The investment seeks to provide a total return that matches or incrementally exceeds the performance of the U.S. investment-grade bond market. Under normal conditions, the fund invests at least 80% of its net assets in bonds that are held in its benchmark index. Consistent with the benchmark index, the fund’s holdings will normally include U.S. government and agency obligations, mortgage- and asset-backed securities, corporate bonds, and U.S. dollar-denominated securities of foreign issuers. The index is a broadly diversified index that typically consists of investment-grade, fixed income instruments with intermediate- to long-term maturities.