S&P 500

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... Wikipedia

• Foundation:  March 4, 1957
• Operator:  S&P Dow Jones Indices
• Exchanges:  NYSE, Nasdaq, Cboe BZX Exchange
• Constituents:  503
• Type:  Large-cap
• Market cap:  US$61.0 trillion, (as of October 31, 2025)
• Weighting method:  Free-float capitalization-weighted
• Related indices:  S&P 1500, S&P Global 1200, S&P 100
• Website:  spglobal.com/sp-500
• Data source:  DuckDuckGo