The SPDR S&P 500 ETF (NYSEARCA:SPY) is one of the most popular exchange-traded funds (ETFs) in the world. It seeks to track the performance of the S&P 500 Index, which is made up of 500 of the largest U.S. companies. State Street Global Advisors (SSgA), the issuer of the SPY ETF, is one of the […]