The fund generally invests in the stocks that comprise the S&P 500® Index in approximately the proportions they are represented in the S&P 500® Index. Under normal market conditions, at least 95% of the fund's net assets will be invested in the stocks that comprise the S&P 500® Index. The fund may purchase or sell futures contracts and options on futures contracts for U.S. equity securities and indices, to increase or decrease equity market exposure based on actual or expected cash inflows to or outflows from the Portfolio.