The index is comprised of (a) long positions in USD-denominated investment grade corporate bonds issued by both U.S. and foreign domiciled companies; and (b) short positions in U.S. Treasury notes or bonds ("Treasury Securities") of, in aggregate, approximate equivalent duration to the investment grade bonds. The fund will invest at least 80% of its total assets in component securities (i.e., securities of the index) and invest at least 80% of its total assets in investment grade bonds.