Looking at options trading activity among components of the Russell 3000 index, there is noteworthy activity today in AnaptysBio Inc (ANAB), where a total volume of 4,121 contracts has been traded thus far today, a contract volume which is representative of approximately 412,100 underlying shares (given that every 1 contract represents 100 underlying shares). That number works out to 152.1% of ANAB's average daily trading volume over the past month, of 270,975 shares..