Looking at options trading activity among components of the Russell 3000 index, there is noteworthy activity today in Laboratory Corporation of America Holdings (LH), where a total volume of 8,657 contracts has been traded thus far today, a contract volume which is representative of approximately 865,700 underlying shares (given that every 1 contract represents 100 underlying shares). That number works out to 155.3% of LH's average daily trading volume over the past month, of 557,375 shares..