The fund generally will invest at least 90% of its total assets in the securities that comprise the underlying index. The underlying index is designed to measure the performance of approximately 100 stocks in the S&P 500® Index that have the highest "momentum score." In general, momentum is the tendency of an investment to exhibit persistence in its relative performance; a "momentum style" of investing emphasizes investing in securities that have had better recent performance compared to other securities. It is non-diversified.