The investment seeks investment results that correspond generally to the price and yield performance, before fees and expenses, of the Northern Trust High Yield Value-Scored US Corporate Bond IndexSM. The index reflects the performance of a broad universe of U.S.-dollar denominated high yield corporate bonds that seeks a higher total return than the overall high yield corporate bond market, as represented by the Northern Trust High Yield US Corporate Bond IndexSM. The fund generally will invest under normal circumstances at least 80% of its total assets (exclusive of collateral held from securities lending) in the securities of its index.