S & P 500 Index

The S&P 500 is an index of the approximately 500 largest publicly traded companies in the US by market capitalization. It is a price-weighted index, so the higher the price of a company’s stock the higher the weighting. It is one of the leading trading vehicles in the options and stock markets. The S & P 500 was 4357.70 on September 20, 2021.

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