This page tracks the live S&P 500 index quote for ticker ^GSPC, including the latest price, 24-hour change and, for companies, the current market capitalization in US dollars.
Market cap is calculated as the latest share price multiplied by shares outstanding, converted to USD where the index trades in another currency. Price history is available over 7 days, 1 month, 6 months, year-to-date and 5 years.
See all companies ranked by market cap or learn how market cap is calculated.