What It’s for and Why It’s Very important in Investing
What Is the S&P 500 Index? The S&P 500 Index, or Standard & Poor’s 500 Index, is a market-capitalization-weighted index of 500 leading publicly traded companies in the U.S. It is not an exact list of the top 500 U.S. companies by market cap because there are other criteria that the index includes. Still, the S&P