Stock Market Crash Of 1987


Stock Market Crash Of 1987
A rapid and severe downturn in stock prices that occurred in late October of 1987. After five days of intensifying stock market declines, selling pressure hit a peak on October 19, known as Black Monday. The Dow Jones Industrial Average (DJIA) fell a record 22% on that day alone, with many stocks halted during the day as order imbalances prevented true price discovery.

People speculate on the exact causes of the crash, which was rare in that the market made up most of its losses rather quickly, rather than preceding a protracted economic recession. Some people point to the lack of trading curbs, which markets have today, and automatic trading programs in place at the time as possible culprits.

The lead-up to October 1987 saw the DJIA more than triple in five years, and price/earnings (P/E) multiples on stocks had reached above 20, implying very bullish sentiment. And while the crash began as a U.S. phenomenon, it quickly affected stock markets around the globe; 19 of the 20 largest markets in the world saw stock market declines of 20% or more.

Investors and regulators learned a lot from the 1987 crash, specifically with regards to the dangers of automatic or program trading. In these types of programs, human decision-making is taken out of the equation, and buy or sell orders are generated automatically based on the levels of benchmark indexes or specific stocks. In a disorderly market, humans are needed more than ever to assess the situation and possibly override imprudent market thresholds.


Investment dictionary. . 2012.

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