The race for the Brazilian presidency is a statistical dead heat, with incumbent President Luiz Inácio Lula da Silva and his main challenger, Senator Flávio Bolsonaro, locked in a 41%-41% tie in a simulated second-round runoff, according to a Quaest poll released on Monday. The numerical tie confirms the high degree of political uncertainty facing Brazil's October election and guarantees a highly volatile final stretch for the country’s economy and its currency.