<PAGE>
000 A000000 12/31/97
000 C000000 0000932281
000 D000000 N
000 E000000 NF
000 F000000 Y
000 G000000 N
000 H000000 N
000 I000000 3.0.a
000 J000000 U
001 A000000 U.S. MONEY MARKET PORTFOLIO
001 B000000 811-8842
001 C000000 8099494719
002 A000000 BUTTERFIELD HOUSE, FORT STREET, BOX 2330
002 B000000 GEORGE TOWN
002 E010000 CAYMAN ISLANDS, BWI
003 000000 N
004 000000 N
005 000000 N
006 000000 N
007 A000000 N
007 B000000 0
007 C010100 1
007 C010200 2
007 C010300 3
007 C010400 4
007 C010500 5
007 C010600 6
007 C010700 7
007 C010800 8
007 C010900 9
007 C011000 10
018 000000 Y
019 A000000 Y
019 B000000 15
019 C000000 59 WALL ST
022 A000001 BANKERS TRUST
022 B000001 13-3039426
022 C000001 4109436
022 D000001 0
022 A000002 JP MORGAN
022 B000002 13-3224016
022 C000002 3616476
022 D000002 0
022 A000003 SALOMON BROS
022 B000003 13-3082694
022 C000003 3273000
022 D000003 0
022 A000004 CITIBANK
022 C000004 2773787
022 D000004 0
022 A000005 CS FIRST BOSTON
<PAGE>
022 B000005 13-5659485
022 C000005 1357000
022 D000005 0
022 A000006 SANWA BANK
022 B000006 13-3046258
022 C000006 320002
022 D000006 0
022 A000007 FIRST CHICAGO
022 C000007 158972
022 D000007 0
022 A000008 CIBC/WOODY GUNDY
022 B000008 36-0899825
022 C000008 155001
022 D000008 0
022 A000009 BANK OF MONTREAL
022 B000009 13-3112953
022 C000009 120000
022 D000009 0
022 A000010 CHASE
022 B000010 13-3112953
022 C000010 79084
022 D000010 0
023 C000000 16262903
023 D000000 31296
062 A000000 Y
062 B000000 8.9
062 C000000 13.6
062 D000000 8.7
062 E000000 0.0
062 F000000 26.1
062 G000000 23.5
062 H000000 0.0
062 I000000 21.7
062 J000000 0.0
062 K000000 0.0
062 L000000 0.0
062 M000000 0.0
062 N000000 0.0
062 O000000 0.0
062 P000000 0.0
062 Q000000 0.0
062 R000000 0.0
063 A000000 52
063 B000000 0.0
064 A000000 N
064 B000000 N
071 A000000 0
071 B000000 0
071 C000000 0
071 D000000 0
072 A000000 6
<PAGE>
072 B000000 27270
072 C000000 0
072 D000000 0
072 E000000 0
072 F000000 726
072 G000000 169
072 H000000 0
072 I000000 0
072 J000000 100
072 K000000 0
072 L000000 0
072 M000000 33
072 N000000 0
072 O000000 0
072 P000000 0
072 Q000000 0
072 R000000 0
072 S000000 0
072 T000000 0
072 U000000 9
072 V000000 0
072 W000000 90
072 X000000 1127
072 Y000000 0
072 Z000000 26143
072AA000000 0
072BB000000 0
072CC010000 0
072CC020000 0
072DD010000 0
072DD020000 0
072EE000000 0
073 A010000 0.0000
073 A020000 0.0000
073 B000000 0.0000
073 C000000 0.0000
074 A000000 0
074 B000000 80242
074 C000000 833162
074 D000000 0
074 E000000 0
074 F000000 0
074 G000000 0
074 H000000 0
074 I000000 0
074 J000000 0
074 K000000 0
074 L000000 7068
074 M000000 31
074 N000000 920503
074 O000000 0
<PAGE>
074 P000000 144
074 Q000000 0
074 R010000 0
074 R020000 0
074 R030000 0
074 R040000 218
074 S000000 0
074 T000000 920141
074 U010000 0
074 U020000 0
074 V010000 0.00
074 V020000 0.00
074 W000000 0.0000
074 X000000 2
074 Y000000 0
075 A000000 960468
075 B000000 0
076 000000 0.00
077 A000000 N
078 000000 N
SIGNATURE SUSAN JAKUBOSKI
TITLE ASSISTANT TREASURER
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
This schedule contains summary information from the U. S. Money Market Portfolio
Semi-Annual Report, dated December 31, 1997, and is qualified in its entirety by
reference to such report.
</LEGEND>
<CIK> 0000932281
<NAME> U.S. MONEY MARKET PORTFOLIO
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> JUN-30-1998
<PERIOD-END> DEC-31-1997
<INVESTMENTS-AT-COST> 913,403,891
<INVESTMENTS-AT-VALUE> 913,403,891
<RECEIVABLES> 7,068,418
<ASSETS-OTHER> 31,217
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 920,503,526
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 362,144
<TOTAL-LIABILITIES> 362,144
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 920,141,382
<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> 920,141,382
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 27,270,207
<OTHER-INCOME> 0
<EXPENSES-NET> 1,126,997
<NET-INVESTMENT-INCOME> 26,143,210
<REALIZED-GAINS-CURRENT> 0
<APPREC-INCREASE-CURRENT> 0
<NET-CHANGE-FROM-OPS> 26,143,210
<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> 2,237,743
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 726,272
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 1,126,997
<AVERAGE-NET-ASSETS> 960,468,490
<PER-SHARE-NAV-BEGIN> 0
<PER-SHARE-NII> 0
<PER-SHARE-GAIN-APPREC> 0
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 0
<EXPENSE-RATIO> 0.23
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
