B-4        055240DN2         932.585971      5.136546      2.694023       7.830569    929.891948     6.609428%      6.609634%
     B-5        055240DP7         932.585971      5.136548      2.694034       7.830582    929.891937     6.609428%      6.609634%
     R-II       055240DR3           0.000000      0.000000      0.000000       0.000000      0.000000     6.750000%      6.750000%



------------------------------------------------------------------------------------------------------------------------------------
SELLER:                                    Bank of America                      ADMINISTRATOR:              Barbara Campbell
SERVICER:                                  Bank of America                                                   Deutsche Bank
LEAD UNDERWRITER:                    Donaldson, Lufkin & Jenrette                                       1761 E. St. Andrew Place
RECORD DATE:                               August 31, 2000                                                Santa Ana, CA 92705
DISTRIBUTION DATE:                        September 25, 2000                    FACTOR INFORMATION:          (800) 735-7777
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
                                    Page 3 of 5 (C) COPYRIGHT 2000 Deutsche Bank


<PAGE>


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

<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
Distribution Date:            September 25, 2000
------------------------------------------------------------------------------------------------------------------------------------


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

<S>                                                                       <C>                         <C>
                BEGINNING BALANCE OF POOL                                 92,190,641.14               122,024,862.86
                LESS:         SCHEDULED PRINCIPAL                            (92,784.81)                (531,311.02)
                              PRINCIPAL PREPAYMENTS                         (262,094.59)                (498,842.59)
                              REPURCHASES                                          0.00                        0.00
                              LIQUIDATIONS                                         0.00                        0.00
                              OTHER UNSCHEDULED PRINCIPAL                          0.00                        0.00
                                                                          -------------               --------------
                ENDING BALANCE OF POOL                                    91,835,761.74               120,994,709.25
                                                                          =============               ==============

                BEGINNING NUMBER OF LOANS IN POOL                                   293                         392
                ENDING NUMBER OF LOANS IN POOL                                      292                         390

                WEIGHTED AVERAGE REMAINING TERM TO MATURITY                         318                         146
                WEIGHTED AVERAGE NET CONTRACT RATE                            7.513158%                   7.070590%

                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                   91,009,813.35               112,050,401.88
                STRIPPED INTEREST RATE                                        0.520437%                   0.219087%
</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          19,206.38                   39,144.49
                PLUS:         ADDITIONAL SERVICING COMPENSATION                    0.00                        0.00
                LESS:         AMTS. TO COVER PREPAYMENT INT. SHORTFALL        (1,550.17)                    (450.39)
                              DELINQUENT SERVICING FEES                       (1,156.34)                   2,339.59
                                                                          -------------               --------------
                SERVICING FEES COLLECTED FOR THE CURRENT DUE PERIOD           16,499.87                   41,033.69
                                                                          =============               ==============
                ADVANCED PRINCIPAL                                             5,234.76                   31,490.68
                ADVANCED INTEREST                                             33,370.31                   39,167.42
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
                                    Page 4 of 5 (C) COPYRIGHT 2000 Deutsche Bank


<PAGE>


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

                         STATEMENT TO CERTIFICATEHOLDERS

<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
Distribution Date:            September 25, 2000
------------------------------------------------------------------------------------------------------------------------------------
                                                 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                 262,088.15          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                       6.44          0.00                         0.00          0.00                         0.00
       CLASS IIA-1                311,220.04          0.00                         0.00          0.00                         0.00
       CLASS IIA-2                  3,186.94          0.00                         0.00          0.00                         0.00
       CLASS IIA-3                      0.00          0.00                         0.00          0.00                         0.00
       CLASS IIA-4                 28,955.14          0.00                         0.00          0.00                         0.00
       CLASS IIA-5                154,803.55          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                    676.91          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                        760,937.18          0.00                         0.00          0.00                         0.00
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>


<TABLE>
<CAPTION>

<S>                                                                                                    <C>
                OTHER REPORTING ITEMS:


                GROUP I PERCENTAGE                                                                           95.82%
                GROUP I PREPAYMENT PERCENTAGE                                                               100.00%
                GROUP II PERCENTAGE                                                                          95.93%
                GROUP II PREPAYMENT PERCENTAGE                                                              100.00%

                SUBORDINATE PRINCIPAL DISTRIBUTION AMOUNT                                                 25,437.54
                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 2000 Deutsche Bank


<PAGE>

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


<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       8,375.38          0.00          8.68           8.68          0.00          0.00       8,366.70
     P2-M          350,133.00     290,312.36          0.00      1,370.67       1,370.67          0.00          0.00     288,941.69
     X1-M *    142,084,361.67  90,656,198.77     39,320.93          0.00      39,320.93          0.00          0.00  90,539,399.89
     X2-M *    187,559,494.52 111,067,685.80     20,204.05          0.00      20,204.05          0.00          0.00 109,928,721.10
     Y1             71,698.81      45,685.18        256.98          0.00         256.98          0.00          0.00      45,685.18
     Y2             99,676.65      58,491.20        316.83        198.00         514.83          0.00          0.00      58,293.20
     Z1        143,556,266.44  91,781,701.23    516,272.07    118,062.35     634,334.42          0.00          0.00  91,663,638.88
     Z2        199,253,620.42 120,645,905.36    653,498.65  1,183,994.32   1,837,492.97          0.00          0.00 119,461,911.04
     R-I                50.00           0.00          0.00          0.00           0.00          0.00          0.00           0.00

------------------------------------------------------------------------------------------------------------------------------------
TOTALS         343,352,946.32 212,830,470.71  1,229,869.51  1,303,634.02   2,533,503.53          0.00          0.00 211,526,836.69
------------------------------------------------------------------------------------------------------------------------------------
*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                         389.534440      0.000000      0.403702       0.403702    389.130738     0.000000%      0.000000%
     P2-M                         829.148809      0.000000      3.914712       3.914712    825.234097     0.000000%      0.000000%
     X1-M *                       638.044875      0.276744      0.000000       0.276744    637.222836     0.520484%      0.520484%
     X2-M *                       592.173092      0.107721      0.000000       0.107721    586.100540     0.218289%      0.218289%
     Y1                           637.181822      3.584160      0.000000       3.584160    637.181822     6.750000%      6.750000%
     Y2                           586.809457      3.178578      1.986454       5.165032    584.823034     6.500000%      6.500000%
     Z1                           639.343050      3.596305      0.822412       4.418716    638.520638     6.750000%      6.750000%
     Z2                           605.489150      3.279733      5.942147       9.221880    599.547003     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:              Barbara Campbell
SERVICER:                                  Bank of America                                                   Deutsche Bank
LEAD UNDERWRITER:                    Donaldson, Lufkin & Jenrette                                       1761 E. St. Andrew Place
RECORD DATE:                              September 29, 2000                                              Santa Ana, CA 92705
DISTRIBUTION DATE:                         October 25, 2000                          FACTOR INFORMATION:     (800) 735-7777
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>

                                    Page 1 of 5 (C) COPYRIGHT 2000 Deutsche Bank


<PAGE>


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

                         STATEMENT TO CERTIFICATEHOLDERS


<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  44,400,931.40    249,755.24    114,144.04     363,899.28          0.00          0.00  44,286,787.36
     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   6,990,388.37     39,320.95          0.00      39,320.95          0.00          0.00   6,981,418.28
     I-PO           21,501.00       8,375.38          0.00          8.68           8.68          0.00          0.00       8,366.70
     IIA-1     121,111,453.00  72,328,110.07    391,777.26    726,253.50   1,118,030.76          0.00          0.00  71,601,856.57
     IIA-2       1,000,000.00     439,689.75      2,381.65      7,611.90       9,993.55          0.00          0.00     432,077.85
     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  13,387,221.10     72,514.11     58,896.24     131,410.35          0.00          0.00  13,328,324.86
     IIA-5      46,447,250.00  21,357,598.97    115,686.99    369,742.44     485,429.43          0.00          0.00  20,987,856.53
     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   3,729,978.25     20,204.05          0.00      20,204.05          0.00          0.00   3,684,464.46
     II-PO         350,133.00     290,312.36          0.00      1,370.67       1,370.67          0.00          0.00     288,941.69

------------------------------------------------------------------------------------------------------------------------------------
TOTALS         333,910,590.00 204,050,239.03  1,181,507.76  1,278,027.47   2,459,535.23          0.00          0.00 202,772,211.56
------------------------------------------------------------------------------------------------------------------------------------
*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         462.021192      2.598869      1.187745       3.786614    460.833447     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         583.324276      5.625002      0.000000       5.625002    582.575752     6.750000%      0.000000%
     I-PO       055240DH5         389.534440      0.000000      0.403702       0.403702    389.130738     0.000000%      6.500000%
     IIA-1      055240CZ6         597.202893      3.234849      5.996572       9.231421    591.206321     6.500000%      6.500000%
     IIA-2      055240DA0         439.689750      2.381650      7.611900       9.993550    432.077850     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         897.642913      4.862232      3.949124       8.811356    893.693790     6.500000%      6.500000%
     IIA-5      055240DD4         459.824833      2.490718      7.960481      10.451198    451.864352     6.500000%      6.500000%
     IIA-6      055240DE2           0.000000      0.000000      0.000000       0.000000      0.000000     6.500000%      6.500000%
     II-X *     055240DG7         496.436310      2.689030      0.000000       2.689030    490.378716     6.500000%      0.000000%
     II-PO      055240DU6         829.148809      0.000000      3.914712       3.914712    825.234097     0.000000%      0.000000%



------------------------------------------------------------------------------------------------------------------------------------
SELLER:                                    Bank of America                      ADMINISTRATOR:              Barbara Campbell
SERVICER:                                  Bank of America                                                   Deutsche Bank
LEAD UNDERWRITER:                    Donaldson, Lufkin & Jenrette                                       1761 E. St. Andrew Place
RECORD DATE:                              September 29, 2000                                              Santa Ana, CA 92705
DISTRIBUTION DATE:                         October 25, 2000                     FACTOR INFORMATION:          (800) 735-7777
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
                                    Page 2 of 5 (C) COPYRIGHT 2000 Deutsche Bank


<PAGE>


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

                         STATEMENT TO CERTIFICATEHOLDERS


<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   3,512,092.21     19,344.70     10,242.62      29,587.32          0.00          0.00   3,501,849.59
     B-1         2,231,794.00   2,075,327.26     11,430.96      6,052.46      17,483.42          0.00          0.00   2,069,274.80
     B-2         1,201,735.00   1,117,483.74      6,155.13      3,259.01       9,414.14          0.00          0.00   1,114,224.73
     B-3         1,030,060.00     957,844.48      5,275.83      2,793.44       8,069.27          0.00          0.00     955,051.04
     B-4           515,029.00     478,921.32      2,637.91      1,396.72       4,034.63          0.00          0.00     477,524.60
     B-5           686,706.32     638,562.67      3,517.22      1,862.30       5,379.52          0.00          0.00     636,700.37
     R-II               50.00           0.00          0.00          0.00           0.00          0.00          0.00           0.00


------------------------------------------------------------------------------------------------------------------------------------
TOTALS           9,442,256.32   8,780,231.68     48,361.75     25,606.55      73,968.30          0.00          0.00   8,754,625.13
------------------------------------------------------------------------------------------------------------------------------------
</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         929.891961      5.121870      2.711925       7.833795    927.180036     6.609634%      6.609843%
     B-1        055240DK8         929.891943      5.121871      2.711926       7.833796    927.180018     6.609634%      6.609843%
     B-2        055240DL6         929.891981      5.121870      2.711921       7.833790    927.180060     6.609634%      6.609843%
     B-3        055240DM4         929.891929      5.121867      2.711920       7.833786    927.180009     6.609634%      6.609843%
     B-4        055240DN2         929.891948      5.121867      2.711925       7.833792    927.180023     6.609634%      6.609843%
     B-5        055240DP7         929.891937      5.121869      2.711931       7.833800    927.180006     6.609634%      6.609843%
     R-II       055240DR3           0.000000      0.000000      0.000000       0.000000      0.000000     6.750000%      6.750000%


------------------------------------------------------------------------------------------------------------------------------------
SELLER:                                    Bank of America                      ADMINISTRATOR:              Barbara Campbell
SERVICER:                                  Bank of America                                                   Deutsche Bank
LEAD UNDERWRITER:                    Donaldson, Lufkin & Jenrette                                       1761 E. St. Andrew Place
RECORD DATE:                              September 29, 2000                                              Santa Ana, CA 92705
DISTRIBUTION DATE:                         October 25, 2000                          FACTOR INFORMATION:     (800) 735-7777
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
                                    Page 3 of 5 (C) COPYRIGHT 2000 Deutsche Bank


<PAGE>


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

                         STATEMENT TO CERTIFICATEHOLDERS
<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
Distribution Date:            October 25, 2000
------------------------------------------------------------------------------------------------------------------------------------


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

<S>                                                                       <C>                         <C>
                BEGINNING BALANCE OF POOL                                 91,835,761.74               120,994,709.25
                LESS:         SCHEDULED PRINCIPAL                            (93,454.36)                (532,317.34)
                              PRINCIPAL PREPAYMENTS                          (24,616.67)                (653,245.65)
                              REPURCHASES                                          0.00                        0.00
                              LIQUIDATIONS                                         0.00                        0.00
                              OTHER UNSCHEDULED PRINCIPAL                          0.00                        0.00
                                                                          -------------               --------------
                ENDING BALANCE OF POOL                                    91,717,690.71               119,809,146.26
                                                                          =============               ==============

                BEGINNING NUMBER OF LOANS IN POOL                                   292                         390
                ENDING NUMBER OF LOANS IN POOL                                      292                         388

                WEIGHTED AVERAGE REMAINING TERM TO MATURITY                         317                         144
                WEIGHTED AVERAGE NET CONTRACT RATE                            7.513183%                   7.069451%

                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                   90,656,198.77               111,067,685.80
                STRIPPED INTEREST RATE                                        0.520484%                   0.218289%
</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               510,063.71          0.00           0.00          0.00          0.00           0.00
                     PERCENTAGE OF GROUP BAL.      0.2411%       0.0000%        0.0000%       0.0000%       0.0000%        0.0000%
                NUMBER OF LOANS                          2             0              0             0             0              0
                     PERCENTAGE OF LOANS           0.2941%       0.0000%        0.0000%       0.0000%       0.0000%        0.0000%
GROUP II        PRINCIPAL BALANCE               231,691.04          0.00           0.00          0.00          0.00           0.00
                     PERCENTAGE OF GROUP BAL.      0.1095%       0.0000%        0.0000%       0.0000%       0.0000%        0.0000%
                NUMBER OF LOANS                          1             0              0             0             0              0
                     PERCENTAGE OF LOANS           0.1471%       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          19,132.45                   38,785.61
                PLUS:         ADDITIONAL SERVICING COMPENSATION                    0.00                        0.00
                LESS:         AMTS. TO COVER PREPAYMENT INT. SHORTFALL             0.00                   (1,147.59)
                              DELINQUENT SERVICING FEES                       (2,692.99)                   4,630.62
                                                                          -------------               --------------
                SERVICING FEES COLLECTED FOR THE CURRENT DUE PERIOD           16,439.46                   42,268.64
                                                                          =============               ==============

                ADVANCED PRINCIPAL                                            12,228.09                   60,388.99
                ADVANCED INTEREST                                             77,732.57                   77,808.05
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>

                                    Page 4 of 5 (C) COPYRIGHT 2000 Deutsche Bank


<PAGE>


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

                         STATEMENT TO CERTIFICATEHOLDERS


<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
Distribution Date:            October 25, 2000
------------------------------------------------------------------------------------------------------------------------------------
                                                 OTHER                                   CUMULATIVE
                                PREPAYMENT    UNSCHEDULED                 CERTIFICATE      UNPAID                     CUMULATIVE
                                PRINCIPAL      PRINCIPAL                    INTEREST      INTEREST                     REALIZED
     CLASS                     DISTRIBUTED    DISTRIBUTED                  SHORTFALL      SHORTFALL                     LOSSES
------------------------------------------------------------------------------------------------------------------------------------
<S>             <C>                <C>                <C>                          <C>           <C>                          <C>
       CLASS IA-1                  24,614.80          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                       1.87          0.00                         0.00          0.00                         0.00
       CLASS IIA-1                407,622.85          0.00                         0.00          0.00                         0.00
       CLASS IIA-2                  4,272.32          0.00                         0.00          0.00                         0.00
       CLASS IIA-3                      0.00          0.00                         0.00          0.00                         0.00
       CLASS IIA-4                 33,056.57          0.00                         0.00          0.00                         0.00
       CLASS IIA-5                207,524.60          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                    769.31          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                        677,862.32          0.00                         0.00          0.00                         0.00
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>


<TABLE>
<CAPTION>

<S>                                                                                                    <C>
                OTHER REPORTING ITEMS:

                GROUP I PERCENTAGE                                                                           95.81%
                GROUP I PREPAYMENT PERCENTAGE                                                               100.00%
                GROUP II PERCENTAGE                                                                          95.92%
                GROUP II PREPAYMENT PERCENTAGE                                                              100.00%

                SUBORDINATE PRINCIPAL DISTRIBUTION AMOUNT                                                 25,606.55
                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 2000 Deutsche Bank


<PAGE>

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


<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       8,366.70          0.00          8.73           8.73          0.00          0.00       8,357.97
     P2-M          350,133.00     288,941.69          0.00      6,500.30       6,500.30          0.00          0.00     282,441.39
     X1-M *    142,084,361.67  90,539,399.89     39,270.48          0.00      39,270.48          0.00          0.00  89,096,234.31
     X2-M *    187,559,494.52 109,928,721.10     19,957.52          0.00      19,957.52          0.00          0.00 108,621,411.05
     Y1             71,698.81      45,685.18        256.93      1,274.95       1,531.88          0.00          0.00      44,410.23
     Y2             99,676.65      58,293.20        315.75      1,821.04       2,136.79          0.00          0.00      56,472.16
     Z1        143,556,266.44  91,663,638.88    515,607.97  1,443,161.46   1,958,769.43          0.00          0.00  90,220,477.42
     Z2        199,253,620.42 119,461,911.04    647,085.39  1,612,474.79   2,259,560.18          0.00          0.00 117,849,436.25
     R-I                50.00           0.00          0.00          0.00           0.00          0.00          0.00           0.00


------------------------------------------------------------------------------------------------------------------------------------
TOTALS         343,352,946.32 211,526,836.69  1,222,494.04  3,065,241.27   4,287,735.31          0.00          0.00 208,461,595.42
------------------------------------------------------------------------------------------------------------------------------------
  *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>
     P1-M                         389.130738      0.000000      0.406028       0.406028    388.724710     0.000000%      0.000000%
     P2-M                         825.234097      0.000000     18.565231      18.565231    806.668866     0.000000%      0.000000%
     X1-M *                       637.222836      0.276388      0.000000       0.276388    627.065732     0.520487%      0.520487%
     X2-M *                       586.100540      0.106406      0.000000       0.106406    579.130432     0.217860%      0.217860%
     Y1                           637.181822      3.583462     17.782085      21.365548    619.399798     6.750000%      6.750000%
     Y2                           584.823034      3.167743     18.269484      21.437227    566.553559     6.500000%      6.500000%
     Z1                           638.520638      3.591679     10.052932      13.644611    628.467706     6.750000%      6.750000%
     Z2                           599.547003      3.247546      8.092575      11.340121    591.454429     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:              Barbara Campbell
SERVICER:                                  Bank of America                                                   Deutsche Bank
LEAD UNDERWRITER:                    Donaldson, Lufkin & Jenrette                                       1761 E. St. Andrew Place
RECORD DATE:                               October 31, 2000                                               Santa Ana, CA 92705
DISTRIBUTION DATE:                        November 27, 2000                     FACTOR INFORMATION:          (800) 735-7777
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
                                    Page 1 of 5 (C) COPYRIGHT 2000 Deutsche Bank


<PAGE>


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

                         STATEMENT TO CERTIFICATEHOLDERS


<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  44,286,787.36    249,113.18  1,440,544.63   1,689,657.81          0.00          0.00  42,846,242.73
     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   6,981,418.28     39,270.47          0.00      39,270.47          0.00          0.00   6,847,519.71
     I-PO           21,501.00       8,366.70          0.00          8.73           8.73          0.00          0.00       8,357.97
     IIA-1     121,111,453.00  71,601,856.57    387,843.39    994,900.98   1,382,744.37          0.00          0.00  70,606,955.59
     IIA-2       1,000,000.00     432,077.85      2,340.42     10,862.52      13,202.94          0.00          0.00     421,215.33
     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  13,328,324.86     72,195.09     59,122.16     131,317.25          0.00          0.00  13,269,202.70
     IIA-5      46,447,250.00  20,987,856.53    113,684.22    527,638.77     641,322.99          0.00          0.00  20,460,217.76
     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   3,684,464.46     19,957.52          0.00      19,957.52          0.00          0.00   3,625,913.33
     II-PO         350,133.00     288,941.69          0.00      6,500.30       6,500.30          0.00          0.00     282,441.39

------------------------------------------------------------------------------------------------------------------------------------
TOTALS         333,910,590.00 202,772,211.56  1,174,271.80  3,039,578.09   4,213,849.89          0.00          0.00 199,732,633.47
------------------------------------------------------------------------------------------------------------------------------------
  *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         460.833447      2.592188     14.989824      17.582012    445.843623     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         582.575752      5.624999      0.000000       5.624999    571.402369     6.750000%      0.000000%
     I-PO       055240DH5         389.130738      0.000000      0.406028       0.406028    388.724710     0.000000%      6.500000%
     IIA-1      055240CZ6         591.206321      3.202368      8.214756      11.417123    582.991566     6.500000%      6.500000%
     IIA-2      055240DA0         432.077850      2.340420     10.862520      13.202940    421.215330     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         893.693790      4.840841      3.964272       8.805113    889.729517     6.500000%      6.500000%
     IIA-5      055240DD4         451.864352      2.447599     11.359957      13.807556    440.504395     6.500000%      6.500000%
     IIA-6      055240DE2           0.000000      0.000000      0.000000       0.000000      0.000000     6.500000%      6.500000%
     II-X *     055240DG7         490.378716      2.656219      0.000000       2.656219    482.585934     6.500000%      0.000000%
     II-PO      055240DU6         825.234097      0.000000     18.565231      18.565231    806.668866     0.000000%      0.000000%

------------------------------------------------------------------------------------------------------------------------------------
SELLER:                                    Bank of America                      ADMINISTRATOR:              Barbara Campbell
SERVICER:                                  Bank of America                                                   Deutsche Bank
LEAD UNDERWRITER:                    Donaldson, Lufkin & Jenrette                                       1761 E. St. Andrew Place
RECORD DATE:                               October 31, 2000                                               Santa Ana, CA 92705
DISTRIBUTION DATE:                        November 27, 2000                     FACTOR INFORMATION:          (800) 735-7777
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
                                    Page 2 of 5 (C) COPYRIGHT 2000 Deutsche Bank



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

                         STATEMENT TO CERTIFICATEHOLDERS

<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   3,501,849.59     19,288.90     10,265.27      29,554.17          0.00          0.00   3,491,584.32
     B-1         2,231,794.00   2,069,274.80     11,397.98      6,065.84      17,463.82          0.00          0.00   2,063,208.96
     B-2         1,201,735.00   1,114,224.73      6,137.38      3,266.22       9,403.60          0.00          0.00   1,110,958.51
     B-3         1,030,060.00     955,051.04      5,260.61      2,799.62       8,060.23          0.00          0.00     952,251.42
     B-4           515,029.00     477,524.60      2,630.30      1,399.81       4,030.11          0.00          0.00     476,124.79
     B-5           686,706.32     636,700.37      3,507.07      1,866.42       5,373.49          0.00          0.00     634,833.95
     R-II               50.00           0.00          0.00          0.00           0.00          0.00          0.00           0.00



------------------------------------------------------------------------------------------------------------------------------------
TOTALS           9,442,256.32   8,754,625.13     48,222.24     25,663.18      73,885.42          0.00          0.00   8,728,961.95
------------------------------------------------------------------------------------------------------------------------------------
</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         927.180036      5.107096      2.717922       7.825018    924.462115     6.609843%      6.610054%
     B-1        055240DK8         927.180018      5.107093      2.717921       7.825014    924.462096     6.609843%      6.610054%
     B-2        055240DL6         927.180060      5.107099      2.717920       7.825020    924.462140     6.609843%      6.610054%
     B-3        055240DM4         927.180009      5.107091      2.717919       7.825010    924.462090     6.609843%      6.610054%
     B-4        055240DN2         927.180023      5.107091      2.717925       7.825016    924.462098     6.609843%      6.610054%
     B-5        055240DP7         927.180006      5.107089      2.717930       7.825019    924.462076     6.609843%      6.610054%
     R-II       055240DR3           0.000000      0.000000      0.000000       0.000000      0.000000     6.750000%      6.750000%



------------------------------------------------------------------------------------------------------------------------------------
SELLER:                                    Bank of America                      ADMINISTRATOR:              Barbara Campbell
SERVICER:                                  Bank of America                                                   Deutsche Bank
LEAD UNDERWRITER:                    Donaldson, Lufkin & Jenrette                                       1761 E. St. Andrew Place
RECORD DATE:                               October 31, 2000                                               Santa Ana, CA 92705
DISTRIBUTION DATE:                        November 27, 2000                     FACTOR INFORMATION:          (800) 735-7777
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
                                    Page 3 of 5 (C) COPYRIGHT 2000 Deutsche Bank


<PAGE>


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

                         STATEMENT TO CERTIFICATEHOLDERS


<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
Distribution Date:            November 27, 2000
------------------------------------------------------------------------------------------------------------------------------------


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

<S>                                                                       <C>                         <C>
                BEGINNING BALANCE OF POOL                                 91,717,690.71               119,809,146.26
                LESS:         SCHEDULED PRINCIPAL                            (92,795.71)                (531,442.92)
                              PRINCIPAL PREPAYMENTS                       (1,351,649.39)              (1,089,353.25)
                              REPURCHASES                                          0.00                        0.00
                              LIQUIDATIONS                                         0.00                        0.00
                              OTHER UNSCHEDULED PRINCIPAL                          0.00                        0.00
                                                                          -------------               --------------
                ENDING BALANCE OF POOL                                    90,273,245.61               118,188,350.09
                                                                          =============               ==============

                BEGINNING NUMBER OF LOANS IN POOL                                   292                         388
                ENDING NUMBER OF LOANS IN POOL                                      288                         384

                WEIGHTED AVERAGE REMAINING TERM TO MATURITY                         316                         143
                WEIGHTED AVERAGE NET CONTRACT RATE                            7.513184%                   7.068499%

                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                   90,539,399.89               109,928,721.10
                STRIPPED INTEREST RATE                                        0.520487%                   0.217860%
</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    493,634.76           0.00          0.00          0.00           0.00
                     PERCENTAGE OF GROUP BAL.      0.0000%       0.2368%        0.0000%       0.0000%       0.0000%        0.0000%
                NUMBER OF LOANS                          0             2              0             0             0              0
                     PERCENTAGE OF LOANS           0.0000%       0.2976%        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          19,107.85                   38,367.04
                PLUS:         ADDITIONAL SERVICING COMPENSATION                    0.00                        0.00
                LESS:         AMTS. TO COVER PREPAYMENT INT. SHORTFALL        (2,814.61)                  (1,481.74)
                              DELINQUENT SERVICING FEES                       (1,280.20)                   3,359.03
                                                                          -------------               --------------
                SERVICING FEES COLLECTED FOR THE CURRENT DUE PERIOD           15,013.04                   40,244.33
                                                                          =============               ==============

                ADVANCED PRINCIPAL                                             5,853.99                   41,904.29
                ADVANCED INTEREST                                             37,006.51                   53,372.32
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
                                    Page 4 of 5 (C) COPYRIGHT 2000 Deutsche Bank


<PAGE>


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

                         STATEMENT TO CERTIFICATEHOLDERS

<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
Distribution Date:            November 27, 2000
------------------------------------------------------------------------------------------------------------------------------------

                                                 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               1,351,641.20          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                       8.19          0.00                         0.00          0.00                         0.00
       CLASS IIA-1                677,787.27          0.00                         0.00          0.00                         0.00
       CLASS IIA-2                  7,400.21          0.00                         0.00          0.00                         0.00
       CLASS IIA-3                      0.00          0.00                         0.00          0.00                         0.00
       CLASS IIA-4                 40,277.63          0.00                         0.00          0.00                         0.00
       CLASS IIA-5                359,459.74          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                  4,428.40          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                      2,441,002.64          0.00                         0.00          0.00                         0.00
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>

<TABLE>
<CAPTION>

<S>                                                                                                          <C>
                OTHER REPORTING ITEMS:

                GROUP I PERCENTAGE                                                                           95.81%
                GROUP I PREPAYMENT PERCENTAGE                                                               100.00%
                GROUP II PERCENTAGE                                                                          95.89%
                GROUP II PREPAYMENT PERCENTAGE                                                              100.00%

                SUBORDINATE PRINCIPAL DISTRIBUTION AMOUNT                                                 25,663.18
                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 2000 Deutsche Bank


<PAGE>

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


<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      21,105.08          0.00         20.68          20.68          0.00          0.00      21,084.41
     P2-M          350,133.00     323,936.54          0.00     10,589.62      10,589.62          0.00          0.00     313,346.92
     X1-M *    142,084,361.67  93,835,252.08     40,698.38          0.00      40,698.38          0.00          0.00  93,728,339.00
     X2-M *    187,559,494.52 124,404,091.04     22,799.49          0.00      22,799.49          0.00          0.00 121,558,387.53
     Y1             71,698.81      47,382.63        266.51          0.00         266.51          0.00          0.00      47,382.63
     Y2             99,676.65      62,419.81        338.11        185.01         523.12          0.00          0.00      62,234.80
     Z1        143,556,266.44  95,299,498.25    536,059.68    108,393.66     644,453.34          0.00          0.00  95,191,104.59
     Z2        199,253,620.42 135,243,178.89    732,567.22  3,122,175.86   3,854,743.08          0.00          0.00 132,121,003.03
     R-I                50.00           0.00          0.00          0.00           0.00          0.00          0.00           0.00

------------------------------------------------------------------------------------------------------------------------------------
TOTALS         343,352,946.32 230,997,521.20  1,332,729.39  3,241,364.82   4,574,094.22          0.00          0.00 227,756,156.38
------------------------------------------------------------------------------------------------------------------------------------
*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                         981.585973      0.000000      0.961583       0.961583    980.624622     0.000000%      0.000000%
     P2-M                         925.181402      0.000000     30.244564      30.244564    894.936838     0.000000%      0.000000%
     X1-M *                       660.419282      0.286438      0.000000       0.286438    659.666820     0.520466%      0.520466%
     X2-M *                       663.278025      0.121559      0.000000       0.121559    648.105754     0.219924%      0.219924%
     Y1                           660.856552      3.717105      0.000000       3.717105    660.856552     6.750000%      6.750000%
     Y2                           626.223001      3.392068      1.856108       5.248176    624.366900     6.500000%      6.500000%
     Z1                           663.847707      3.734143      0.755060       4.489204    663.092646     6.750000%      6.750000%
     Z2                           678.748916      3.676557     15.669356      19.345912    663.079560     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:               Kelly L. Shea
SERVICER:                                  Bank of America                                                   Deutsche Bank
LEAD UNDERWRITER:                    Donaldson, Lufkin & Jenrette                                       1761 E. St. Andrew Place
RECORD DATE:                              December 31, 1999                                               Santa Ana, CA 92705
DISTRIBUTION DATE:                         January 25, 2000                     FACTOR INFORMATION:          (800) 735-7777
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>

                                    Page 1 of 5 (C) COPYRIGHT 2000 Deutsche Bank


<PAGE>


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

                         STATEMENT TO CERTIFICATEHOLDERS


<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  47,886,388.92    269,360.94    104,714.64     374,075.58          0.00          0.00  47,781,674.28
     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   7,235,267.53     40,698.36          0.00      40,698.36          0.00          0.00   7,227,064.30
     I-PO           21,501.00      21,105.08          0.00         20.67          20.67          0.00          0.00      21,084.41
     IIA-1     121,111,453.00  81,332,821.63    440,552.78  1,938,144.56   2,378,697.34          0.00          0.00  79,394,677.07
     IIA-2       1,000,000.00     538,528.99      2,917.03     22,388.79      25,305.82          0.00          0.00     516,140.20
     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  13,896,346.80     75,271.88     54,309.74     129,581.62          0.00          0.00  13,842,037.06
     IIA-5      46,447,250.00  26,158,641.54    141,692.64  1,087,518.49   1,229,211.13          0.00          0.00  25,071,123.05
     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   4,209,136.05     22,799.49          0.00      22,799.49          0.00          0.00   4,134,143.14
     II-PO         350,133.00     323,936.54          0.00     10,589.62      10,589.62          0.00          0.00     313,346.92


------------------------------------------------------------------------------------------------------------------------------------
TOTALS         333,910,590.00 221,995,769.50  1,283,160.63  3,217,686.51   4,500,847.14          0.00          0.00 218,778,082.99
------------------------------------------------------------------------------------------------------------------------------------
  *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         498.289693      2.802880      1.089625       3.892505    497.200068     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         603.758614      5.624997      0.000000       5.624997    603.074081     6.750000%      0.000000%
     I-PO       055240DH5         981.585973      0.000000      0.961351       0.961351    980.624622     0.000000%      6.500000%
     IIA-1      055240CZ6         671.553512      3.637581     16.002983      19.640565    655.550529     6.500000%      6.500000%
     IIA-2      055240DA0         538.528990      2.917030     22.388790      25.305820    516.140200     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         931.780922      5.047147      3.641588       8.688735    928.139334     6.500000%      6.500000%
     IIA-5      055240DD4         563.190319      3.050614     23.414056      26.464670    539.776263     6.500000%      6.500000%
     IIA-6      055240DE2           0.000000      0.000000      0.000000       0.000000      0.000000     6.500000%      6.500000%
     II-X *     055240DG7         560.209157      3.034467      0.000000       3.034467    550.228079     6.500000%      0.000000%
     II-PO      055240DU6         925.181402      0.000000     30.244564      30.244564    894.936838     0.000000%      0.000000%



------------------------------------------------------------------------------------------------------------------------------------
SELLER:                                    Bank of America                      ADMINISTRATOR:               Kelly L. Shea
SERVICER:                                  Bank of America                                                   Deutsche Bank
LEAD UNDERWRITER:                    Donaldson, Lufkin & Jenrette                                       1761 E. St. Andrew Place
RECORD DATE:                              December 31, 1999                                               Santa Ana, CA 92705
DISTRIBUTION DATE:                         January 25, 2000                     FACTOR INFORMATION:          (800) 735-7777
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
                                    Page 2 of 5 (C) COPYRIGHT 2000 Deutsche Bank


<PAGE>


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

                         STATEMENT TO CERTIFICATEHOLDERS


<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   3,600,700.20     19,827.50      9,471.32      29,298.82          0.00          0.00   3,591,228.88
     B-1         2,231,794.00   2,127,686.55     11,716.25      5,596.69      17,312.94          0.00          0.00   2,122,089.86
     B-2         1,201,735.00   1,145,677.17      6,308.75      3,013.60       9,322.35          0.00          0.00   1,142,663.57
     B-3         1,030,060.00     982,010.34      5,407.51      2,583.09       7,990.60          0.00          0.00     979,427.25
     B-4           515,029.00     491,004.21      2,703.75      1,291.54       3,995.29          0.00          0.00     489,712.67
     B-5           686,706.32     654,673.23      3,605.00      1,722.07       5,327.07          0.00          0.00     652,951.16
     R-II               50.00           0.00          0.00          0.00           0.00          0.00          0.00           0.00


------------------------------------------------------------------------------------------------------------------------------------
TOTALS           9,442,256.32   9,001,751.70     49,568.76     23,678.31      73,247.07          0.00          0.00   8,978,073.39
------------------------------------------------------------------------------------------------------------------------------------
</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         953.352580      5.249701      2.507709       7.757409    950.844872     6.607882%      6.608064%
     B-1        055240DK8         953.352572      5.249700      2.507709       7.757410    950.844863     6.607882%      6.608064%
     B-2        055240DL6         953.352586      5.249701      2.507708       7.757409    950.844878     6.607882%      6.608064%
     B-3        055240DM4         953.352562      5.249704      2.507708       7.757412    950.844854     6.607882%      6.608064%
     B-4        055240DN2         953.352549      5.249704      2.507703       7.757408    950.844846     6.607882%      6.608064%
     B-5        055240DP7         953.352560      5.249697      2.507724       7.757421    950.844836     6.607882%      6.608064%
     R-II       055240DR3           0.000000      0.000000      0.000000       0.000000      0.000000     6.750000%      6.750000%


------------------------------------------------------------------------------------------------------------------------------------
SELLER:                                    Bank of America                      ADMINISTRATOR:               Kelly L. Shea
SERVICER:                                  Bank of America                                                   Deutsche Bank
LEAD UNDERWRITER:                    Donaldson, Lufkin & Jenrette                                       1761 E. St. Andrew Place
RECORD DATE:                              December 31, 1999                                               Santa Ana, CA 92705
DISTRIBUTION DATE:                         January 25, 2000                     FACTOR INFORMATION:          (800) 735-7777
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
                                    Page 3 of 5 (C) COPYRIGHT 2000 Deutsche Bank


<PAGE>


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

                         STATEMENT TO CERTIFICATEHOLDERS
<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
Distribution Date:            January 25, 2000
------------------------------------------------------------------------------------------------------------------------------------


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

<S>                                                                       <C>                         <C>
                BEGINNING BALANCE OF POOL                                 95,367,986.00               135,629,535.48
                LESS:         SCHEDULED PRINCIPAL                            (90,324.22)                (530,071.30)
                              PRINCIPAL PREPAYMENTS                          (18,090.11)              (2,602,879.19)
                              REPURCHASES                                          0.00                        0.00
                              LIQUIDATIONS                                         0.00                        0.00
                              OTHER UNSCHEDULED PRINCIPAL                          0.00                        0.00
                                                                          -------------               --------------
                ENDING BALANCE OF POOL                                    95,259,571.67               132,496,584.99
                                                                          =============               ==============

                BEGINNING NUMBER OF LOANS IN POOL                                   301                         422
                ENDING NUMBER OF LOANS IN POOL                                      301                         413

                WEIGHTED AVERAGE REMAINING TERM TO MATURITY                         328                         154
                WEIGHTED AVERAGE NET CONTRACT RATE                            7.510607%                   7.073031%

                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                   93,835,252.08               124,404,091.04
                STRIPPED INTEREST RATE                                        0.520466%                   0.219924%
</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          19,868.33                   43,721.82
                PLUS:         ADDITIONAL SERVICING COMPENSATION                    0.00                        0.00
                LESS:         AMTS. TO COVER PREPAYMENT INT. SHORTFALL             0.00                   (4,145.93)
                              DELINQUENT SERVICING FEES                       (1,512.65)                   2,901.65
                                                                          -------------               --------------
                SERVICING FEES COLLECTED FOR THE CURRENT DUE PERIOD           18,355.68                   42,477.54
                                                                          =============               ==============

                ADVANCED PRINCIPAL                                             6,423.71                   34,473.48
                ADVANCED INTEREST                                             43,696.70                   50,246.62
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>

                                    Page 4 of 5 (C) COPYRIGHT 2000 Deutsche Bank


<PAGE>


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

                         STATEMENT TO CERTIFICATEHOLDERS

<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
Distribution Date:            January 25, 2000
------------------------------------------------------------------------------------------------------------------------------------

                                                 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                  18,086.54          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                       3.57          0.00                         0.00          0.00                         0.00
       CLASS IIA-1              1,620,570.26          0.00                         0.00          0.00                         0.00
       CLASS IIA-2                 18,720.28          0.00                         0.00          0.00                         0.00
       CLASS IIA-3                      0.00          0.00                         0.00          0.00                         0.00
       CLASS IIA-4                 45,410.82          0.00                         0.00          0.00                         0.00
       CLASS IIA-5                909,323.36          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                  8,854.46          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                      2,620,969.30          0.00                         0.00          0.00                         0.00
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>

<TABLE>
<CAPTION>

<S>                                                                                                          <C>
                OTHER REPORTING ITEMS:

                GROUP I PERCENTAGE                                                                           95.93%
                GROUP I PREPAYMENT PERCENTAGE                                                               100.00%
                GROUP II PERCENTAGE                                                                          96.22%
                GROUP II PREPAYMENT PERCENTAGE                                                              100.00%

                SUBORDINATE PRINCIPAL DISTRIBUTION AMOUNT                                                 23,678.31
                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 2000 Deutsche Bank