Looking at options trading activity among components of the Russell 3000 index, there is noteworthy activity today in Medifast Inc (MED), where a total volume of 796 contracts has been traded thus far today, a contract volume which is representative of approximately 79,600 underlying shares (given that every 1 contract represents 100 underlying shares). That number works out to 54.1% of MED's average daily trading volume over the past month, of 147,215 shares..