EMERGING MARKETS-Bovespa rallies, yield curve inverts on election bets

(Adds Brazilian yield curve inverting) SAO PAULO, Aug 27 (Reuters) - Brazil's Bovespa stock index rose to its highest in 19 months on Wednesday after polls showed President Dilma Rousseff might lose her re-election bid in October, while the yield curve on benchmark interest-rate contracts inverted on bets the next president will be tougher on inflation. The broader MSCI Latin American stock index rose to its highest level in over two weeks, while regional currencies were mixed. A wi