Notable Thursday Option Activity: OSIR, UTHR, FIZZ

Looking at options trading activity among components of the Russell 3000 index, there is noteworthy activity today in Osiris Therapeutics Inc (OSIR), where a total volume of 1,040 contracts has been traded thus far today, a contract volume which is representative of approximately 104,000 underlying shares (given that every 1 contract represents 100 underlying shares). That number works out to 112.8% of OSIR's average daily trading volume over the past month, of 92,220 shares..