Notable Monday Option Activity: TNDM, ETSY, ADVM

Looking at options trading activity among components of the Russell 3000 index, there is noteworthy activity today in Tandem Diabetes Care Inc (TNDM), where a total volume of 7,328 contracts has been traded thus far today, a contract volume which is representative of approximately 732,800 underlying shares (given that every 1 contract represents 100 underlying shares). That number works out to 57.4% of TNDM's average daily trading volume over the past month, of 1.3 million shares..