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<PAGE> PAGE 2
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SIGNATURE J. KEVIN KENELY
TITLE V.P. FUND ADMIN
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM ACCOUNTING
RECORDS AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH ACCOUNTING
RECORDS.
</LEGEND>
<SERIES>
<NUMBER> 101
<NAME> STRATEGIC INCOME FUND CLASS A
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> APR-30-1998
<PERIOD-START> MAY-01-1997
<PERIOD-END> OCT-31-1997
<INVESTMENTS-AT-COST> 209,130,412
<INVESTMENTS-AT-VALUE> 206,152,230
<RECEIVABLES> 4,186,789
<ASSETS-OTHER> 856,435
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 211,195,454
<PAYABLE-FOR-SECURITIES> 2,353,194
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 2,188,284
<TOTAL-LIABILITIES> 4,541,478
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 102,903,175
<SHARES-COMMON-STOCK> 9,165,147
<SHARES-COMMON-PRIOR> 8,613,751
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> (474,236)
<ACCUMULATED-NET-GAINS> 0
<OVERDISTRIBUTION-GAINS> (37,528,069)
<ACCUM-APPREC-OR-DEPREC> (217,934)
<NET-ASSETS> 64,682,936
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 2,626,021
<OTHER-INCOME> 32,601
<EXPENSES-NET> (414,305)
<NET-INVESTMENT-INCOME> 2,244,317
<REALIZED-GAINS-CURRENT> 1,575,143
<APPREC-INCREASE-CURRENT> 420,510
<NET-CHANGE-FROM-OPS> 4,239,970
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (2,242,865)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 1,813,399
<NUMBER-OF-SHARES-REDEEMED> (1,432,679)
<SHARES-REINVESTED> 170,677
<NET-CHANGE-IN-ASSETS> 5,957,860
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> (475,689)
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> (202,503)
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> (414,305)
<AVERAGE-NET-ASSETS> 0
<PER-SHARE-NAV-BEGIN> 6.82
<PER-SHARE-NII> 0.25
<PER-SHARE-GAIN-APPREC> 0.24
<PER-SHARE-DIVIDEND> (0.25)
<PER-SHARE-DISTRIBUTIONS> 0
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<PER-SHARE-NAV-END> 7.06
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<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM ACCOUNTING
RECORDS AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH ACCOUNTING
RECORDS.
</LEGEND>
<SERIES>
<NUMBER> 102
<NAME> STRATEGIC INCOME FUND CLASS B
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> APR-30-1998
<PERIOD-START> MAY-01-1997
<PERIOD-END> OCT-31-1997
<INVESTMENTS-AT-COST> 209,130,412
<INVESTMENTS-AT-VALUE> 206,152,230
<RECEIVABLES> 4,186,789
<ASSETS-OTHER> 856,435
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 211,195,454
<PAYABLE-FOR-SECURITIES> 2,353,194
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 2,188,284
<TOTAL-LIABILITIES> 4,541,478
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 136,849,590
<SHARES-COMMON-STOCK> 16,652,601
<SHARES-COMMON-PRIOR> 16,071,930
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> (24,129)
<ACCUMULATED-NET-GAINS> 0
<OVERDISTRIBUTION-GAINS> (16,331,133)
<ACCUM-APPREC-OR-DEPREC> (2,421,885)
<NET-ASSETS> 118,072,443
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 4,839,650
<OTHER-INCOME> 58,480
<EXPENSES-NET> (1,208,898)
<NET-INVESTMENT-INCOME> 3,689,232
<REALIZED-GAINS-CURRENT> 2,856,502
<APPREC-INCREASE-CURRENT> 986,160
<NET-CHANGE-FROM-OPS> 7,531,894
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (3,685,302)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 3,102,943
<NUMBER-OF-SHARES-REDEEMED> (2,794,421)
<SHARES-REINVESTED> 272,149
<NET-CHANGE-IN-ASSETS> 7,990,772
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> (28,059)
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> (373,240)
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> (1,208,898)
<AVERAGE-NET-ASSETS> 0
<PER-SHARE-NAV-BEGIN> 6.85
<PER-SHARE-NII> 0.23
<PER-SHARE-GAIN-APPREC> 0.24
<PER-SHARE-DIVIDEND> (0.23)
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 7.09
<EXPENSE-RATIO> 2.08
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM ACCOUNTING
RECORDS AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH ACCOUNTING
RECORDS.
</LEGEND>
<SERIES>
<NUMBER> 103
<NAME> STRATEGIC INCOME FUND CLASS C
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> APR-30-1998
<PERIOD-START> MAY-01-1997
<PERIOD-END> OCT-31-1997
<INVESTMENTS-AT-COST> 209,130,412
<INVESTMENTS-AT-VALUE> 206,152,230
<RECEIVABLES> 4,186,789
<ASSETS-OTHER> 856,435
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 211,195,454
<PAYABLE-FOR-SECURITIES> 2,353,194
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 2,188,284
<TOTAL-LIABILITIES> 4,541,478
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 29,823,009
<SHARES-COMMON-STOCK> 3,200,001
<SHARES-COMMON-PRIOR> 3,552,632
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> (71,945)
<ACCUMULATED-NET-GAINS> 0
<OVERDISTRIBUTION-GAINS> (5,978,187)
<ACCUM-APPREC-OR-DEPREC> (1,111,454)
<NET-ASSETS> 22,661,423
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 982,268
<OTHER-INCOME> 11,916
<EXPENSES-NET> (245,198)
<NET-INVESTMENT-INCOME> 748,986
<REALIZED-GAINS-CURRENT> 566,744
<APPREC-INCREASE-CURRENT> 244,906
<NET-CHANGE-FROM-OPS> 1,560,636
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (748,280)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 300,386
<NUMBER-OF-SHARES-REDEEMED> (720,735)
<SHARES-REINVESTED> 67,719
<NET-CHANGE-IN-ASSETS> (1,642,174)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> (72,650)
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> (75,746)
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> (245,198)
<AVERAGE-NET-ASSETS> 0
<PER-SHARE-NAV-BEGIN> 6.84
<PER-SHARE-NII> 0.23
<PER-SHARE-GAIN-APPREC> 0.24
<PER-SHARE-DIVIDEND> (0.23)
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 7.08
<EXPENSE-RATIO> 2.08
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM ACCOUNTING
RECORDS AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH ACCOUNTING
RECORDS.
</LEGEND>
<SERIES>
<NUMBER> 401
<NAME> KEYSTONE STRATEGIC INCOME FUND CLASS Y
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> APR-30-1998
<PERIOD-START> MAY-01-1997
<PERIOD-END> OCT-31-1997
<INVESTMENTS-AT-COST> 209,130,412
<INVESTMENTS-AT-VALUE> 206,152,230
<RECEIVABLES> 4,186,789
<ASSETS-OTHER> 856,435
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 211,195,454
<PAYABLE-FOR-SECURITIES> 2,353,194
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 2,188,284
<TOTAL-LIABILITIES> 4,541,478
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 1,245,183
<SHARES-COMMON-STOCK> 179,674
<SHARES-COMMON-PRIOR> 1
<ACCUMULATED-NII-CURRENT> 6
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 0
<OVERDISTRIBUTION-GAINS> 9,857
<ACCUM-APPREC-OR-DEPREC> (17,872)
<NET-ASSETS> 1,237,174
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 13,837
<OTHER-INCOME> 128
<EXPENSES-NET> (1,845)
<NET-INVESTMENT-INCOME> 12,120
<REALIZED-GAINS-CURRENT> 9,857
<APPREC-INCREASE-CURRENT> (17,872)
<NET-CHANGE-FROM-OPS> 4,105
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (12,114)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 180,020
<NUMBER-OF-SHARES-REDEEMED> (1,670)
<SHARES-REINVESTED> 1,324
<NET-CHANGE-IN-ASSETS> 1,237,167
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> (1,080)
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<AVERAGE-NET-ASSETS> 0
<PER-SHARE-NAV-BEGIN> 6.65
<PER-SHARE-NII> 0.25
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</TABLE>
