Looking at options trading activity among components of the Russell 3000 index, there is noteworthy activity today in Clearfield Inc (CLFD), where a total volume of 568 contracts has been traded thus far today, a contract volume which is representative of approximately 56,800 underlying shares (given that every 1 contract represents 100 underlying shares). That number works out to 44.7% of CLFD's average daily trading volume over the past month, of 127,145 shares..