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<PAGE>
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SIGNATURE SUSAN JAKUBOSKI
TITLE ASSISTANT TREASURER
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
This schedule contains summary information from the U. S. Money Market Portfolio
Annual Report, dated June 30, 1998, and is qualified in its entirety by
reference to such report.
</LEGEND>
<CIK> 0000932281
<NAME> U. S. MONEY MARKET PORTFOLIO
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> JUN-30-1998
<PERIOD-END> JUN-30-1998
<INVESTMENTS-AT-COST> 933,306,730
<INVESTMENTS-AT-VALUE> 933,306,730
<RECEIVABLES> 5,162,252
<ASSETS-OTHER> 22,757
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 938,491,739
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 354,771
<TOTAL-LIABILITIES> 354,771
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 938,136,968
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<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> 938,136,968
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 55,119,874
<OTHER-INCOME> 0
<EXPENSES-NET> 2,215,265
<NET-INVESTMENT-INCOME> 52,904,609
<REALIZED-GAINS-CURRENT> 0
<APPREC-INCREASE-CURRENT> 0
<NET-CHANGE-FROM-OPS> 52,904,609
<EQUALIZATION> 0
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<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 0
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<SHARES-REINVESTED> 0
<NET-CHANGE-IN-ASSETS> 20,233,329
<ACCUMULATED-NII-PRIOR> 0
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<GROSS-ADVISORY-FEES> 1,466,761
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 2,215,265
<AVERAGE-NET-ASSETS> 977,840,664
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<EXPENSE-RATIO> 0.23
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
INDEPENDENT AUDITORS' REPORT
To the Board of Trustees and Shareholders of U.S. Money Market Portfolio:
In planning and performing our audit of the financial statements of U.S. Money
Market Portfolio (the "Portfolio") for the year ended June 30, 1998 (on which we
have issued our report dated August 7, 1998), we considered its internal
control, including control activities for safeguarding securities, in order to
determine our auditing procedures for the purpose of expressing our opinion on
the financial statements and to comply with the requirements of Form N-SAR, and
not to provide assurance on the Portfolio's internal control.
The management of the Portfolio is responsible for establishing and
maintaining internal control. In fulfilling this responsibility, estimates and
judgments by management are required to assess the expected benefits and related
costs of controls. Generally, controls that are relevant to an audit pertain to
the entity's objective of preparing financial statements for external purposes
that are fairly presented in conformity with generally accepted accounting
principles. Those controls include the safeguarding of assets against
unauthorized acquisition, use or disposition.
Because of inherent limitations in any internal control, errors or fraud
may occur and not be detected. Also, projection of any evaluation of internal
control to future periods is subject to the risk that it may become inadequate
because of changes in conditions or that the effectiveness of the design and
operation may deteriorate.
Our consideration of the Portfolio's internal control would not necessarily
disclose all matters in internal control that might be material weaknesses under
standards established by the American Institute of Certified Public Accountants.
A material weakness is a condition in which the design or operation of one or
more of the internal control components does not reduce to a relatively low
level the risk that errors or fraud in amounts that would be material in
relation to the financial statements being audited may occur and not be detected
within a timely period by employees in the normal course of performing their
assigned functions. However, we noted no matters involving the Portfolio's
internal control and its operation, including controls for safeguarding
securities, that we consider to be material weaknesses as defined above as of
June 30, 1998.
This report is intended solely for the information and use of management,
the Trustees of U. S. Money Market Portfolio, and the Securities and Exchange
Commission.
/s/ Deloitte & Touche LLP
August 7, 1998
