Notable Tuesday Option Activity: ISRG, GIS, USB
January 17, 2017 at 14:18 PM EST
Looking at options trading activity among components of the S&P 500 index, there is noteworthy activity today in Intuitive Surgical Inc (ISRG), where a total volume of 1,558 contracts has been traded thus far today, a contract volume which is representative of approximately 155,800 underlying shares (given that every 1 contract represents 100 underlying shares). That number works out to 49.3% of ISRG's average daily trading volume over the past month, of 316,140 shares..