EMERGING MARKETS-Brazil real hits 8-month high as Latam currencies rally

SAO PAULO, April 29 (Reuters) - Brazil's real surged to an eight-month high on Friday, prompting the country's central bank to step up intervention to derail the rally, while Colombia and Mexico's pesos also hit their strongest levels this year. Dovish signs from the U.S. Federal Reserve have fueled strong gains in Latin American currencies this week. The dollar index, a measure of the greenback's value against a basket of currencies, was on course for its third consecutive monthly decli