Notable Thursday Option Activity: TBRA, CRUS, BCOR

Looking at options trading activity among components of the Russell 3000 index, there is noteworthy activity today in Tobira Therapeutics Inc (TBRA), where a total volume of 1,565 contracts has been traded thus far today, a contract volume which is representative of approximately 156,500 underlying shares (given that every 1 contract represents 100 underlying shares). That number works out to 76.7% of TBRA's average daily trading volume over the past month, of 204,035 shares..