The investment seeks to track the investment results (before fees and expenses) of the S&P MidCap 400 Momentum Index (the "underlying index"). The fund generally will invest at least 90% of its total assets in the securities that comprise the underlying index. Strictly in accordance with its guidelines and mandated procedures, the index provider compiles, maintains and calculates the underlying index, which is composed of constituents of the S&P MidCap 400 that have the highest momentum score.