The investment seeks maximum total return, consistent with preservation of capital and prudent investment management. The fund normally invests at least 80% of assets in a diversified portfolio of securities of varying maturities issued by the Government National Mortgage Association. It may invest up to 10% of total assets in investment-grade securities. The fund may invest up to 10% of assets in U.S. dollar-denominated securities of issuers that are economically tied to emerging market countries.