Noteworthy Friday Option Activity: RST, AMBC, CTRL

Looking at options trading activity among components of the Russell 3000 index, there is noteworthy activity today in Rosetta Stone, Inc. (RST), where a total volume of 2,579 contracts has been traded thus far today, a contract volume which is representative of approximately 257,900 underlying shares (given that every 1 contract represents 100 underlying shares)..