A stock market crash is characterized by a rapid and substantial decrease in stock prices across a significant portion of the market, leading to substantial paper wealth losses. These crashes are typically fueled by panic selling, which can be triggered by underlying economic problems or the bursting of speculative bubbles. They often follow periods of rampant speculation and unsustainable economic growth, creating a volatile market vulnerable to sudden corrections.
In 1907, stock prices fell by nearly 50% due to manipulation of copper stocks by the Knickerbocker Trust Company, leading to panic and the closure of investment trusts and banks.
In 1908, the panic that started in 1907 continued, leading to further economic instability.
In 1913, the Federal Reserve was formed as a result of the panic that started in 1907 and continued to 1908.
On August 24, 1921, the Dow Jones Industrial Average (DJIA) was at 63.9.
On September 3, 1929, the Dow Jones Industrial Average (DJIA) had risen to 381.2, more than sixfold since August 24, 1921.
By November 11, 1929, the index stood at 228, a cumulative drop of 40% from the September high.
In July 1932, the DJIA finally bottomed out after losing 89% of its value, marking the end of a significant decline.
In 1963, Benoit Mandelbrot suggested that the statistics prove this assumption incorrect and observed that large movements in prices (i.e. crashes) are much more common than would be predicted from a log-normal distribution.
In 1963, Mandelbrot proposed that stock price variations followed a Lévy flight, a random walk occasionally disrupted by large movements, instead of a strict random walk.
In August 1982, the Dow Jones Industrial Average (DJIA) was at 776.
In August 1987, the Dow Jones Industrial Average (DJIA) rose to 2722, marking a peak in a period of strong economic optimism.
In October 1987, all major world markets crashed or declined substantially, with most industrial countries experiencing declines greater than 20%.
In late October 1987, George Soros said, "Mr. Robert Prechter's reversal proved to be the crack that started the avalanche."
On October 19, 1987, known as Black Monday, the DJIA plummeted 508 points, losing 22.6% of its value. The S&P 500 Index dropped 20.4%, and the NASDAQ Composite lost 11.3% due to market system failures.
During the calendar year 1987, the DJIA gained 0.6% despite the crash.
Following Black Monday in 1987, trading curbs, or "circuit breakers", were introduced as a mitigation strategy. These curbs halt trading in both the cash market and the derivative markets based on substantial movements in a broad market indicator to prevent speculative gains and dramatic losses within a short time frame.
In 1987, one of the consequences of the Crash was the introduction of the circuit breaker or trading curb on the NYSE.
In 1987, the event known as Black Monday occurred, but it did not lead to a bear market.
In 1987, the reasons behind the crash were analyzed, with blame apportioned to factors such as program trading, portfolio insurance, derivatives, and worsening economic indicators.
In 2008, older traders were comparing the current meltdown with Black Monday in 1987.
On March 12, 2020, the DJIA declined 9.99%, marking the largest daily decline since Black Monday in 1987.
By September 1989, the market had regained all of the value it had lost in the 1987 crash, recovering completely in two years.
In 1995, Rosario Mantegna and Gene Stanley analyzed a million records of the S&P 500 Index, calculating the returns over a five-year period to further the study of stock price variations.
On October 9, 2007, the DJIA reached its peak of 14,164 before declining.
On September 15, 2008, the bankruptcy of Lehman Brothers and the collapse of Merrill Lynch triggered a global crisis due to exposure to subprime loans and credit default swaps.
On October 11, 2008, the head of the International Monetary Fund (IMF) warned that the world financial system was teetering on the "brink of systemic meltdown".
On October 24, 2008, many of the world's stock exchanges experienced the worst declines in their history, with drops of around 10% in most indices.
During the week of February 24-28, 2020, stock markets experienced the biggest downward weekly drop since the 2008 financial crisis.
From October 6–10, 2008, the Dow Jones Industrial Average (DJIA) fell over 1,874 points, or 18%, in its worst weekly decline ever on both a points and percentage basis.
In 2008, the meltdown was being called the Crash of 2008, being compared to Black Monday in 1987.
By March 6, 2009, the DJIA had dropped 54% to 6,469 from its peak on October 9, 2007.
In 2011, following Standard & Poor's downgrade of the United States' credit rating on August 5th, the S&P 500 plunged 6.68%, wiping out nearly $2.5 trillion in market value.
In 2011, research at the New England Complex Systems Institute found that panics leading to crashes stem from a dramatic increase in imitation among investors, which always occurred during the year before each market crash.
By the end of May 2020, the stock market indices briefly recovered to their levels at the end of February 2020.
On March 9, 2020, after the launch of the 2020 Russia–Saudi Arabia oil price war, major stock market indices fell, including the FTSE and S&P 500 Index.
On March 12, 2020, stock prices fell sharply after a travel ban from Europe was announced, with the DJIA declining 9.99% – the largest daily decline since Black Monday (1987).
On March 16, 2020, after it became clear that a recession was inevitable, the DJIA dropped 12.93%, or 2,997 points, the largest point drop since Black Monday (1987).
By the end of May 2020, the stock market indices briefly recovered to their levels at the end of February 2020.
In June 2020, the Nasdaq surpassed its pre-crash high, signaling a recovery.
During the week of February 24–28, 2020, stock markets dropped as the COVID-19 pandemic spread globally, with the FTSE 100 dropping 13% and the DJIA and S&P 500 Index dropping 11–12%.
On April 2, 2025, a major stock market crash began in the United States as a result of worldwide tariffs put in place by US President Donald Trump. This crash is the largest decline in the US stock market since the COVID-19 pandemic.
On April 9, 2025, Trade policies with 10% tariffs on all imported goods went into effect, resulting in loss of points for Dow and S&P 500.
By the second week of May 2025, the US stock market had recovered from the crash that occurred shortly after the tariffs were announced.
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