Flash Crash

Definition of 'Flash Crash'


The quick drop and recovery in securities prices that occurred shortly after 2:30pm Eastern Standard Time on May 6, 2010. Initial reports that the crash was caused by a mistyped order proved to be erroneous, and the causes of the flash crash remain unknown. Both the Securities and Exchange Commission (SEC) and the Commodity Futures Trading Commission (CFTC) have investigated the incident.

Investopedia explains 'Flash Crash'


The SEC and CFTC released a preliminary report on the flash crash incident on May 18, 2010. The report gave several working hypotheses, but failed to identify a single cause for the incident. Securities exchanges canceled 21,000 trades that were executed at unexpectedly low prices during the crash. On June 10, 2010, the SEC voted unanimously to enact new rules which automatically stop trading for any stock in the S&P 500 whose price changes by more than 10% in any five-minute period.



comments powered by Disqus
Hot Definitions
  1. Ascending Triangle

    A bullish chart pattern used in technical analysis that is easily recognizable by the distinct shape created by two trendlines. In an ascending triangle, one trendline is drawn horizontally at a level that has historically prevented the price from heading higher, while the second trendline connects a series of increasing troughs.
  2. National Best Bid and Offer - NBBO

    A term applying to the SEC requirement that brokers must guarantee customers the best available ask price when they buy securities and the best available bid price when they sell securities.
  3. Maintenance Margin

    The minimum amount of equity that must be maintained in a margin account. In the context of the NYSE and FINRA, after an investor has bought securities on margin, the minimum required level of margin is 25% of the total market value of the securities in the margin account.
  4. Leased Bank Guarantee

    A bank guarantee that is leased to a third party for a specific fee. The issuing bank will conduct due diligence on the creditworthiness of the customer looking to secure a bank guarantee, then lease a guarantee to that customer for a set amount of money and over a set period of time, typically less than two years.
  5. Degree Of Financial Leverage - DFL

    A ratio that measures the sensitivity of a company’s earnings per share (EPS) to fluctuations in its operating income, as a result of changes in its capital structure. Degree of Financial Leverage (DFL) measures the percentage change in EPS for a unit change in earnings before interest and taxes (EBIT).
  6. Jeff Bezos

    Self-made billionaire Jeff Bezos is famous for founding online retail giant Amazon.com.
Trading Center