Notable Thursday Option Activity: ARA, DVAX, MDRX

Among the underlying components of the Russell 3000 index, we saw noteworthy options trading volume today in American Renal Associates Holdings Inc (ARA), where a total of 446 contracts have traded so far, representing approximately 44,600 underlying shares. That amounts to about 63.6% of ARA's average daily trading volume over the past month of 70,175 shares..