By Lise Alves, Senior Contributing Reporter

SÃO PAULO, BRAZIL – One of the most important risk classification companies in the world, Moody's Investors Service has placed Petrobras S.A.'s global foreign currency and local currency debt ratings on review for a possible downgrade. This would be the second time Petrobras’ debt ratings was downgraded by Moody’s after in October the oil giant’s debt ratings was downgraded from Baa1 to Baa2 stating that the company’s outlook remained negative.

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