Looking at options trading activity among components of the Russell 3000 index, there is noteworthy activity today in Aerojet Rocketdyne Holdings Inc (AJRD), where a total volume of 3,110 contracts has been traded thus far today, a contract volume which is representative of approximately 311,000 underlying shares (given that every 1 contract represents 100 underlying shares). That number works out to 72.4% of AJRD's average daily trading volume over the past month, of 429,680 shares..