Companhia Siderurgica Nacional Jan 19, 2026 at 9:24 PM UTC OriginalELI5 S&P downgrades Brazil's CSN to 'B+' from 'BB-'; outlook negative Companhia Siderurgica Nacional SA BMFBOVESPA:CSNA3:S&P DOWNGRADES CSN TO 'B+'; OUTLOOK NEGATIVE