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. Wikipedia
Constituents: 503
Exchanges: NYSE; Nasdaq; Cboe BZX Exchange
Foundation: March 4, 1957; 68 years ago
Market cap: US$52.614 trillion; (as of May 30, 2025)
Related indices: S&P 1500; S&P Global 1200; S&P 100
Trading symbol: ^GSPC; $SPX; SPX.SPX.INX
Weighting method: Free-float capitalization-weighted
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