Noteworthy Monday Option Activity: IBKR, PXD, REGN

Looking at options trading activity among components of the Russell 3000 index, there is noteworthy activity today in Interactive Brokers Group Inc (IBKR), where a total volume of 1,489 contracts has been traded thus far today, a contract volume which is representative of approximately 148,900 underlying shares (given that every 1 contract represents 100 underlying shares). That number works out to 40.5% of IBKR's average daily trading volume over the past month, of 367,900 shares..