The investment seeks investment results that correspond generally to the price and yield performance, before fees and expenses, of the Barclays U.S. Government/Credit 1-5 Year Bond Index. The fund generally invests at least 90% of its assets in the securities of the underlying index. The underlying index measures the performance of U.S. dollar-denominated U.S. Treasury bonds, government-related bonds (i.e., U.S. and non-U.S. agencies, sovereign, quasi-sovereign, supranational and local authority debt) and investment-grade U.S. corporate bonds that have a remaining maturity of greater than or equal to one year and less than five years.