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<PAGE> MFS RESEARCH FUND Supplement to the Current Prospectus During the period from January 15, 1996 through February 29, 1996 (unless extended by MFS Fund Distributors, Inc. ("MFD")) (the "Sales Period"), MFD will pay FSC Securities Corporation ("FSC") an additional commission equal to 1.00% of the net asset value of all of the Class A and Class B shares of the Fund sold by FSC during the Sales Period. The date of this Supplement is January 15, 1996.
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