Noteworthy Friday Option Activity: CBLK, RDUS, ESNT

Looking at options trading activity among components of the Russell 3000 index, there is noteworthy activity today in Carbon Black Inc (CBLK), where a total volume of 3,108 contracts has been traded thus far today, a contract volume which is representative of approximately 310,800 underlying shares (given that every 1 contract represents 100 underlying shares). That number works out to 45.3% of CBLK's average daily trading volume over the past month, of 686,195 shares..