Notable Monday Option Activity: TDG, TWTR, REGN
July 09, 2018 at 13:40 PM EDT
Looking at options trading activity among components of the S&P 500 index, there is noteworthy activity today in TransDigm Group Inc (TDG), where a total volume of 5,163 contracts has been traded thus far today, a contract volume which is representative of approximately 516,300 underlying shares (given that every 1 contract represents 100 underlying shares). That number works out to 146.7% of TDG's average daily trading volume over the past month, of 351,890 shares..