Noteworthy Friday Option Activity: RDUS, GBT, MTW

Looking at options trading activity among components of the Russell 3000 index, there is noteworthy activity today in Radius Health Inc (RDUS), where a total volume of 5,332 contracts has been traded thus far today, a contract volume which is representative of approximately 533,200 underlying shares (given that every 1 contract represents 100 underlying shares). That number works out to 61.1% of RDUS's average daily trading volume over the past month, of 872,845 shares..