Notable Wednesday Option Activity: ISRG, PEP, CAT

Looking at options trading activity among components of the S&P 500 index, there is noteworthy activity today in Intuitive Surgical Inc (NASD: ISRG), where a total volume of 3,438 contracts has been traded thus far today, a contract volume which is representative of approximately 343,800 underlying shares (given that every 1 contract represents 100 underlying shares). That number works out to 88.9% of ISRG's average daily trading volume over the past month, of 386,780 shares. Particularly high v...