S&P 500

A stock market index that measures the performance of 500 large companies listed on U.S. stock exchanges. It is widely regarded as a key indicator of the overall health of the U.S. stock market and includes companies from various sectors, with a market-capitalization-weighted structure that gives more influence to companies with larger market caps. The S&P 500 is primarily used by investors, financial analysts, and economists to gauge market trends and make informed investment decisions.