Open main menu


Alternative formsEdit


From the idea that a finger that is too fat (big) is likely to strike keys other than the intended one.


fat finger (plural fat fingers)

  1. A supposed cause of typographical errors, especially keyboard errors that cause erroneous trades to be executed in the financial markets.
    • 2006, James Quinn, “LSE moves to nail 'fat finger' deals”, in
      The London Stock Exchange is to enhance the measures it has in place to ensure 'fat finger' trades do not occur.
    • 2010 May 7, “'Fat fingers' could be behind market crash”, in
      Although it appeared to be triggered by unrest in Greece, the real cause could be a trader's "fat fingers."
    • 2010 May 7, “Fear itself the problem as Greece's woes have yet to spread”, in Sydney Morning Herald:
      The Securities and Exchange Commission is on the case, pursuing a lead that a "fat finger" keystroke error on a trade in Procter & Gamble, one of the 30 stocks in the Dow Jones Industrial Average, turned a trade of millions into a trade of billions