Looking at options trading activity among components of the Russell 3000 index, there is noteworthy activity today in SI-BONE Inc (SIBN), where a total volume of 7,417 contracts has been traded thus far today, a contract volume which is representative of approximately 741,700 underlying shares (given that every 1 contract represents 100 underlying shares). That number works out to 197.9% of SIBN's average daily trading volume over the past month, of 374,720 shares..