Which 2010 market event saw U.S. stocks plunge and recover within minutes?

The 2010 market event in which U.S. stocks plunged and recovered within minutes was the Flash Crash.

On May 6, 2010, major U.S. equity indexes dropped rapidly before recovering much of the decline. The Dow Jones Industrial Average fell about 1,000 points, or roughly 9 percent, during the session, and many individual securities briefly traded at extraordinarily low prices.

Investigations found that automated trading and severe liquidity conditions interacted during the episode. A large sell order in E-mini S&P 500 futures contributed to pressure, while high-frequency trading and fragmented markets helped accelerate price movements. The exact sequence involved several interacting factors rather than one simple cause.

The U.S. Securities and Exchange Commission and Commodity Futures Trading Commission later described the event in a joint report. The episode encouraged new safeguards, including market-wide circuit breakers and rules addressing clearly erroneous trades. It differed from a conventional multi-day market crash because the most dramatic movements occurred within minutes.