Payment Date: 05/25/00
------------------------------------------------------------
BA MORTGAGE SECURITIES, INC.
Mortgage Pass-Through Certificates, Series 1998-6
BANK OF AMERICA, FSB, MASTER SERVICER
------------------------------------------------------------
<TABLE>
<CAPTION>
Class Information Current Payment Information
----------------------------------------------------------------------------------------------------------------------------------
Beginning Pass Thru Principal Interest Total Principal Interest
Type Class Code Name Cert. Bal. Rate Dist. Amt. Dist. Amt. Dist. Losses Shortfalls
----------------------------------------------------------------------------------------------------------------------------------
<S> <C> <C> <C> <C> <C> <C> <C> <C> <C>
Senior A-1 86,262,992.04 6.250000% 466,731.65 449,286.42 916,018.06 0.00 0.00
A-2 142,023,276.39 6.250000% 647,110.47 739,704.56 1,386,815.03 0.00 0.00
A-3 3,780,005.00 7.000000% 0.00 22,050.03 22,050.03 0.00 0.00
A-4 38,457,652.00 6.250000% 0.00 200,300.27 200,300.27 0.00 0.00
A-5 9,871,494.00 6.750000% 0.00 55,527.15 55,527.15 0.00 0.00
A-6 2,381,997.00 0.000000% 0.00 0.00 0.00 0.00 0.00
A-7 4,560,673.00 6.500000% 0.00 24,703.65 24,703.65 0.00 0.00
A-8 16,140,592.81 6.250000% 90,433.12 84,065.59 174,498.71 0.00 0.00
A-9 8,374,013.57 6.500000% 38,155.10 45,359.24 83,514.34 0.00 0.00
A-10 334,960.94 0.000000% 1,526.21 0.00 1,526.21 0.00 0.00
A-11 3,780,006.00 6.500000% 0.00 20,475.03 20,475.03 0.00 0.00
A-12 4,839,027.00 7.000000% 0.00 28,227.66 28,227.66 0.00 0.00
A-13 179,224.00 0.000000% 0.00 0.00 0.00 0.00 0.00
A-14 2,244,655.00 6.250000% 0.00 11,690.91 11,690.91 0.00 0.00
A-15 3,093,004.00 6.500000% 0.00 16,753.77 16,753.77 0.00 0.00
A-16 2,328,283.00 7.000000% 0.00 13,581.65 13,581.65 0.00 0.00
A-17 179,099.00 0.000000% 0.00 0.00 0.00 0.00 0.00
A-18 1,893,933.00 6.950000% 0.00 10,969.03 10,969.03 0.00 0.00
A-19 350,729.00 5.670000% 0.00 1,657.19 1,657.19 0.00 0.00
Residual R 0.00 6.250000% 0.00 0.00 0.00 0.00 0.00
----------------------------------------------------------------------------------------------------------------------------------
Subordinate M 7,696,900.59 6.250000% 7,307.18 40,088.02 47,395.20 0.00 0.00
B-1 3,355,060.29 6.250000% 3,185.18 17,474.27 20,659.45 0.00 0.00
B-2 1,578,851.55 6.250000% 1,498.91 8,223.19 9,722.09 0.00 0.00
B-3 1,184,138.17 6.250000% 1,124.18 6,167.39 7,291.57 0.00 0.00
B-4 986,781.98 6.250000% 936.82 5,139.49 6,076.31 0.00 0.00
B-5 986,784.51 6.250000% 936.82 5,139.50 6,076.32 0.00 0.00
----------------------------------------------------------------------------------------------------------------------------------
----------------------------------------------------------------------------------------------------------------------------------
Totals - - 346,864,133.84 - 1,258,945.62 1,806,584.02 3,065,529.64 - -
----------------------------------------------------------------------------------------------------------------------------------
Class Information
--------------------------------------------------------------------------------
Ending Cert. Unpaid
Type Class Code Name Notional Bal. Interest
--------------------------------------------------------------------------------
Senior A-1 85,796,260.39 0.00
A-2 141,376,165.93 0.00
A-3 3,780,005.00 0.00
A-4 38,457,652.00 0.00
A-5 9,871,494.00 0.00
A-6 2,381,997.00 0.00
A-7 4,560,673.00 0.00
A-8 16,050,159.69 0.00
A-9 8,335,858.47 0.00
A-10 333,434.73 0.00
A-11 3,780,006.00 0.00
A-12 4,839,027.00 0.00
A-13 179,224.00 0.00
A-14 2,244,655.00 0.00
A-15 3,093,004.00 0.00
A-16 2,328,283.00 0.00
A-17 179,099.00 0.00
A-18 1,893,933.00 0.00
A-19 350,729.00 0.00
Residual R 0.00 0.00
--------------------------------------------------------------------------------
Subordinate M 7,689,593.41 0.00
B-1 3,351,875.11 0.00
B-2 1,577,352.64 0.00
B-3 1,183,013.99 0.00
B-4 985,845.16 0.00
B-5 985,847.69 0.00
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
Totals - - 345,605,188.22 -
--------------------------------------------------------------------------------
</TABLE>
<PAGE>
Payment Date: 05/25/00
------------------------------------------------------------
BA MORTGAGE SECURITIES, INC.
Mortgage Pass-Through Certificates, Series 1998-6
BANK OF AMERICA, FSB, MASTER SERVICER
------------------------------------------------------------
<TABLE>
<CAPTION>
Class Information Current Payment Information
Factors per $1,000
------------------------------------------------------------------------------------------------------------------------
Beginning Pass Thru CUSIP Principal Interest Ending Cert./
Type Class Code Name Cert. Bal.(Face) Rate Numbers Dist. Dist. Notional Bal.
------------------------------------------------------------------------------------------------------------------------
<S> <C> <C> <C> <C> <C> <C> <C> <C>
------------------------------------------------------------------------------------------------------------------------
Senior A-1 86,262,992.04 6.250000% 055240KN4 4.389197 4.225141 806.837787
A-2 142,023,276.39 6.250000% 055240KP9 3.809790 4.354927 832.336261
A-3 3,780,005.00 7.000000% 055240KQ7 0.000000 5.833333 1,000.000000
A-4 38,457,652.00 6.250000% 055240KR5 0.000000 5.208333 1,000.000000
A-5 9,871,494.00 6.750000% 055240KS3 0.000000 5.625000 1,000.000000
A-6 2,381,997.00 0.000000% 055240KT1 0.000000 0.000000 1,000.000000
A-7 4,560,673.00 6.500000% 055240KU8 0.000000 5.416667 1,000.000000
A-8 16,140,592.81 6.250000% 055240KV6 4.514884 4.196984 801.306025
A-9 8,374,013.57 6.500000% 055240KW4 3.809790 4.529124 832.336261
A-10 334,960.94 0.000000% 055240KX2 3.809790 0.000000 832.336250
A-11 3,780,006.00 6.500000% 055240KY0 0.000000 5.416667 1,000.000000
A-12 4,839,027.00 7.000000% 055240KZ7 0.000000 5.833333 1,000.000000
A-13 179,224.00 0.000000% 055240LA1 0.000000 0.000000 1,000.000000
A-14 2,244,655.00 6.250000% 055240LB9 0.000000 5.208333 1,000.000000
A-15 3,093,004.00 6.500000% 055240LC7 0.000000 5.416667 1,000.000000
A-16 2,328,283.00 7.000000% 055240LD5 0.000000 5.833333 1,000.000000
A-17 179,099.00 0.000000% 055240LE3 0.000000 0.000000 1,000.000000
A-18 1,893,933.00 6.950000% 055240LF0 0.000000 5.791667 1,000.000000
A-19 350,729.00 5.670000% 055240LG8 0.000000 4.725000 1,000.000000
Residual R 0.00 6.250000% 055240LL7 0.000000 0.000000 0.000000
------------------------------------------------------------------------------------------------------------------------
Subordinate M 7,696,900.59 6.250000% 055240LH6 0.935413 5.131787 984.367622
B-1 3,355,060.29 6.250000% 055240LJ2 0.935413 5.131787 984.367621
B-2 1,578,851.55 6.250000% 055240LK9 0.935413 5.131787 984.367621
B-3 1,184,138.17 6.250000% 055240LM5 0.935413 5.131787 984.367622
B-4 986,781.98 6.250000% 055240LN3 0.935413 5.131787 984.367627
B-5 986,784.51 6.250000% 055240LP8 0.935413 5.131787 984.367624
------------------------------------------------------------------------------------------------------------------------
------------------------------------------------------------------------------------------------------------------------
Totals - - 346,864,133.84 - - - - -
------------------------------------------------------------------------------------------------------------------------
------------------------------------------------------------------------------------------------------------------------
</TABLE>
<PAGE>
------------------------------------------------------------
BA MORTGAGE SECURITIES, INC.
Mortgage Pass-Through Certificates, Series 1998-6
BANK OF AMERICA, FSB, MASTER SERVICER
------------------------------------------------------------
--------------------------------------------------------------------------------
COLLATERAL INFORMATION
--------------------------------------------------------------------------------
Total
-----
Prin balance 345,605,195.07 345,605,195.07
Loan count 1047 1047
Avg loan rate 7.242786% 7.24
Prepay amount 929,640.22 929,640.22
--------------------------------------------------------------------------------
FEES AND ADVANCES
--------------------------------------------------------------------------------
Total
-----
Master serv fees 282,751.30 282,751.30
Sub servicer fees 0.00 0.00
Trustee fees 1,300.74 1,300.74
Agg advances N/A N/A
Adv this period 0.00 0.00
--------------------------------------------------------------------------------
LOSSES & INSURANCE COVERAGES
--------------------------------------------------------------------------------
Total
-----
Realized losses 0.00 0.00
Cumulative losses 0.00 0.00
Coverage Amounts Total
---------------- -----
Bankruptcy 100,000.00 100,000.00
Fraud 4,006,005.38 4,006,005.38
Special Hazard 4,163,923.89 4,163,923.89
Aggregate Certificate Information
-----------------------------------------------------------------------------
Class Aggregate Aggregate Aggregate
Type Percentage Prepay Pct. End Cert. Bal.
-----------------------------------------------------------------------------
Senior 95.452338% 100.000000% 331,075,616.75
-----------------------------------------------------------------------------
Junior 4.547662% 0.000000% 15,773,528.01
-----------------------------------------------------------------------------
--------------------------------------------------------------------------------
DELINQUENCY INFORMATION
--------------------------------------------------------------------------------
Period Loan Count Ending Stated Balance
------ ---------- ---------------------
30 to 59 days 3 1,090,244.54
60 to 89 days 0 0.00
90 or more 0 0.00
Foreclosure 0 0.00
Totals: 3 1,090,244.54
--------------------------------------------------------------------------------
<PAGE>
--------------------------------------------------------------------------------
REO INFORMATION
--------------------------------------------------------------------------------
REO Date Loan Number Ending Stated Balance Book Value
-------- ----------- --------------------- ----------
N/A # 0 N/A
N/A # 0 N/A
N/A # 0 N/A
N/A # 0 N/A
N/A # 0 N/A
N/A # 0 N/A
N/A # 0 N/A
N/A # 0 N/A
Totals: 0 N/A
Current Total Outstanding Balance: 0.00
Current Total Outstanding Number of Loans: 0
<PAGE>
--------------------------------------------------------------------------------
OTHER INFORMATION
--------------------------------------------------------------------------------
Amount/Withdrawal Total/Ending Bal.
----------------- -----------------
Available remittance amount 3,065,529.64 3,065,529.64
Principal remittance amount 1,258,945.62 1,258,945.62
Interest remittance amount 1,806,584.02 1,806,584.02
