Investors interested in stocks from the Steel - Producers sector have probably already heard of Posco (PKX) and Siderurgica Nacional (SID) . But which of these two stocks presents investors with the better value opportunity right now? Let's take a closer look. Right now, Posco is sporting a Zacks Rank of #2 (Buy), while Siderurgica Nacional has a Zacks Rank of #4 (Sell). The Zacks Rank favors stocks that have recently seen positive revisions to their earnings estimates, so investors should rest assured that ...