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 7,300 contracts has been traded thus far today, a contract volume which is representative of approximately 730,000 underlying shares (given that every 1 contract represents 100 underlying shares). That number works out to 87.7% of ALGN's average daily trading volume over the past month, of 832,685 shares..