Noteworthy Tuesday Option Activity: OA, AZO, TSRO

Looking at options trading activity among components of the Russell 3000 index, there is noteworthy activity today in Orbital ATK Inc (OA), where a total volume of 1,875 contracts has been traded thus far today, a contract volume which is representative of approximately 187,500 underlying shares (given that every 1 contract represents 100 underlying shares). That number works out to 53.8% of OA's average daily trading volume over the past month, of 348,445 shares..