Notable Tuesday Option Activity: GBT, SFM, CROX
January 09, 2018 at 15:21 PM EST
Looking at options trading activity among components of the Russell 3000 index, there is noteworthy activity today in Global Blood Therapeutics Inc (GBT), where a total volume of 6,399 contracts has been traded thus far today, a contract volume which is representative of approximately 639,900 underlying shares (given that every 1 contract represents 100 underlying shares). That number works out to 43.1% of GBT's average daily trading volume over the past month, of 1.5 million shares..