Merrimack Pharmaceuticals, Inc. (NASDAQ:MACK – Get Rating)’s stock price passed above its 200-day moving average during trading on Wednesday . The stock has a 200-day moving average of $5.46 and traded as high as $5.89. Merrimack Pharmaceuticals shares last traded at $5.68, with a volume of 7,552 shares. Separately, StockNews.com started coverage on Merrimack Pharmaceuticals […]