Looking at options trading activity among components of the Russell 3000 index, there is noteworthy activity today in Biohaven Pharmaceutical Holding Co Ltd (BHVN), where a total volume of 2,425 contracts has been traded thus far today, a contract volume which is representative of approximately 242,500 underlying shares (given that every 1 contract represents 100 underlying shares). That number works out to 57.9% of BHVN's average daily trading volume over the past month, of 419,175 shares..