Notable Monday Option Activity: GBT, AKS, BOLD

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 4,413 contracts have traded so far, representing approximately 441,300 underlying shares. That amounts to about 51.3% of GBT's average daily trading volume over the past month of 859,935 shares..