Notable Thursday Option Activity: NPO, MFRM, VAC

Among the underlying components of the Russell 3000 index, we saw noteworthy options trading volume today in EnPro Industries Inc (NPO), where a total of 2,101 contracts have traded so far, representing approximately 210,100 underlying shares. That amounts to about 190.4% of NPO's average daily trading volume over the past month of 110,365 shares..