Noteworthy Friday Option Activity: MACK, IBM, CCL

Among the underlying components of the Russell 3000 index, we saw noteworthy options trading volume today in Merrimack Pharmaceuticals Inc (MACK), where a total of 936 contracts have traded so far, representing approximately 93,600 underlying shares. That amounts to about 55.6% of MACK's average daily trading volume over the past month of 168,280 shares..