Notable Thursday Option Activity: ECOL, RH, ZM

Among the underlying components of the Russell 3000 index, we saw noteworthy options trading volume today in US Ecology Inc (ECOL), where a total of 4,003 contracts have traded so far, representing approximately 400,300 underlying shares. That amounts to about 231.8% of ECOL's average daily trading volume over the past month of 172,655 shares..