The fund invests at least 80% of its net assets, plus any borrowings for investment purposes, in a portfolio of equity securities and investments that have economic characteristics similar to equity securities. These equity securities and investments may include U.S. exchange-listed common stocks, equity index futures, and/or exchange-traded funds (ETFs) that track U.S. large-capitalization (large-cap) indices, such as the S&P 500® Index.