The fund invests at least 80% of its net assets in U.S. Treasury bills (the "U.S. Treasuries") and FLexible EXchange® Options ("FLEX Options") that are based on the value of a broad-based U.S. equity index, such as the S&P 500® Price Return Index (the "U.S. Equity index"). FLEX options are exchange-traded option contracts with uniquely customizable terms. The fund is non-diversified.