* LatAm FX, stocks set for monthly, quarterly gains * MSCI global EM stocks gauge eyes longest win streak since 2003 * Colombian central bank holds rates (Updates with afternoon trading) By Nikhil Sharma and Purvi Agarwal Sept 30 (Reuters) – Latin American stocks and currencies were poised for their third consecutive quarter of gains on Tuesday, showing resilience despite fears about a potential U.S. government shutdown. MSCI's index for Latin American currencies was on track for its third straight quarterly advance, up 5.3%, while it rose 2.8% in September. On Tuesday, the currency index was little changed as global investors weighed the risks of a potential U.S. government shutdown, which could delay Friday's jobs data and complicate the Federal Reserve's rate outlook. "Should the govern

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