<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
STATEMENT OF ASSETS AND LIABILITIES, STATEMENT OF OPERATIONS AND STATE-
MENT OF CHANGES IN NET ASSETS FOUND ON PAGES 108 THROUGH 134 OF THE FORTIS
SERIES FUND, INC. SEMI-ANNUAL SHAREHOLDER REPORT.
</LEGEND>
<CIK> 0000790558
<NAME> FORTIS SERIES FUND, INC.
<SERIES>
<NUMBER> 15
<NAME> BLUE CHIP STOCK SERIES
<MULTIPLIER> 1
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> DEC-31-2000
<PERIOD-START> JAN-01-2000
<PERIOD-END> JUN-30-2000
<INVESTMENTS-AT-COST> 220,996,693
<INVESTMENTS-AT-VALUE> 305,415,570
<RECEIVABLES> 1,311,470
<ASSETS-OTHER> 43,261,120<F1>
<OTHER-ITEMS-ASSETS> 15,550
<TOTAL-ASSETS> 350,003,710
<PAYABLE-FOR-SECURITIES> 71,855
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 43,496,642<F1>
<TOTAL-LIABILITIES> 43,568,497
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 205,295,137
<SHARES-COMMON-STOCK> 13,061,642
<SHARES-COMMON-PRIOR> 12,958,021
<ACCUMULATED-NII-CURRENT> (133,037)
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 16,854,239
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 84,418,874
<NET-ASSETS> 306,435,213
<DIVIDEND-INCOME> 993,171
<INTEREST-INCOME> 167,904
<OTHER-INCOME> 16,734<F2>
<EXPENSES-NET> (1,318,034)
<NET-INVESTMENT-INCOME> (140,225)
<REALIZED-GAINS-CURRENT> 11,940,274
<APPREC-INCREASE-CURRENT> 7,478,293
<NET-CHANGE-FROM-OPS> 19,278,342
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 1,021,562
<NUMBER-OF-SHARES-REDEEMED> (917,941)
<SHARES-REINVESTED> 0
<NET-CHANGE-IN-ASSETS> 22,205,944
<ACCUMULATED-NII-PRIOR> 10,313
<ACCUMULATED-GAINS-PRIOR> 4,910,840
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 1,249,110
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 1,318,034
<AVERAGE-NET-ASSETS> 291,121,405
<PER-SHARE-NAV-BEGIN> 21.93
<PER-SHARE-NII> (0.01)
<PER-SHARE-GAIN-APPREC> 1.54
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 23.46
<EXPENSE-RATIO> 0.92<F3>
<FN>
<F1>SECURITIES VALUED AT $43,055,745 WERE ON LOAN TO BROKERS FROM THE
PORTFOLIO. FOR COLLATERAL, THE PORTFOLIO'S CUSTODIAN RECEIVED $43,261,120
IN CASH.
<F2>SECURITY LENDING INCOME THROUGH JUNE 30, 2000.
<F3>ANNUALIZED.
</FN>
</TABLE>
