CME Group, the world’s biggest futures exchange, mistakenly placed orders on active energy and metals markets as it was undertaking a quality assurance procedure on Monday afternoon.
CME declined to say which contracts were placed into the live market or how many orders were sent or executed, but a person familiar with the situation numbered them in the tens of thousands.
The mistaken order flow began at 3:38pm Eastern time on Monday and lasted six minutes. CME said the erroneous orders had no impact on prices.
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