Notable Tuesday Option Activity: NRG, COP, MNK

Among the underlying components of the S&P 500 index, we saw noteworthy options trading volume today in NRG Energy Inc (NRG), where a total of 35,383 contracts have traded so far, representing approximately 3.5 million underlying shares. That amounts to about 84.8% of NRG's average daily trading volume over the past month of 4.2 million shares..