Noteworthy Tuesday Option Activity: NRG, XLNX, COST

Looking at options trading activity among components of the S&P 500 index, there is noteworthy activity today in NRG Energy Inc (NYSE: NRG), where a total volume of 28,001 contracts has been traded thus far today, a contract volume which is representative of approximately 2.8 million underlying shares (given that every 1 contract represents 100 underlying shares). That number works out to 51.3% of NRG's average daily trading volume over the past month, of 5.5 million shares. Particularly high vo...