The investment seeks to track the investment results (before fees and expenses) of the Invesco Investment Grade Value Index (the underlying index). The fund generally will invest at least 80% of its total assets in securities that comprise the underlying index. The underlying index is designed to provide exposure to higher value, U.S. investment grade bonds. In addition, the underlying index seeks to incorporate securities with the highest quality scores (within the eligible universe of U.S. investment grade bonds) as determined by the index provider.