This bond fund specializes in government mortgage-backed securities. The fund primarily invests in GNMA securities, which are backed by the full faith and credit of the U.S. government and typically offer a higher yield than U.S. Treasuries. In addition to other bond market risks, the fund is subject to prepayment risk. When mortgage refinance activity is high, the yield on the fund is likely to decrease. Investors with a medium-term time horizon and a goal of monthly income may wish to consider the fund for the fixed income portion of their portfolio. Please note: U.S. government backing of agency securities applies only to the underlying securities and does not prevent share-price fluctuations in the fund.