Regulatory Circulars

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March 05, 2015:   RG15-038 Annual Supervision-Related Reporting Pursuant to CBOE/C2 Rules 4.24 and 9.8 
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March 05, 2015:   RG15-037 Publication of Expected Opening Price/Size and Imbalance Information on Volatility Index Options and Futures Settlement Days 
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March 03, 2015:   RG15-036 Bid-Ask Differentials and Minimum Quote Size 
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March 03, 2015:   RG15-035 Restrictions on Transactions in Ivanhoe Energy, Inc. (IVAN) 
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March 03, 2015:   RG15-034 Restrictions on Transactions in BPZ Resources, Inc. (BPZ) 
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March 02, 2015:   RG15-033 Additional Extended Trading Hours Session Testing 
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February 27, 2015:   RG15-032 Give Up of Clearing Trading Permit Holders for Extended Trading Hours 
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February 27, 2015:   RG15-031 Changes to Fee Schedule 
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February 26, 2015:   RG15-030 Extended Trading Hours Session Testing 
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February 26, 2015:   RG15-029 Operational Settings for Extended Trading Hours Session - Updated 
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