Looking at options trading activity among components of the Russell 3000 index, there is noteworthy activity today in Palo Alto Networks, Inc (PANW), where a total volume of 28,329 contracts has been traded thus far today, a contract volume which is representative of approximately 2.8 million underlying shares (given that every 1 contract represents 100 underlying shares). That number works out to 145.8% of PANW's average daily trading volume over the past month, of 1.9 million shares..