Notable Thursday Option Activity: DK, SHAK, MGLN

Looking at options trading activity among components of the Russell 3000 index, there is noteworthy activity today in Delek US Holdings Inc (DK), where a total volume of 8,164 contracts has been traded thus far today, a contract volume which is representative of approximately 816,400 underlying shares (given that every 1 contract represents 100 underlying shares). That number works out to 54% of DK's average daily trading volume over the past month, of 1.5 million shares..