CBOE Holdings Reports September 2011 Trading Volume; Average Daily Volume up 31%

CBOE Holdings, Inc.

today reported that September trading volume for options on the Chicago Board Options Exchange and C2 Options Exchange, the company's all-electronic market, combined, totaled 104.2 million contracts. Average daily volume was 5.0 million contracts, an increase of 31 percent from September 2010's ADV of 3.8 million contracts per day. CBOE Holdings total options trading volume during the third quarter of 2011 was 346.8 million contracts, an increase of 46 percent from 237.4 million total options contracts during the third quarter of 2010. Third quarter average daily volume rose 46 percent to 5.4 million options contracts, up from 3.7 million options contracts per day during the third quarter of 2010.