The S&P 500® is widely regarded as the best single gauge of large-cap U.S. equities. There is over USD 7.8 trillion benchmarked to the index, with index assets comprising approximately USD 2.2 trillion of this total. The index includes 500 leading companies and captures approximately 80% coverage of available market capitalization. Created in 1957, the S&P 500 was the first US market-cap-weighted stock market index. Today, it is the basis of many listed and over-the-counter investment instruments. The world-renowned index includes 500 of the top companies in leading industries of the US economy.