Siderurgica Nacional (SID) Stock Sinks As Market Gains: What You Should Know Posted byZacks Equity Research August 30, 2021 Leave a comment on Siderurgica Nacional (SID) Stock Sinks As Market Gains: What You Should Know Siderurgica Nacional (SID) closed at $7.05 in the latest trading session, marking a -1.95% move from the prior day.