The Fund generally will invest at least 90% of its total assets in securities that comprise the Underlying Index. The underlying Index is a total return benchmark index that is designed to track the performance of a hypothetical buy-write strategy on the S&P 500 Index. The Underlying Index is based on buying an S&P 500 stock index portfolio and writing or selling the near-term S&P 500 Index covered call option, generally on the third Friday of each month.