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CBOE Holdings reports May volume highest for 2013

CBOE Holdings reported that May trading volume for options contracts on Chicago Board Options Exchange and C2 Options Exchange and futures contracts on CBOE Futures Exchange totaled 107.14M contracts, the highest monthly volume to date in 2013. Average daily volume in May was 4.87M contracts, up 4% from 4.67M contracts in April and down 4% from 5.06M contracts in May 2012.