Notable Thursday Option Activity: GRA, OMER, DVAX
May 10, 2018 at 15:27 PM EDT
Looking at options trading activity among components of the Russell 3000 index, there is noteworthy activity today in Grace & Co (GRA), where a total volume of 4,985 contracts has been traded thus far today, a contract volume which is representative of approximately 498,500 underlying shares (given that every 1 contract represents 100 underlying shares). That number works out to 40.7% of GRA's average daily trading volume over the past month, of 1.2 million shares..