Regulatory Circulars

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March 26, 2015:   RG15-048 Sponsored User Program Applicability During CBOE Extended Trading Hours 
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March 23, 2015:   RG15-047 Operational Settings for Options on the Russell 2000 Index (RUT) 
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March 20, 2015:   RG15-046 Restrictions on Transactions in SIGA Technologies Inc. (SIGA) 
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March 18, 2015:   RG15-045 Russell 2000 Index Options (RUT) Fees 
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March 16, 2015:   RG15-044 Extended Trading Hours Session on VIX Settlement Days 
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March 16, 2015:   RG15-043 Operational Settings for Extended Trading Hours Session - Updated 
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March 11, 2015:   RG15-042 Restrictions on Transactions in Hyperdynamics Corp. (HDY) 
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March 10, 2015:   RG15-041 Restrictions on Transactions in Allied Nevada Gold, Corp. (ANV) 
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March 10, 2015:   RG15-040 Good Friday Holiday Closure Impact on VXST Option Contract Expiring on March 24, 2015 
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March 09, 2015:   RG15-039 Anti-Money Laundering Compliance Program Filing Requirements for Certain Trading Permit Holders 
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