Notable Thursday Option Activity: COLM, AMZN, TWTR

Looking at options trading activity among components of the Russell 3000 index, there is noteworthy activity today in Columbia Sportswear Co. (COLM), where a total volume of 9,829 contracts has been traded thus far today, a contract volume which is representative of approximately 982,900 underlying shares (given that every 1 contract represents 100 underlying shares)..