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SUPPLEMENT TO THE PROSPECTUS
The date of this supplement is December 6, 2018.


MFS® Commodity Strategy Fund
Effective immediately, the section entitled "Portfolio Manager(s)" under the main heading entitled "Summary of Key Information" is replaced in its entirety as follows:
Portfolio Manager(s)
Portfolio Manager
Since
Title
Alexander Mackey
2017
Investment Officer of MFS
Benjamin Nastou
2010
Investment Officer of MFS
Natalie Shapiro
2010
Investment Officer of MFS
Effective January 1, 2019, the above table is restated in its entirety as follows:
Portfolio Manager
Since
Title
Philipp Burgener
January 2019
Investment Officer of MFS
Alexander Mackey
2017
Investment Officer of MFS
Benjamin Nastou
2010
Investment Officer of MFS
Natalie Shapiro
2010
Investment Officer of MFS
Effective immediately, the section entitled "Portfolio Manager(s)" beneath the main heading entitled "Management of the Fund" is replaced in its entirety as follows:
Portfolio Manager(s)
Information regarding the portfolio manager(s) of the fund is set forth below. Further information regarding the portfolio manager(s), including other accounts managed, compensation, ownership of fund shares, and possible conflicts of interest, is available in the fund’s SAI.
Portfolio Manager
Primary  Role
Five Year History
Alexander Mackey
Debt Instruments
Portfolio Manager
Employed in the investment area of MFS since 2001
Benjamin Nastou
Commodity-Linked Derivatives Portfolio Manager
Employed in the investment area of MFS since 2001
Natalie Shapiro
Commodity-Linked Derivatives Portfolio Manager
Employed in the investment area of MFS since 1997

Effective January 1, 2019, the above table is restated in its entirety as follows:
Portfolio Manager
Primary  Role
Five Year History
Philipp Burgener
Debt Instruments Portfolio Manager
Employed in the investment area of MFS since 2003
Alexander Mackey
Debt Instruments
Portfolio Manager
Employed in the investment area of MFS since 2001
Benjamin Nastou
Commodity-Linked Derivatives Portfolio Manager
Employed in the investment area of MFS since 2001
Natalie Shapiro
Commodity-Linked Derivatives Portfolio Manager
Employed in the investment area of MFS since 1997

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