Looking at options trading activity among components of the Russell 3000 index, there is noteworthy activity today in GasLog Ltd (GLOG), where a total volume of 2,020 contracts has been traded thus far today, a contract volume which is representative of approximately 202,000 underlying shares (given that every 1 contract represents 100 underlying shares). That number works out to 63.6% of GLOG's average daily trading volume over the past month, of 317,820 shares..