On Thursday, December 15, 2016, and pending final regulatory approval, CME Clearing will introduce “options fungibility” for positions in End of Month and Weekly S&P 500 options on futures. This change will allow option positions in the mini and corresponding standard size option products to offset one another in the same way that futures positions do today. The E-mini S&P 500 End of Month Options (EW) and the standard sized S&P 500 End of Month Options (EV) will be eligible for the fungible offset service, together with the corresponding Wednesday and Friday weekly expirations.
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