<PAGE> PAGE 1
000 A000000 12/31/99
000 C000000 0000934699
000 D000000 Y
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001 A000000 MUTUAL OF AMERICA INSTITUTIONAL FUNDS INC.
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010 A00AA01 MUTUAL OF AMERICA LIFE INSURANCE COMPANY
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011 A00AA01 MUTUAL OF AMERICA LIFE INSURANCE COMPANY
<PAGE> PAGE 2
011 B00AA01 8-32139
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014 A00AA01 MUTUAL OF AMERICA LIFE INSURANCE COMPANY
014 B00AA01 8-15356
014 A00AA02 MUTUAL OF AMERICA SECURITIES CORP.
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015 A00AA01 THE CHASE MANHATTAN BANK, N.A.ANY
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<PAGE> PAGE 3
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<PAGE> PAGE 4
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<PAGE> PAGE 5
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<PAGE> PAGE 6
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<PAGE> PAGE 7
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<PAGE> PAGE 8
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<PAGE> PAGE 9
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<PAGE> PAGE 10
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<PAGE> PAGE 11
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<PAGE> PAGE 12
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<PAGE> PAGE 13
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<PAGE> PAGE 14
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<PAGE> PAGE 15
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<PAGE> PAGE 16
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<PAGE> PAGE 17
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<PAGE> PAGE 18
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<PAGE> PAGE 19
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<PAGE> PAGE 20
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SIGNATURE BRIAN KEOGH
TITLE MANAGER
To the Board of Directors of
Mutual of America Institutional Funds, Inc.:
In planning and performing our audit of the financial statements of Mutual of
America Institutional Funds, Inc. for the year ended December 31, 1999, 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 Mutual of America Institutional Funds, Inc. 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 entitys 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 internal control, error 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 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 misstatements caused by error 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 internal controls and its operation, including controls for
safeguarding securities, that we consider to be material weaknesses as
defined above as of December 31, 1999.
This report is intended solely for the information and use of management,
the Board of Directors of Mutual of America Institutional Funds, Inc., and
the Securities and Exchange Commission.
SIGNATURE ON FILE WITH ORIGINAL
New York, New York
February 21, 2000
