Notable Thursday Option Activity: WRK, DPZ, ISRG

Looking at options trading activity among components of the S&P 500 index, there is noteworthy activity today in WestRock Co (WRK), where a total volume of 22,930 contracts has been traded thus far today, a contract volume which is representative of approximately 2.3 million underlying shares (given that every 1 contract represents 100 underlying shares). That number works out to 96.7% of WRK's average daily trading volume over the past month, of 2.4 million shares..