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
   STRUCTURED PORTFOLIO SERVICE - CONSERVATIVE FUND
       
<S>                                                              <C>
<PERIOD-TYPE>                                                    9-MOS
<FISCAL-YEAR-END>                                                DEC-31-1998
<PERIOD-START>                                                   JAN-01-1998
<PERIOD-END>                                                     SEP-30-1998
<INVESTMENTS-AT-COST>                                             20,475,501
<INVESTMENTS-AT-VALUE>                                            21,505,575
<RECEIVABLES>                                                        225,361
<ASSETS-OTHER>                                                             0
<OTHER-ITEMS-ASSETS>                                                       0
<TOTAL-ASSETS>                                                    21,730,936
<PAYABLE-FOR-SECURITIES>                                             225,361
<SENIOR-LONG-TERM-DEBT>                                                    0
<OTHER-ITEMS-LIABILITIES>                                                  0
<TOTAL-LIABILITIES>                                                  226,806
<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>                                                      21,504,130
<DIVIDEND-INCOME>                                                          0
<INTEREST-INCOME>                                                          0
<OTHER-INCOME>                                                             0
<EXPENSES-NET>                                                        12,771
<NET-INVESTMENT-INCOME>                                              (12,771)
<REALIZED-GAINS-CURRENT>                                           1,693,931
<APPREC-INCREASE-CURRENT>                                           (644,704)
<NET-CHANGE-FROM-OPS>                                              1,036,456
<EQUALIZATION>                                                             0
<DISTRIBUTIONS-OF-INCOME>                                                  0
<DISTRIBUTIONS-OF-GAINS>                                                   0
<DISTRIBUTIONS-OTHER>                                                      0
<NUMBER-OF-SHARES-SOLD>                                              741,410
<NUMBER-OF-SHARES-REDEEMED>                                         (495,864)
<SHARES-REINVESTED>                                                        0
<NET-CHANGE-IN-ASSETS>                                             4,276,312
<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>                                              20,623,453
<PER-SHARE-NAV-BEGIN>                                                  12.97
<PER-SHARE-NII>                                                        (0.01)
<PER-SHARE-GAIN-APPREC>                                                 0.70
<PER-SHARE-DIVIDEND>                                                    0.00
<PER-SHARE-DISTRIBUTIONS>                                               0.00
<RETURNS-OF-CAPITAL>                                                       0
<PER-SHARE-NAV-END>                                                    13.66
<EXPENSE-RATIO>                                                         0.08
<AVG-DEBT-OUTSTANDING>                                                     0
<AVG-DEBT-PER-SHARE>                                                       0
        

</TABLE>