Nuveen SP 500 BuyWrite Income Fund is a closedended equity indexed mutual fund launched by Nuveen Investments Inc It is comanaged by Nuveen Fund Advisors LLC and Gateway Investment Advisers LLC The fund invests in the public equity markets of the United States It seeks to invest in stocks of companies operating across diversified sectors The fund also invests through index call options It seeks to replicate the performance of the SP 500 Index by investing in proportion to their weighting in the index The fund was formerly known as Nuveen Equity Premium Income Fund Nuveen SP 500 BuyWrite Income Fund was formed on July 23 2004 and domiciled in the United States