The S&P 500, an index of 500 publicly traded companies in the United States, closed at *** points on the last trading day of December 2024.Â
What is the S&P 500?
The S&P 500 is a stock market index that tracks the evolution of 500 companies. In contrast to the Dow Jones Industrial Index, which measures the performance of thirty large U.S. companies, the S&P 500 shows the sentiments in the broader market.
Publicly traded companies
Companies on the S&P 500 are publicly traded, meaning that anyone can invest in them. A large share of adults in the United States invest in the stock market, though many of these are through a retirement account or mutual fund. While most people make a modest return, the most successful investors have made billions of U.S. dollars through investing.
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Yahoo. (February 28, 2025). Monthly development of the S&P 500 Index from January 2018 to December 2024 [Graph]. In ÌÇÐÄÆÆ½â°æ. Retrieved July 19, 2026, from /statistics/697624/monthly-sandp-500-index-performance/
Yahoo. "Monthly development of the S&P 500 Index from January 2018 to December 2024." Chart. February 28, 2025. ÌÇÐÄÆÆ½â°æ. Accessed July 19, 2026. /statistics/697624/monthly-sandp-500-index-performance/
Yahoo. (2025). Monthly development of the S&P 500 Index from January 2018 to December 2024. ÌÇÐÄÆÆ½â°æ. ÌÇÐÄÆÆ½â°æ Inc.. Accessed: July 19, 2026. /statistics/697624/monthly-sandp-500-index-performance/
Yahoo. "Monthly Development of The S&p 500 Index from January 2018 to December 2024." ÌÇÐÄÆÆ½â°æ, ÌÇÐÄÆÆ½â°æ Inc., 28 Feb 2025, /statistics/697624/monthly-sandp-500-index-performance/
Yahoo, Monthly development of the S&P 500 Index from January 2018 to December 2024 ÌÇÐÄÆÆ½â°æ, /statistics/697624/monthly-sandp-500-index-performance/ (last visited July 19, 2026)
Monthly development of the S&P 500 Index from January 2018 to December 2024 [Graph], Yahoo, February 28, 2025. [Online]. Available: /statistics/697624/monthly-sandp-500-index-performance/