Merrimack Pharmaceuticals, Inc. (NASDAQ:MACK – Get Free Report) shares passed above its 200-day moving average during trading on Thursday . The stock has a 200-day moving average of $12.40 and traded as high as $13.39. Merrimack Pharmaceuticals shares last traded at $13.32, with a volume of 36,749 shares. Analyst Ratings Changes Separately, StockNews.com upgraded shares […]