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S&P 500 Index

Definition

The S&P 500 Index is a stock market index that represents the performance of 500 of the largest publicly traded companies in the United States. It is a market-capitalization-weighted index, meaning companies with larger market values have a greater impact on the index’s performance. The S&P 500 is widely considered one of the best gauges of large-cap U.S. equities and the overall health of the American economy. It serves as a benchmark for many investment funds.