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VERTEX RESEARCH ALL CAP FUND
Supplement to the Current Prospectus and Statement of Additional Information
On August 1, 1998, the following changes to the Fund's Prospectus and
Statement of Additional Information are in effect:
o The name of the Fund has been changed to the "Vertex U.S. All Cap
Fund."
o The description of the Fund on the cover page of the Prospectus
is revised as follows:
"Vertex U.S. All Cap Fund ( the "U.S. All Cap Fund") - The
investment objective of the U.S. All Cap Fund is capital
appreciation. The Fund invests, under normal market conditions,
at least 65% of its total assets in all types of U.S. equity
securities."
o The description of the Fund on page 6 of the Prospectus under the
caption "Investment Objective and Policies" is revised as follows:
U.S. All Cap Fund
"The U.S. All Cap Fund, like the All Cap Fund, is flexibly managed
(see "All Cap Fund" above). However, unlike the All Cap Fund which
can invest up to 100% of its total assets in foreign securities,
the Fund will invest, under normal market conditions, at least 65%
of its total assets in equity securities issued by U.S. companies
or traded on a U.S. securities exchange."
o The identification of the portfolio manager for the Fund on page
17 of the Prospectus under the caption "Management of the Funds"
is revised as follows:
"U.S. All Cap Fund Paul M. McMahon, a Senior Vice President of
the Adviser and MFS, has been employed as a
portfolio manager by MFS since 1981."
The date of this Supplement is August 1, 1998.
