President Luiz Inácio Lula da Silva’s lead over right-wing challenger Senator Flávio Bolsonaro tightened to five percentage points in a simulated second-round runoff, according to the latest Genial/Quaest poll released Wednesday, a shift that renews political uncertainty for investors following *Brazilian markets*. The poll found the incumbent President with 44% of voting intentions against 39% for Bolsonaro, the eldest son of former President Jair Bolsonaro. This marks a clear tightening from the previous Genial/Quaest survey in July, which showed Lula leading by eight points, 45% to 37%, and will likely elevate volatility across *Brazilian assets* including the *Ibovespa* and the *Brazilian real* (*USD/BRL*).