Looking at options trading activity among components of the Russell 3000 index, there is noteworthy activity today in RAPT Therapeutics Inc (RAPT), where a total volume of 2,505 contracts has been traded thus far today, a contract volume which is representative of approximately 250,500 underlying shares (given that every 1 contract represents 100 underlying shares). That number works out to 52.8% of RAPT's average daily trading volume over the past month, of 474,525 shares..