Notable Thursday Option Activity: AGEN, TWTR, RTRX

Among the underlying components of the Russell 3000 index, we saw noteworthy options trading volume today in Agenus Inc (AGEN), where a total of 9,287 contracts have traded so far, representing approximately 928,700 underlying shares. That amounts to about 87.1% of AGEN's average daily trading volume over the past month of 1.1 million shares..