Looking at options trading activity among components of the Russell 3000 index, there is noteworthy activity today in US Concrete Inc (USCR), where a total volume of 3,589 contracts has been traded thus far today, a contract volume which is representative of approximately 358,900 underlying shares (given that every 1 contract represents 100 underlying shares). That number works out to 84.1% of USCR's average daily trading volume over the past month, of 426,760 shares..