The fund normally invests at least 65% of its total assets in income-producing debt securities of U.S. and foreign corporations and governments, supranational organizations, semi-governmental entities or government agencies, authorities or instrumentalities, investment-grade U.S. or foreign mortgage-related securities, asset-backed securities, and U.S. or foreign short-term and long-term bank debt securities or bank deposits. It may invest in debt securities that are denominated in U.S. dollars or foreign currencies.