The Standard and Poor's 500, or simply the S&P 500, is a stock market index tracking the stock performance of 500 leading companies listed on stock exchanges in the United States. It is one of the most commonly followed equity indices and includes approximately 80% of the total market capitalization of U.S. public companies, with an aggregate market cap of more than $43 trillion as of January 2024.
Wall Street plunged as Trump's tariff war sent global markets into turmoil. The S&P 500 saw its worst drop since 2020, while Trump..