Normally investing at least 80 percent of assets in common stocks included in the S&P 500 Index, which is a market capitalization-weighted index of 500 common stocks chosen for market size, liquidity, and industry group representation to represent U.S. equity performance. Generally using computer-aided, quantitative analysis of historical valuation, growth, profitability, and other factors to select a broadly diversified group of stocks that may have the potential to provide a higher total return than that of the S&P 500 Index. Investing in domestic and foreign issuers. Lending securities to earn income for the fund.