Fitch Downgrades Alcoa Aluminio's IDRs to 'BBB-'; Withdraws Ratings

CHICAGO--(Business Wire)-- Fitch Ratings has downgraded and simultaneously withdrawn the following ratings for Alcoa Aluminio S.A. (Aluminio): --Local currency Issuer Default Rating (IDR) to 'BBB-' from 'BBB'; --Foreign currency IDR to 'BBB-' from...