Noteworthy Thursday Option Activity: GBT, TDOC, ODT

Among the underlying components of the Russell 3000 index, we saw noteworthy options trading volume today in Global Blood Therapeutics Inc (GBT), where a total of 9,200 contracts have traded so far, representing approximately 920,000 underlying shares. That amounts to about 161.8% of GBT's average daily trading volume over the past month of 568,730 shares..