The S&P 500 is a stock market index that measures the stock performance of 500 large companies listed on stock exchanges in the United States. It is one of the most commonly followed indices to gauge the overall health of the U.S. stock market.
There are several ways to buy the S&P 500. One way is to buy an exchange-traded fund (ETF) that tracks the index. ETFs are baskets of securities that trade on exchanges, just like stocks. There are several ETFs that track the S&P 500, such as the SPDR S&P 500 ETF (SPY) and the Vanguard S&P 500 ETF (VOO).