Effective February 1, 2013, the second paragraph and subsequent bullets in the sub-section directly beneath the main heading "Description of Share Classes" are restated as follows:
 
Class I shares generally are available only to the following eligible investors:
 
·  
certain retirement plans established for the benefit of employees and former employees of MFS or its affiliates;
 
·  
defined benefit retirement plans, endowments or foundations;
 
·  
bank trust departments or law firms acting as trustee or manager for trust accounts;
 
·  
investors who purchase shares through asset-based fee programs available through financial intermediaries;
 
·  
employees and former employees of MFS and its subsidiaries who were employed by MFS or its subsidiaries on or after January 1, 2013, trusts, pension, profit-sharing or other retirement plans for the sole benefit of such persons, and joint accounts with such persons' spouses or legal equivalents under applicable state law; and
 
·  
trustees and former trustees of any investment company for which MFD serves as a distributor and who served as trustee on or after January 1, 2013, trusts, pension, profit-sharing or other retirement plans for the sole benefit of such persons, and joint accounts with such persons' spouses or legal equivalents under applicable state law.
 
In addition, MFD may accept, in its sole discretion, investments in Class I shares from purchasers not listed above.