Noteworthy Thursday Option Activity: KPTI, COH, WFM

Looking at options trading activity among components of the Russell 3000 index, there is noteworthy activity today in Karyopharm Therapeutics Inc (KPTI), where a total volume of 1,073 contracts has been traded thus far today, a contract volume which is representative of approximately 107,300 underlying shares (given that every 1 contract represents 100 underlying shares). That number works out to 42.5% of KPTI's average daily trading volume over the past month, of 252,695 shares..