Looking at options trading activity among components of the Russell 3000 index, there is noteworthy activity today in Stratasys, Ltd. (NASD: SSYS), where a total volume of 4,822 contracts has been traded thus far today, a contract volume which is representative of approximately 482,200 underlying shares (given that every 1 contract represents 100 underlying shares). That number works out to 50.6% of SSYS’s average daily trading volume over the past month, of 952,575 shares.