Launched by the Standard Statistics Company in 1926 as the successor to its 1923 233-stock weekly index, the Composite Stock Index was a daily 90-stock index that preceded the S&P 500. Following continual daily closure records from 17.66 in December 1927 to 31.71 in August 1929, the
Wall Street crash of 1929 began a trend of daily closure losses in which the index fell to a record low of 4.43 by June 1932. While the index saw a degree of recovery in subsequent years, closing at 18.09 in February 1937, it did not surpass its pre-
Great Depression record until its closure at 32.31 in September 1954. 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 resulted in the index nearly doubling to a closing price of 94.06 on February 9, 1966. The subsequent
1970s bear market and
early 1980s bull depression slowed growth of the index for over a decade. As a result of the mid-1980s bull market, the index tripled from 102.42 on August 12, 1982, to 336.77 on August 25, 1987. The subsequent stock market crash on October 19, 1987 (
Black Monday) saw the index lose 20.47% of its value, its highest daily percentage loss to date. Falling to 230.30 by November 1987, the index took until July 26, 1989, to recover to its pre-crash high of 336.77. Closing above 500 for the first time on March 24, 1995, the
dot-com bubble of the late 1990s fueled increased market growth through the turn of the millennium, with the S&P 500 surpassing 800 on February 12, 1997, and 1,000 on February 2, 1998, with an
intraday high of 1,552.87 on March 24, 2000. As a result of the
2002 stock market downturn, the index fell to 768.83 by October 10, 2002, and took until October 11, 2007, to surpass its March 2000 intraday trading high. While a brief bull market in 2007 led to the index achieving new record closures of 1,530.23 on May 30 through to 1,565.15 on October 9, the bursting of the
2000s United States housing bubble led to the
subprime mortgage crisis, the
2008 financial crisis, and the
Great Recession. These events, including the
bankruptcy of Lehman Brothers, caused substantial market
volatility that resulted in the S&P 500 closing up or down 3 percent or more 29 times in the fourth quarter of 2008. This included an increase of 11.6% on October 13, 2008, the index's highest daily percentage gain to date. In the year since its record closure of 1,565.15 in October 2007, the index fell by over 50% to 752.44 on November 20, 2008, its lowest point since March 1997. Closing the year at 903.25—a yearly loss of 38.5%—the index continued to decline in the first quarter of 2009, with the
2007–2009 bear market reaching a trough of 666 on March 6, 2009. The drawdown from the high in October 2007 to the low in March 2009 was 56.8%, the largest since
World War II. Despite this, the index recovered substantially in the following year, closing at 822.92 on March 23, 2009, and at 1,115.10 by the end of the year, making 2009 the index's second-best year of the decade. On April 14, 2010, the index closed at 1,210.65, its first close above 1,200 since August 2008. The index subsequently experienced a degree of volatility, falling to 1,022.58 by July 2, 2010, rising to 1,363.61 by April 29, 2011, and falling again below 1,100 by October 4, 2011, the latter due to the
August 2011 stock markets fall. While this period of volatility continued into 2012 amid electoral and fiscal uncertainty and round 3 of
quantitative easing, the index closed the year at 1,426.19, an annual gain of 13% and its biggest gain in 3 years. On March 28 and April 10, 2013, the index's October 2007 closing and intraday trading highs, respectively, were surpassed for the first time, recovering all losses incurred during the Great Recession. The index surpassed 2,000 for the first time on August 26, 2014, reaching an all-time closing high of 2,130.82 on May 21, 2015. The index surpassed 2,500 on September 25, 2017, finishing the year up 19.4%, its best since 2013. The index rose for the tenth month running in January 2018, falling 4% the next month in part due to the
doubling of market volatility on February 5. Following a strong third quarter and a weak fourth quarter, the year ended with the index declining by 6%, its worst year in a decade. High market growth in the next two quarters reversed the prior year's losses by April 2019, with the index surpassing 3,000 on July 10. The index closed the year with a growth rate of 28.9%, among its best to date. While the index reached a new closing peak of 3,386.15 on February 19, 2020, the onset of the
COVID-19 pandemic and
recession saw it lose 10% of its value in the next six trading days, its fastest drop from a new peak to date. At the trough of the
2020 stock market crash on March 23, 2020, the index had fallen 34% from its February peak. While the index fell by 20% by the end of the first quarter, its worst since 2008, it realized a 20% gain in the second quarter, its best since 1998. The index reached a new record high of 3,756.07 by the end of the year, By the end of the year the index closed 70 of the year's 252 trading days at new record closing prices, the second highest to date behind the 77 recorded in 1995. 2021 also marked the first year since 2005 when the S&P 500 beat the other two closely watched U.S. stock indices: the
Dow Jones Industrial Average and the
Nasdaq Composite. ==History==