Noteworthy Thursday Option Activity: HGEN, KRYS, SAM

Looking at options trading activity among components of the Russell 3000 index, there is noteworthy activity today in Humanigen Inc (HGEN), where a total volume of 44,814 contracts has been traded thus far today, a contract volume which is representative of approximately 4.5 million underlying shares (given that every 1 contract represents 100 underlying shares). That number works out to 521% of HGEN's average daily trading volume over the past month, of 860,180 shares..