The investment seeks to provide total return that closely corresponds, before fees and expenses, to the total return of the ICE BofA Long US Treasury Principal STRIPS Index. The fund invests at least 80% of its total assets (exclusive of collateral held from securities lending) in the component securities of the ICE BofA Long US Treasury Principal STRIPS Index (the underlying index). The underlying index is an unmanaged index comprised of long maturity Separate Trading of Registered Interest and Principal of Securities (STRIPS) representing the final principal payment of U.S. Treasury bonds.