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 8,550 contracts has been traded thus far today, a contract volume which is representative of approximately 855,000 underlying shares (given that every 1 contract represents 100 underlying shares). That number works out to 100.3% of GRPN's average daily trading volume over the past month, of 852,340 shares..