Flávio Bolsonaro led Luiz Inácio Lula da Silva in Brazil’s October 4 presidential first round, winning 47.03% to Lula’s 45.16%. That puts the October 25 runoff at the center of regional political and market attention. In the October 9 snapshot, the result offers the clearest measure yet of a national contest that voters still have to decide at the ballot box.
At the October 8 close, Brazil’s Ibovespa stood at 206,220, up 0.94%. Mexico’s S&P/BMV IPC reached 64,852, up 0.31%; Chile’s S&P IPSA was 11,024, up 0.22%; Argentina’s S&P Merval hit 2,832,472, up 0.30%; and Colombia’s COLCAP sat at 2,526, down 0.36%. USD/BRL stood at 5.0241, up 0.15%, while USD/MXN reached 18.1972, up 1.20%.
Brazil’s vote and market bets
After the first round, prediction markets put Flávio Bolsonaro ahead of Lula. By October 8, platforms covered by the report gave Flávio about an 86% chance and Lula about 14%. Polymarket traders put Flávio’s chance of winning at 85.7% and Lula’s at 13.5%, with US$178 million traded. The platform recorded those prices at 11:05 p.m. ET on October 8.
The report warned that prediction-market bets aren't polls. These platforms turn real-money bets into probabilities, which can shift within minutes of news; investors, campaigns and newsrooms in the United States follow them alongside polls and official results. Kalshi, another platform covered in the report, falls under CFTC regulation in the United States.
Rio de Janeiro’s governor’s race also remained unsettled. Douglas Ruas of the PL led the October 4 first round with 49.27% of valid votes, compared with 42.76% for Eduardo Paes. The fate of votes cast for Anthony Garotinho remained under review after he withdrew his appeal to the electoral court on October 5. Legal technicalities carry political weight, the report said, advising foreigners with Brazilian assets to expect volatility that may be emotional before financial.
Diplomatic friction and economic exposure
Mexico’s President Claudia Sheinbaum questioned US Ambassador Ronald Johnson’s appearance alongside Querétaro Governor Mauricio Kuri at an October 2 first-stone ceremony for an international police academy. On October 5, she asked the Foreign Ministry to contact both men. The report described diplomatic friction between Mexico and the United States, even as their economic ties remained deep. The peso lost 1.2% against the dollar on Thursday.
Imported fuel remained a pressure point for Chile. From January through August, the country imported about US$4.2 billion of diesel, with roughly 93% coming from the United States. Chilean press reports said Washington had weighed restrictions on diesel exports. The IPSA gained 0.2% to 11,024 on Thursday.
Economic uncertainty and local events
According to local financial press, Argentina’s Central Bank had been buying dollars heavily in early October, while the official peso rate held near 1,516 per dollar on Thursday. The Merval gained 0.3% to 2,832,472 points. The report called the rise modest, driven by hope rather than proof.
In Colombia, retailer D1 and Fundación Santo Domingo pledged an additional 20 billion pesos, about US$6 million, to help families affected by the August 10 earthquake. The pledge covered 1,000 tonnes of food for 25,000 families over six months. On October 8, the COLCAP fell 0.4% to 2,526.
Peru observed the Battle of Angamos national holiday on October 8, honouring the navy’s stand against Chile’s fleet in the War of the Pacific in 1879. The report described the holiday as a public ritual tied to the country’s past. Across the regional snapshot, everyday reference points included lottery tickets, dollars bought and food donations.