CSN Mineração cuts 2026 iron ore output target, raises cash cost after plant slowdown

CSN Mineração revised its 2026 iron ore production guidance down to 39-41 Mt from 45-47 Mt and raised C1 cash cost guidance to US$25-26/t from US$22/t, following a temporary reduction at its dry beneficiation plant at Pires Complex in Ouro Preto, MG. The revision signals operational constraints and higher unit costs, which may pressure margins and weigh on the company's equity and sector sentiment.