During the 2010 Flash Crash, how many Dow points were lost intraday at the low?

The Dow lost nearly 1,000 points intraday at the low during the 2010 Flash Crash.

On May 6, 2010, the Dow Jones Industrial Average plunged about 998.5 points from its previous close before recovering much of the loss. The dramatic fall and rebound occurred within minutes, making it one of the most striking episodes in modern electronic-market history.

Investigations found that a large automated sell order, combined with stressed market conditions and high-frequency trading activity, helped amplify the move. The U.S. Securities and Exchange Commission and Commodity Futures Trading Commission later described mechanisms through which selling pressure spread rapidly among markets.

The event led to reforms including circuit breakers and rules for handling clearly erroneous trades. It is distinct from a conventional prolonged crash because prices recovered much of the decline on the same day.