The Commodity Futures Trading Commission has told US market participants to ensure that they comply with position limits on significant price discovery contracts at all times during the day, rather than just at the end of the day.
The clarification came just one day after the record for the largest number of option contracts traded in a single day was broken, and two days after the suspicious market activity of May 6, rumoured to have been triggered by an erroneous trade or glitch by a US bank.
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