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The S&P 500 index is a free-float ... six months leading up to the evaluation date; ... Since its inception in 1926, the index's compound annual growth rate ...
In March 1957 the index was expanded to its current 500-stock structure and renamed the S&P 500 Stock Composite Index. Subsequently, closing beyond 50 for the first time in September 1958, the continued post-World War II boom in the United States would see the index nearly double to a closing price of 94.06 on February 9, 1966.
Date Close Change Net % 1 1987-10-19 ... This table shows the largest intraday point swings since 1967. Rank Date ... List of largest daily changes in the S&P 500 Index.
The S&P 500: 15-year return of 495% (12.6% annually) The S&P 500 tracks 500 large and profitable U.S. companies. The index is weighed by market capitalization, such that larger companies have more ...
The analysts went on to suggest the S&P 500 index's component companies will generate earnings-per-share growth of 15.2% in 2025, outpacing this year's 10% growth.
^SPX data by YCharts.. Of the last 10 S&P 500 bull markets dating back to 1970, half of them have lasted at least 1,000 days. All but two have gone on for longer than the median 522 days.
Stock market indices may be categorized by their index weight methodology, or the rules on how stocks are allocated in the index, independent of its stock coverage. For example, the S&P 500 and the S&P 500 Equal Weight each cover the same group of stocks, but the S&P 500 is weighted by market capitalization, while the S&P 500 Equal Weight places equal weight on each constituent.
The S&P 500 Index broke its 31st record of the year on Tuesday, closing at 5,487.03, according to Bloomberg data. While the index is up over 15% this year, that growth is by no means evenly shared.