Notable Tuesday Option Activity: PTCT, XPO, CHRW

Looking at options trading activity among components of the Russell 3000 index, there is noteworthy activity today in PTC Therapeutics Inc (PTCT), where a total volume of 11,661 contracts has been traded thus far today, a contract volume which is representative of approximately 1.2 million underlying shares (given that every 1 contract represents 100 underlying shares). That number works out to 153% of PTCT's average daily trading volume over the past month, of 762,360 shares..