Noteworthy Friday Option Activity: NRG, MS, AFL

Looking at options trading activity among components of the S&P 500 index, there is noteworthy activity today in NRG Energy Inc (NRG), where a total volume of 12,908 contracts has been traded thus far today, a contract volume which is representative of approximately 1.3 million underlying shares (given that every 1 contract represents 100 underlying shares). That number works out to 41.9% of NRG's average daily trading volume over the past month, of 3.1 million shares..