Notable Friday Option Activity: BLK, SNA, ISRG
January 17, 2020 at 13:45 PM EST
Looking at options trading activity among components of the S&P 500 index, there is noteworthy activity today in Blackrock Inc (BLK), where a total volume of 5,323 contracts has been traded thus far today, a contract volume which is representative of approximately 532,300 underlying shares (given that every 1 contract represents 100 underlying shares). That number works out to 104.5% of BLK's average daily trading volume over the past month, of 509,365 shares..