The Fund normally invests at least 80% of its total assets in securities that comprise the Fund's benchmark index. The US IG Index is comprised of U.S. dollar-denominated corporate bonds issued in the U.S. domestic market that have an investment grade rating based on the bonds composite rating, which is an average of ratings from various rating agencies. Bonds that fall below investment grade are removed from the US IG Index at the end of the month in which they are downgraded in connection with the US IG Index's next scheduled rebalance. The US IG Index is comprised of bonds issued by both U.S. and non-U.S. issuers that the US IG Index provider determines to have an attractive valuation based on proprietary credit risk metrics developed by Moody's Analytics, Inc. (Moody's Analytics). Further, bonds that the US IG Index provider determines to have the highest probability of being downgraded to non-investment grade, based on proprietary credit risk metrics developed by Moody's Analytics, are excluded from the US IG Index.