Noteworthy Monday Option Activity: STX, FB, XRAY

Looking at options trading activity among components of the S&P 500 index, there is noteworthy activity today in Seagate Technology plc (STX), where a total volume of 41,341 contracts has been traded thus far today, a contract volume which is representative of approximately 4.1 million underlying shares (given that every 1 contract represents 100 underlying shares). That number works out to 83% of STX's average daily trading volume over the past month, of 5.0 million shares..