Looking at options trading activity among components of the Russell 3000 index, there is noteworthy activity today in Aldeyra Therapeutics Inc (ALDX), where a total volume of 1,768 contracts has been traded thus far today, a contract volume which is representative of approximately 176,800 underlying shares (given that every 1 contract represents 100 underlying shares). That number works out to 75.9% of ALDX's average daily trading volume over the past month, of 233,055 shares..