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SIGNATURE JOHN R ELDER
TITLE TREASURER
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
This schedule contains summary information extracted from the July 31, 1997
Domini Social Index Portfolio Annual Report and is qualified in its entirety by
reference to such report.
</LEGEND>
<CIK> 0000851681
<NAME> DOMINI SOCIAL INDEX PORTFOLIO
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> JUL-31-1997
<PERIOD-END> JUL-31-1997
<INVESTMENTS-AT-COST> 91,161,408
<INVESTMENTS-AT-VALUE> 291,396,680
<RECEIVABLES> 378,347
<ASSETS-OTHER> 3,566,465
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 295,341,492
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<TOTAL-LIABILITIES> 2982522
<SENIOR-EQUITY> 0
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<NET-INVESTMENT-INCOME> 2,240,276
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</TABLE>
The Board of Trustees
Domini Social Index Portfolio:
In planning and performing our audit of the financial statements of Domini
Social Index Portfolio, for the year ended July 31, 1997, 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, not to provide assurance on internal control.
The management of Domini Social Index 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 acquisitions, use or
disposition.
Because of inherent limitations in internal control, errors or irregularities
may occur and not be detected. Also, projection of any evaluation of internal
control to future periods is subject to the risks 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 internal control would not necessarily disclose all
matters in the 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 irregularities 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 internal control and its operation, including controls for
safeguarding securities, that we consider to be material weaknesses as defined
above as of July 31, 1997.
This report is intended solely for the information and use of management, the
Board of Trustees of Domini Social Index Portfolio and the Securities and
Exchange Commission.
/s/ KPMG PEAT MARWICK LLP
Boston, Massachusetts
September 26, 1997
