Description
The S&P 500 Index is a market capitalization-weighted stock index compiled by S&P Dow Jones Indices. It consists of 500 of the largest and most liquid publicly traded companies in the United States, covering leading firms across various industries such as energy, technology, healthcare, and finance. The market value of the companies in the index accounts for approximately 80% of the total market capitalization of all publicly listed companies in the U.S., making it a critical benchmark for assessing the overall performance of the U.S. stock market and economic health.