Exchange price limit rules for domestic stock index futures call for a quarterly reassessment of price limits based on prevailing market prices. Limits are calculated quarterly at the close of business on the day preceding the commencement of a new calendar quarter. New limits shall become effective with the commencement of Electronic Trading Hours (ETH) on Sunday October, 2, at 5:00 p.m. Central time. The revised limits shall be applicable throughout the fourth calendar quarter of 2011.
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