S&P 500

S&P 500

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S&P 500 (Standard and Poor's 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 $61.1 trillion as of December 31, 2025. The S&P 500 index is a public float weighted/capitalization-weighted index. The ten largest companies on the S&P 500 index account for approximately 38% of the market capitalization of the index and the 50 largest components account for 60% of the index.
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