Fat-finger error halts yen trading on CME

Out-of-the-market stop loss triggers temporary trading pause

A man with a hammer and fat fingers

A fat-finger error in Japanese futures contracts caused the CME to pause trading on June 25 after a large out-of-the-market stop order triggered a temporary shutdown on the exchange following a human order that one market participant described as a "guaranteed disaster".

The exchange confirmed that it halted trading for 5 seconds, in a so-called stop-logic event, to allow the large order to be filled in a procedure that is activated when there is a lack of liquidity at the price where the order

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