Constellium (NYSE:CSTM – Get Free Report) was downgraded by equities research analysts at Zacks Research from a “hold” rating to a “strong sell” rating in a research note issued on Thursday,Zacks.com reports. Separately, Weiss Ratings reiterated a “sell (d+)” rating on shares of Constellium in a report on Saturday, September 27th. Three analysts have rated the stock with a Buy rating and two have given a Sell rating to the stock. Get Constellium alerts:Read Our Latest Stock Analysis on CSTMConstellium Stock Up 0.2%Shares of Constellium stock opened at $15.47 on Thursday. The industrial products company reported $0.25 earnings per share (EPS) for the quarter, missing the consensus estimate of $0.28 by ($0.03).