BT INVESTMENT FUNDS
497, 1999-12-22
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BT INVESTMENT FUNDS
Investment Cash Management Fund, Investment Treasury Money Fund, NY Tax Free
Money Fund and Tax Free Money Fund

BT ADVISOR FUNDS
U.S. Bond Index Fund, EAFE(R) Equity Index Fund and Small Cap Index Fund

BT PYRAMID MUTUAL FUNDS
Money Market Fund and Investment Equity 500 Index Fund

SUPPLEMENT DATED DECEMBER 23, 1999 (REPLACING SUPPLEMENT DATED DECEMBER 6, 1999)
TO PROSPECTUS DATED APRIL 30, 1999

THE FOLLOWING REVISES EACH FUND'S ADDRESS FOR ALL CORRESPONDENCE, INCLUDING
APPLICATIONS:

                             BT Service Center
                             P.O. Box 219210
                             Kansas City, MO 64121-9210

THE FOLLOWING REPLACES THE SECOND SENTENCE IN THE "CALCULATING A FUND'S SHARE
PRICE" SECTION WITH RESPECT TO INVESTMENT CASH MANAGEMENT FUND, INVESTMENT
TREASURY MONEY FUND, NY TAX FREE MONEY FUND, TAX FREE MONEY FUND AND MONEY
MARKET FUND:

Early Close on Certain Days

On the day before certain holidays are observed, the bond markets or other
primary trading markets for the Funds may close early. If the Bond Market
Association recommends an early close of the bond markets, the Funds also may
close early. You may call the Service Center at 1-800-730-1313 for additional
information about whether the Funds will close before a particular holiday. On
days a Fund closes early:

     All orders received prior to the Fund's close will be processed as of the
     time the Fund's NAV is next calculated.

     Redemption orders received after the Fund's close will be processed as of
     the time the Fund's NAV is next calculated.

     Purchase orders received after the Fund's close will be processed the next
     business day.

On December 31, 1999, the Funds will close at:

Investment Cash Management Fund                  12:00 p.m.
Investment Treasury Money Fund                   12:00 p.m.
NY Tax Free Money Fund                           10:45 a.m.
Tax Free Money Fund                              10:45 a.m.
Money Market Fund                                12:00 p.m.
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THE FOLLOWING SUPPLEMENTS THE "MANAGEMENT OF THE FUNDS" SECTION WITH RESPECT TO
EACH FUND:

On June 4, 1999, Bankers Trust Corporation merged with a subsidiary of Deutsche
Bank A.G. ("Deutsche Bank"). Deutsche Bank is a major global banking institution
that is engaged in a wide range of financial services, including investment
management, mutual funds, retail and commercial banking, investment banking and
insurance. At a Special Meeting of Shareholders ("Special Meeting") held earlier
this year, shareholders approved a new investment advisory agreement (the
"Advisory Agreement") with Bankers Trust Company ("Bankers Trust"). Approval of
the Advisory Agreement was sought because Deutsche Bank became Bankers Trust's
parent company and, therefore, controls its operations as investment adviser.

At the Special Meeting, shareholders of each Fund except Investment Cash
Management Fund, Money Market Fund, Investment Equity 500 Index Fund,
Institutional Cash Management Fund, Cash Reserves Fund and Institutional Equity
500 Index Fund also approved a new investment advisory agreement with Deutsche
Asset Management, Inc. ("DAMI") (formerly Morgan Grenfell Inc.). The new
investment advisory agreement with DAMI may be implemented within two years of
the date of the Special Meeting upon approval of a majority of the members of
the Board of Trustees who are not "interested persons" ("Independent Trustees").
Shareholders of each Fund except Investment Cash Management Fund, Money Market
Fund, Investment Equity 500 Index Fund, Institutional Cash Management Fund, Cash
Reserves Fund and Institutional Equity 500 Index Fund also approved a new sub-
investment advisory agreement among each Fund's portfolio, DAMI and Bankers
Trust under which Bankers Trust may perform certain of DAMI's responsibilities,
at DAMI's expense, upon approval of the Independent Trustees, within two years
of the date of the Special Meeting.

The new investment advisory agreement with DAMI and the new sub-investment
advisory agreement with Bankers Trust will permit Deutsche Bank to simplify the
organizational structure of its U.S. mutual fund operations, enhance the
efficiency of their administration and promote consistency of internal controls,
compliance and regulatory oversight. The deferral in implementing the new
investment advisory and sub-investment advisory agreements is needed to permit
Deutsche Bank a sufficient amount of time to plan, prepare and institute the
necessary arrangements for DAMI to consolidate Deutsche Bank's U.S. mutual fund
operations.

Under the new investment advisory agreements and new sub-advisory agreement, the
compensation paid and the services provided would be the same as those under the
Advisory Agreement with Bankers Trust.

About DAMI. DAMI is located at 885 Third Avenue, 32nd Floor, New York, New York
10022. DAMI provides a full range of investment advisory services to
institutional clients. DAMI serves as investment adviser to ten other investment
companies and as sub-adviser to five other investment companies.


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THE FOLLOWING REVISES THE "MANAGEMENT OF THE FUND: PORTFOLIO MANAGER(S)" SECTION
WITH RESPECT TO U.S. BOND INDEX FUND, EAFE(R) EQUITY INDEX FUND, SMALL CAP INDEX
FUND AND INVESTMENT EQUITY 500 INDEX FUND:

The "Portfolio Manager(s)" section is hereby omitted.

               PLEASE RETAIN THIS SUPPLEMENT FOR FUTURE REFERENCE

SUPPINVEST3 (12/99)

CUSIPS:
055922108   05576L866
055922405   05576L874
055922207   05576L882
055922306   055847206
055847107


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