Looking at options trading activity among components of the Russell 3000 index, there is noteworthy activity today in Maplebear Inc (CART), where a total volume of 21,615 contracts has been traded thus far today, a contract volume which is representative of approximately 2.2 million underlying shares (given that every 1 contract represents 100 underlying shares). That number works out to 81% of CART's average daily trading volume over the past month, of 2.7 million shares..