The investment seeks investment results that closely correspond, before fees and expenses, to the performance of the Bloomberg U.S. Corporate Bond Index. The fund will invest at least 80% of its assets in securities included in the underlying index. The underlying index is market capitalization weighted and is designed to measure the performance of U.S. dollar denominated investment grade corporate debt publicly issued in the U.S. domestic market. The underlying index is a component of the Bloomberg U.S. Credit and Bloomberg U.S. Aggregate indices.