The MFS Government Markets Income Trust is a closed-end mutual fund managed by Massachusetts Financial Services Company, specializing in fixed-income investments. This trust primarily allocates its capital to the United States' fixed income markets, with a core emphasis on debt instruments considered investment grade. Beyond its primary focus, the fund diversifies its portfolio into a range of other assets. These include various mortgage-backed securities (both general and residential), debt issued by U.S. government agencies, international sovereign bonds, U.S. Treasuries, emerging markets debt, and high-grade corporate bonds. It also maintains holdings in cash and other net assets for liquidity. The performance of the fund's investment portfolio is benchmarked against the Barclays U.S. Government/Mortgage Bond Index. Established on May 28, 1987, the MFS Government Markets Income Trust is domiciled within the United States.