MFS Charter Income Trust (Fund) is a diversified closed-end management investment company. The Fund's investment objective is to seek high current income, but may also consider capital appreciation. The Fund normally invests in debt instruments. The Fund also invests in corporate bonds of the United States and/or foreign issuers, the United States Government securities, foreign government securities, mortgage-backed and other asset-backed securities and/or debt instruments of issuers located in emerging market countries. The Fund's portfolio comprises bonds, floating rate loans, equities, cash and cash equivalent and other. It invests in a range of Fixed income sectors, such as high yield corporates non-united states government bonds, investment grade corporates, emerging markets bonds, commercial mortgage-backed securities, asset-backed securities and collateralized debt obligations. Massachusetts Financial Services Company is the Fund's investment advisor.