The investment seeks to provide investors with returns that match the price return of the SPDR® S&P 500® ETF Trust. The fund invests at least 80% of its net assets in FLexible EXchange® Options (FLEX Options) that reference the SPDR® S&P 500® ETF Trust. FLEX Options are exchange-traded options contracts with uniquely customizable terms. The reference asset for all of the fund's FLEX Options is the underlying ETF, an exchange-traded unit investment trust that seeks to provide investment results that, before expenses, correspond generally to the price and yield performance of the S&P 500® Index. It is non-diversified.