Companhia Siderúrgica Nacional (NYSE: SID ), also known under the acronym "CSN", is one of the largest steel producers in Brazil, as well as the second largest iron ore producer, behind the giant Vale SA ( VALEEquity Research Analyst at DM Martins Research.The best opportunities often don’t scream for attention. I cover stocks that are often undercovered, focusing primarily on Brazil and Latin America — but I also occasionally write about global large caps. My work can also be found on TipRanks, where I con ...