Looking at options trading activity among components of the Russell 3000 index, there is noteworthy activity today in Scholar Rock Holding Corp (SRRK), where a total volume of 25,130 contracts has been traded thus far today, a contract volume which is representative of approximately 2.5 million underlying shares (given that every 1 contract represents 100 underlying shares). That number works out to 250.8% of SRRK's average daily trading volume over the past month, of 1.0 million shares..