<TABLE> <S> <C>
<ARTICLE> 6
<SERIES>
<NUMBER> 009
<NAME> EATON VANCE INSTITUTIONAL SHORT TERM TREASURY FUND
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> DEC-31-2000
<PERIOD-END> JUN-30-2000
<INVESTMENTS-AT-COST> 624,289,452
<INVESTMENTS-AT-VALUE> 624,314,409
<RECEIVABLES> 0
<ASSETS-OTHER> 0
<OTHER-ITEMS-ASSETS> 47,829
<TOTAL-ASSETS> 624,362,238
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 0
<TOTAL-LIABILITIES> 0
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 614,647,570
<SHARES-COMMON-STOCK> 8,616,906
<SHARES-COMMON-PRIOR> 0
<ACCUMULATED-NII-CURRENT> 9,521,333
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 168,378
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 24,957
<NET-ASSETS> 624,362,238
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 10,588,238
<OTHER-INCOME> 0
<EXPENSES-NET> 1,066,905
<NET-INVESTMENT-INCOME> 9,521,333
<REALIZED-GAINS-CURRENT> 168,378
<APPREC-INCREASE-CURRENT> 24,884
<NET-CHANGE-FROM-OPS> 9,714,595
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 11,974,003
<NUMBER-OF-SHARES-REDEEMED> 3,371,286
<SHARES-REINVESTED> 0
<NET-CHANGE-IN-ASSETS> 623,360,453
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 623,726
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 1,066,905
<AVERAGE-NET-ASSETS> 573,809,890
<PER-SHARE-NAV-BEGIN> 70.60
<PER-SHARE-NII> 1.82
<PER-SHARE-GAIN-APPREC> 0.04
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 72.46
<EXPENSE-RATIO> 0.60
</TABLE>
