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 1,240 contracts has been traded thus far today, a contract volume which is representative of approximately 124,000 underlying shares (given that every 1 contract represents 100 underlying shares). That number works out to 53.4% of MED's average daily trading volume over the past month, of 232,030 shares..