Looking at options trading activity among components of the Russell 3000 index, there is noteworthy activity today in Arista Networks Inc (ANET), where a total volume of 4,395 contracts has been traded thus far today, a contract volume which is representative of approximately 439,500 underlying shares (given that every 1 contract represents 100 underlying shares). That number works out to 51.9% of ANET's average daily trading volume over the past month, of 846,750 shares..