A flash crash is a very rapid, deep, and volatile fall in security prices occurring within an extremely short time period. A flash crash frequently stems from trades executed by black-box trading , combined with high-frequency trading , whose speed and interconnectedness can result in the loss and recovery of billions of dollars in a matter of minutes and seconds.

Flash crash occurs when there is a very rapid, deep, and volatile fall in security or financial instrument prices within an extremely short time period.

Four notable [ according to whom? This type of event occurred on May 6, The mechanism causing the event has been heavily researched and is in dispute. On April 21, , the U.

Department of Justice laid "22 criminal counts, including fraud and market manipulation" against Navinder Singh Sarao , a trader. Among the charges included was the use of spoofing algorithms.

On April 23, , the AP 's Twitter account was hacked to release a hoax tweet about fictional attacks in the White House that left President Obama injured. It was the pound's lowest level against the dollar since May The pound recovered much of its value in the next few minutes, but ended down on the day's trading, most likely due to market concerns about the impact of a " hard Brexit "—a more complete break with the European Union following Britain's 'Leave' referendum vote in June.

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It was initially speculated that the flash crash may have been due to a fat finger trader error or an algorithm reacting to negative news articles about the British Government's European policy. The crash resulted in new regulations being announced in August Minimum trading prices of 0. The exchange said the measures were to curb excessive speculation and potential share price manipulation.

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From Wikipedia, the free encyclopedia. Not to be confused with Flash Crash of AP Tweet Flash Crash of What Investors Should Know About Fintech, High-Frequency Trading and Flash Crashes.

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