Notable Thursday Option Activity: HALO, TIF, WDC

Looking at options trading activity among components of the Russell 3000 index, there is noteworthy activity today in Halozyme Therapeutics Inc (HALO), where a total volume of 7,292 contracts has been traded thus far today, a contract volume which is representative of approximately 729,200 underlying shares (given that every 1 contract represents 100 underlying shares). That number works out to 52.9% of HALO's average daily trading volume over the past month, of 1.4 million shares..