WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.

<TABLE> <S> <C>

<ARTICLE>         6
<LEGEND>
This schedule contains summary financial information extracted from the
Statement of Assets and Liabilities, the Statement of Operations, the Statement
of Changes in Net Assets and the Per Unit Data and Ratios contained in the
financial statements of the fund to which this schedule relates and is qualified
in its entirety by reference to such financial statements.
</LEGEND>
<CIK>   0000878375
<NAME>   ABA MEMBERS/STATE STREET COLLECTIVE TRUST
<SERIES>
   <NUMBER> 0
   <NAME>   STRUCTURED PORTFOLIO SERVICE - CONSERVATIVE FUND
       
<S>                                            <C>
<PERIOD-TYPE>                                  3-MOS
<FISCAL-YEAR-END>                              DEC-31-1998
<PERIOD-START>                                 JAN-1-1998
<PERIOD-END>                                   MAR-31-1998
<INVESTMENTS-AT-COST>                                               18,472,204
<INVESTMENTS-AT-VALUE>                                              20,692,869
<RECEIVABLES>                                                          196,491
<ASSETS-OTHER>                                                               0
<OTHER-ITEMS-ASSETS>                                                         0
<TOTAL-ASSETS>                                                      20,889,360
<PAYABLE-FOR-SECURITIES>                                               196,491
<SENIOR-LONG-TERM-DEBT>                                                      0
<OTHER-ITEMS-LIABILITIES>                                                2,699
<TOTAL-LIABILITIES>                                                    199,190
<SENIOR-EQUITY>                                                              0
<PAID-IN-CAPITAL-COMMON>                                                     0
<SHARES-COMMON-STOCK>                                                        0
<SHARES-COMMON-PRIOR>                                                        0
<ACCUMULATED-NII-CURRENT>                                                    0
<OVERDISTRIBUTION-NII>                                                       0
<ACCUMULATED-NET-GAINS>                                                      0
<OVERDISTRIBUTION-GAINS>                                                     0
<ACCUM-APPREC-OR-DEPREC>                                                     0
<NET-ASSETS>                                                        20,690,170
<DIVIDEND-INCOME>                                                            0
<INTEREST-INCOME>                                                            0
<OTHER-INCOME>                                                               0
<EXPENSES-NET>                                                           3,966
<NET-INVESTMENT-INCOME>                                                (3,966)
<REALIZED-GAINS-CURRENT>                                               475,095
<APPREC-INCREASE-CURRENT>                                              545,887
<NET-CHANGE-FROM-OPS>                                                1,017,016
<EQUALIZATION>                                                               0
<DISTRIBUTIONS-OF-INCOME>                                                    0
<DISTRIBUTIONS-OF-GAINS>                                                     0
<DISTRIBUTIONS-OTHER>                                                        0
<NUMBER-OF-SHARES-SOLD>                                                295,848
<NUMBER-OF-SHARES-REDEEMED>                                          (110,664)
<SHARES-REINVESTED>                                                          0
<NET-CHANGE-IN-ASSETS>                                               3,462,352
<ACCUMULATED-NII-PRIOR>                                                      0
<ACCUMULATED-GAINS-PRIOR>                                                    0
<OVERDISTRIB-NII-PRIOR>                                                      0
<OVERDIST-NET-GAINS-PRIOR>                                                   0
<GROSS-ADVISORY-FEES>                                                        0
<INTEREST-EXPENSE>                                                           0
<GROSS-EXPENSE>                                                              0
<AVERAGE-NET-ASSETS>                                                18,958,387
<PER-SHARE-NAV-BEGIN>                                                    12.97
<PER-SHARE-NII>                                                           0.00
<PER-SHARE-GAIN-APPREC>                                                   0.70
<PER-SHARE-DIVIDEND>                                                         0
<PER-SHARE-DISTRIBUTIONS>                                                    0
<RETURNS-OF-CAPITAL>                                                         0
<PER-SHARE-NAV-END>                                                      13.67
<EXPENSE-RATIO>                                                           0.08
<AVG-DEBT-OUTSTANDING>                                                       0
<AVG-DEBT-PER-SHARE>                                                         0
        

</TABLE>