Under normal circumstances, the fund will invest at least 80% of its net assets, plus the amount of any borrowings for investment purposes, in bonds. It may invest in debt securities issued by any of the following: public and private U.S. companies; the U.S. government and its agencies, such as the Federal Home Loan Bank; and state and local governments issuing taxable municipal securities. The fund may also invest in asset-backed and mortgage-backed debt securities.