Noteworthy Thursday Option Activity: TSRO, MRVL, AKS

Looking at options trading activity among components of the Russell 3000 index, there is noteworthy activity today in Tesaro Inc (TSRO), where a total volume of 2,802 contracts has been traded thus far today, a contract volume which is representative of approximately 280,200 underlying shares (given that every 1 contract represents 100 underlying shares). That number works out to 55.2% of TSRO's average daily trading volume over the past month, of 507,785 shares..