The investment seeks to track the investment results (before fees and expenses) of the Invesco Defensive Equity Index (the underlying index). The fund generally will invest at least 80% of its total assets in the securities that comprise the underlying index. The underlying index is comprised of a subset of securities from the S&P 500® Index (the S&P 500). The fund will concentrate its investments in securities of issuers in any one industry or group of industries only to the extent that the underlying index reflects a concentration in that industry or group of industries.