Noteworthy Wednesday Option Activity: CME, XRX, CBOE

Looking at options trading activity among components of the S&P 500 index, there is noteworthy activity today in CME Group (CME), where a total volume of 6,131 contracts has been traded thus far today, a contract volume which is representative of approximately 613,100 underlying shares (given that every 1 contract represents 100 underlying shares). That number works out to 46.5% of CME's average daily trading volume over the past month, of 1.3 million shares..