The S&P 500 Stock Composite Index and the NASDAQ Composite Index can be used to represent the stock market as a whole.

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Both the S&P 500 and NASDAQ are widely recognized and used benchmarks for measuring the performance of the overall stock market. The S&P 500 includes the 500 largest publicly-traded companies in the US and represents about 80% of the total US stock market capitalization, while the NASDAQ Composite includes over 3,000 companies that are mostly technology-oriented and tracks the performance of technology and growth-oriented stocks.