The investment seeks to maximize total return. The fund invests, under normal circumstances, at least 80% of its net assets in bonds. The bonds in which the fund invests generally will have intermediate to long maturities. The fund's average weighted maturity will ordinarily range between four and twelve years. It invests in a portfolio of investment grade intermediate- and long-term debt securities, principally corporate bonds, U.S. treasury obligations and other U.S. government and agency securities, and asset-backed, mortgage-related and mortgage-backed securities.