Noteworthy Thursday Option Activity: UAL, NSC, AAL

Looking at options trading activity among components of the S&P 500 index, there is noteworthy activity today in United Airlines Holdings Inc (UAL), where a total volume of 46,753 contracts has been traded thus far today, a contract volume which is representative of approximately 4.7 million underlying shares (given that every 1 contract represents 100 underlying shares). That number works out to 83.5% of UAL's average daily trading volume over the past month, of 5.6 million shares..