Looking at options trading activity among components of the Russell 3000 index, there is noteworthy activity today in Arconic Corp (ARNC), where a total volume of 3,439 contracts has been traded thus far today, a contract volume which is representative of approximately 343,900 underlying shares (given that every 1 contract represents 100 underlying shares). That number works out to 41.3% of ARNC's average daily trading volume over the past month, of 833,395 shares..