Looking at options trading activity among components of the Russell 3000 index, there is noteworthy activity today in Groupon Inc (GRPN), where a total volume of 6,781 contracts has been traded thus far today, a contract volume which is representative of approximately 678,100 underlying shares (given that every 1 contract represents 100 underlying shares). That number works out to 113.4% of GRPN's average daily trading volume over the past month, of 598,055 shares..