With Brazil's presidential elections fast approaching, market focus remained pinned on the contest.
An AtlasIntel/Bloomberg poll showed Brazilian Senator Flavio Bolsonaro and President Luiz Inacio Lula da Silva remain statistically tied in a simulated runoff ahead of next month's vote.
Surveys lately continue to point towards a neck-and-neck race, with market sentiment influenced by shifts in the electoral odds.
Against this backdrop, President Lula announced a 15% increase in cash transfers under the country's flagship welfare program, Bolsa Familia, to shore up his support ahead of the election.
The program could add to investor anxiety over the deteriorating public finances under the current government.
"Of course, investors associate Bolsonaro with a more fiscally prudent and market-friendly policy agenda," Luca Bindelli, head of investment strategy at Lombard Odier, said.
"I don't think Lula's potential win would be outright negative, but it would likely not lead to gains as strong as those under a Bolsonaro victory."
On the monetary policy front, Brazil's central bank on Wednesday cut interest rates by 25 basis points for a fifth straight meeting amid firmer signs of an economic slowdown while keeping its options open ahead of the election.
"After a series of weaker economic growth data, we think this should help soothe sentiment," Bindelli said.
The benchmark Ibovespa index .BVSP added 0.5%, while the real BRL= inched 0.3% higher.