<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
This schedule contains summary financial information extracted from the
"Semi-Annual Report to Shareholders" dated June 30, 2000 and is qualified in its
entirety by reference to such financial statements.
</LEGEND>
<CIK> 0000856943
<NAME> Separate Account D - Guardian Investor
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> DEC-31-1999
<PERIOD-END> JUN-30-2000
<INVESTMENTS-AT-COST> 3,796,969,841
<INVESTMENTS-AT-VALUE> 4,975,629,984
<RECEIVABLES> 0
<ASSETS-OTHER> 0
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 4,975,629,984
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 31,885,249
<TOTAL-LIABILITIES> 31,885,249
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 0
<SHARES-COMMON-STOCK> 0
<SHARES-COMMON-PRIOR> 0
<ACCUMULATED-NII-CURRENT> (25,351,442)
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 155,760,572
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 1,178,660,144
<NET-ASSETS> 4,943,744,735
<DIVIDEND-INCOME> 6,077,487
<INTEREST-INCOME> 0
<OTHER-INCOME> 0
<EXPENSES-NET> 31,428,930
<NET-INVESTMENT-INCOME> (25,351,442)
<REALIZED-GAINS-CURRENT> 155,760,572
<APPREC-INCREASE-CURRENT> 25,419,175
<NET-CHANGE-FROM-OPS> 104,989,954
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 0
<NUMBER-OF-SHARES-REDEEMED> 0
<SHARES-REINVESTED> 0
<NET-CHANGE-IN-ASSETS> 0
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 31,428,930
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 31,428,930
<AVERAGE-NET-ASSETS> 5,056,327,249
<PER-SHARE-NAV-BEGIN> 0
<PER-SHARE-NII> 0
<PER-SHARE-GAIN-APPREC> 130,341,396
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 0
<EXPENSE-RATIO> .007
</TABLE>
