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sp500 - inbefore

S&P 500

The S&P 500 is a stock market index tracking the stock performance of 500 companies listed on stock exchanges in the United States that are considered to have large... 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$68.4 trillion, (as of Sep 30, 2026)
  • Weighting method:  Free-float capitalization-weighted
  • Related indices:  S&P 1500, S&P Global 1200, S&P 100
  • Data source:  DuckDuckGo
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