What is a stock market crash, and how often do they happen?
A sudden, steep drop, usually 20 percent or more in a short period. Real crashes happen roughly once a decade; the market has recovered from every one so far, though recovery has sometimes taken years.
A crash is a sharp, fast fall in prices, the kind that makes the evening news. There is no official threshold, but people usually mean a drop of 20 percent or more over days or weeks, rather than a slow slide. 1929, 1987, 2008 and March 2020 are the ones everyone cites.
They are rarer than the headlines make it feel. Drops of 10 percent happen most years and are called corrections. Drops of 20 percent, bear markets, arrive every five or six years on average. True crashes, where the fall is both large and abrupt, come around once a decade or so.
What happens afterwards is the part that gets less coverage. The US market has recovered its previous high after every crash in its history. Sometimes that took months, as in 2020. Sometimes it took years, as after 2000 and 2008. Either way, an investor who kept holding and kept buying came out ahead, and one who sold at the bottom locked in the loss.
The practical preparation is not predicting the next one, which nobody has done reliably. It is holding only money you will not need for years, so that when a crash arrives you can afford to wait it out.
Informational only, not financial advice. Updated September 4, 2026.
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