The fund normally invests at least 80% of assets in Ginnie Maes and repurchase agreements for Ginnie Maes. It invests in other U.S. government securities and instruments related to U.S. government securities. The fund invests in U.S. government securities issued by entities that are chartered or sponsored by Congress but whose securities are neither issued nor guaranteed by the U.S. Treasury. It seeks to have similar overall interest rate risk to the Bloomberg Barclays GNMA Index.