StockNews.com cut shares of Merrimack Pharmaceuticals (NASDAQ:MACK – Free Report) from a hold rating to a sell rating in a research report released on Monday morning. Merrimack Pharmaceuticals Trading Up 0.1 % Merrimack Pharmaceuticals stock opened at $15.13 on Monday. The firm has a market capitalization of $219.84 million, a P/E ratio of -189.13 and […]