CENTENNIAL MONEY MARKET TRUST
Supplement dated May 20, 1998 to the
Prospectus dated October 1, 1997
This Supplement to the Prospectus replaces the Supplement dated December 1, 1997
and changes the Prospectus as follows:
1. In the first paragraph which follows the table entitled "Annual Trust
Operating Expenses (as a percentage of average net assets)" on page 3, the fifth
sentence is deleted and replaced with the following:
On November 21, 1997, the Manager withdrew its voluntary waiver and
amended its Agreement with the Trust.
2. The first two paragraphs in the section entitled "Fees and Expenses" on pages
A-1 to A-2 are deleted and replaced with the following paragraphs:
O Fees and Expenses. The management fee is payable monthly to the Manager
under the terms of each Trust's Agreement and is computed on the average annual
net assets of the respective Trust as of the close of business each day. The
annual rates applicable to Money Market Trust are as follows: 0.500% of the
first $250 million of net assets; 0.475% of the next $250 million of net assets;
0.450% of the next $250 million of net assets; 0.425% of the next $250 million
of net assets; 0.400% of the next $250 million of net assets; 0.375% of the next
$250 million of net assets; 0.350% of the next $500 million of net assets; and
0.325% of net assets in excess of $2 billion. Furthermore, the Manager
guarantees that the total expenses of Money Market Trust in any fiscal year,
exclusive of taxes, interest and brokerage commissions, and extraordinary
expenses such as litigation costs, shall not exceed, and the Manager undertakes
to pay or refund to Money Market Trust any amount by which such expenses shall
exceed, the lesser of (i) 1.5% of the average annual net assets of Money Market
Trust up to $30 million and 1% of its average annual net assets in excess of $30
million; or (ii) 25% of total annual investment income of Money Market Trust.
(continued)
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The annual rates applicable to Government Trust are as follows: 0.50% of
the first $250 million of net assets; 0.475% of the next $250 million of net
assets; 0.45% of the next $250 million of net assets; 0.425% of the next $250
million of net assets; and 0.40% of net assets in excess of $1 billion.
The annual rates applicable to Tax Exempt Trust are as follows: 0.50% of
the first $250 million of net assets; 0.475% of the next $250 million of net
assets; 0.45% of the next $250 million of net assets; 0.425% of the next $250
million of net assets; 0.40% of the next $250 million of net assets; 0.375% of
the next $250 million of net assets; 0.35% of the next $500 million of net
assets and 0.325% of net assets in excess of $2 billion. Furthermore, under Tax
Exempt Trust's Agreement, when the value of Tax Exempt Trust's net assets is
less than $1.5 billion, the annual fee payable to the Manager shall be reduced
by $100,000 based on average net assets computed daily and paid monthly at the
annual rates, but in no event shall the annual fee be less than $0. See the
Statement of Additional Information for an explanation of the Manager's
reimbursement arrangement for the Trusts set forth in their Agreements.
"Investment Management Services" in the Statement of Additional Information
contains more complete information about the Agreements, including a discussion
of expense arrangements, and a description of the exculpation provisions and
portfolio transactions.
3. Effective June 1, 1998, the second sentence of the fourth paragraph entitled
"Exchange Privilege" in the section entitled "Exchanges of Shares" on page A-10
is modified to read as follows:
The redemption proceeds of shares of the Trust, acquired by exchange of
Class A shares of an Eligible Fund purchased subject to a Class A
Contingent Deferred Sales Charge ("CDSC") and redeemed within 18 months of
the end of the calendar month of the initial purchase of the exchanged
shares, will be subject to the Class A CDSC as described in the prospectus
of that other Eligible Fund. (A different holding period may apply to
shares purchased prior to June 1, 1998).
May 20, 1998 PS0150.003
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