EMERGING MARKETS-Brazil's real sinks on debt data; Mexico peso up on intervention

By Asher Levine SAO PAULO, July 31 (Reuters) - Brazil's currency sank its most in nearly three months on Friday after worse-than-expected government debt data raised investor fears of a credit downgrade, while Mexico's currency gained following new government efforts to support the struggling peso. Other currencies in the region were little changed, though Colombia's peso posted a modest rebound after hitting its weakest in nearly 12 years on Thursday. The Brazilian real started the