The investment seeks total return on an after-tax basis. The fund seeks to achieve its investment objective by investing in a diversified portfolio of fixed income debt instruments of varying maturities. Under normal circumstances, it invests at least 80% of its assets in U.S. dollar-denominated, investment-grade fixed income debt instruments. Fixed income debt instruments include bonds, debt securities and other similar instruments issued by various U.S. and non-U.S. public or private-sector entities.