SAO PAULO & NEW YORK--(BUSINESS WIRE)--Fitch Ratings has upgraded Tonon Bioenergia S.A's (Tonon) foreign and local currency Issuer Default Ratings (IDRs) to 'CC' from 'RD'. At the same time, Fitch has assigned a 'CC/RR4' rating to the USD289 million unsecured notes due 2020 (effective July 29, 2015), and upgraded the rating on the remaining USD11 million senior unsecured notes due 2020 and USD230 million senior secured notes due 2024 to 'CC/RR4' from 'C/RR4'. All related debts have been issued


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