SAO PAOLO & BOGOTA, Colombia--(BUSINESS WIRE)--Fitch Ratings has affirmed the Brazilian state of Maranhao's national long-term rating at 'AA-(bra)' with a Stable Outlook. The agency has also affirmed the long-term Issuer Default Rating (IDR) at 'BB+'. The Outlook remains Negative. The Outlook reflects the Negative Outlook assigned to Brazil on April 09, 2015. KEY RATING DRIVERS The Maranhao's ratings affirmation is based on its modest economic base and low economic diversification. These are co