Looking at options trading activity among components of the Russell 3000 index, there is noteworthy activity today in CRH plc (CRH), where a total volume of 21,433 contracts has been traded thus far today, a contract volume which is representative of approximately 2.1 million underlying shares (given that every 1 contract represents 100 underlying shares). That number works out to 64.7% of CRH's average daily trading volume over the past month, of 3.3 million shares..