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SHORT-TERM INVESTMENTS TRUST
TREASURY TAXADVANTAGE PORTFOLIO
INSTITUTIONAL CLASS
Supplement dated January 30, 1998
to the Prospectus
dated December 17, 1997
Effective February 4, 1998, purchase orders and redemption requests received by
A I M Fund Services, Inc., the Transfer Agent of the Portfolio, after 3:00 p.m.
Eastern Time on a business day of the Portfolio will be effected at the net
asset value determined on the next business day.
Effective February 4, 1998, (1) the net asset value per share of the Portfolio
will be determined daily as of 3:00 p.m. Eastern Time on each business day of
the Portfolio, (2) dividends from the net income of the Portfolio will be
declared daily to shareholders of record of the Class of the Portfolio
immediately after 3:00 p.m. Eastern Time, and (3) information concerning the
amount of the dividends declared on any particular day will normally be
available by 4:00 p.m. Eastern Time on that day.
Any request for correction to a transaction of Portfolio shares must be
submitted in writing to the Transfer Agent. The Transfer Agent reserves the
right to reject any such request. When a correction results in a dividend
adjustment, the institution must agree in writing to reimburse the Portfolio for
any loss resulting from the correction. Failure to deliver purchase proceeds on
the requested settlement date may result in a claim against the institution for
an amount equal to the overdraft charge incurred by the Portfolio.
