Notable Friday Option Activity: GRA, AMED, GS

Looking at options trading activity among components of the Russell 3000 index, there is noteworthy activity today in Grace & Co (GRA), where a total volume of 10,808 contracts has been traded thus far today, a contract volume which is representative of approximately 1.1 million underlying shares (given that every 1 contract represents 100 underlying shares). That number works out to 221.8% of GRA's average daily trading volume over the past month, of 487,345 shares..