Noteworthy Tuesday Option Activity: IRWD, SRG, CXW

Looking at options trading activity among components of the Russell 3000 index, there is noteworthy activity today in Ironwood Pharmaceuticals Inc (IRWD), where a total volume of 8,308 contracts has been traded thus far today, a contract volume which is representative of approximately 830,800 underlying shares (given that every 1 contract represents 100 underlying shares). That number works out to 81.8% of IRWD's average daily trading volume over the past month, of 1.0 million shares..