Supplement No. 1 dated June 26, 2000
--------------------------------------------------------------------------------
to Prospectus dated August 1, 1999
for State Street Research Money Market Fund
A series of State Street Research Money Market Trust
In the Prospectus section captioned "Investor Expenses," the Annual Fund
Operating Expenses portion of the table is revised as follows:
<TABLE>
<S> <C> <C> <C> <C>
Annual Fund Operating Expenses (% of average net assets) Class B Class B(1) Class C Class E, S & T
----------------------------------------------------------------------------------------------------------------
Management fee 0.50 0.50 0.50 0.50
Distribution/service (12b-1) fees 1.00 1.00 1.00 0.00
Other expenses 0.27 0.27 0.27 0.27
---- ---- ---- ----
Total annual fund operating expenses* 1.77 1.77 1.77 0.77
==== ==== ==== ====
* Because some of the fund's expenses may be
subsidized, actual total operating expenses
are expected to be: 1.70(a) 1.70(a) 1.70(a) 0.70(a)
The fund expects the expense subsidy to continue throughthe current fiscal
year, although there is no guarantee that it will.
(a) Reflects expense subsidy arrangement that becameeffective June 1, 2000, as
if it had been in placeduring the fund's prior fiscal year.
</TABLE>
[Graphic: State Street Research Logo]
MM-1993-0600
Control Number: (exp0800)SSR-LD
