Looking at options trading activity among components of the Russell 3000 index, there is noteworthy activity today in Align Technology Inc (ALGN), where a total volume of 3,539 contracts has been traded thus far today, a contract volume which is representative of approximately 353,900 underlying shares (given that every 1 contract represents 100 underlying shares). That number works out to 53.5% of ALGN's average daily trading volume over the past month, of 662,070 shares..