NEW YORK--(BUSINESS WIRE)--Brazil's continued economic underperformance led non-financial corporate (corporate) downgrades to outpace upgrades during the second quarter 2015, according to Fitch Ratings. For 2Q15, corporate downgrades exceeded upgrades by 2.5 to 1.0. The downgrade-to-upgrade ratio attributed to changes in the operating/industry profile was 1.7 to 1.0 (1.4 for the six months ending June 2015). Brazilian issuers drove 28% of corporatewide and 83% of Latin American corporate downgr