<PAGE>
MFS EMERGING GROWTH FUND
MFS LIMITED MATURITY FUND
MFS WORLD GROWTH FUND
Supplement to the Current Prospectus
During the period from September 3, 1996 through October 31, 1996 (unless
extended by MFS Fund Distributors, Inc. ("MFD")) (the "Sales Period"), MFD will
pay Everen Securities, Inc. ("Everen") 100% of the applicable sales charge on
sales of Class A shares of each of the funds listed above (the "Funds") sold by
Everen during the Sales Period. In addition, MFD will pay Everen an additional
commission equal to 0.50% of the net asset value of all of the Class B shares of
the Funds sold by Everen during the Sales Period.
The date of this Supplement is August 30, 1996.