Morning Edition · Monday, October 12, 2026Published at 1:11 AM EDT · New York
Datafolha shows the senator ahead 52% to 48% before the October 25 vote, after the Ibovespa rose 7.7% to above 200,000 points following the first round.
President Luiz Inácio Lula da Silva held a mass rally on Sunday as polls showed Flávio Bolsonaro, senator and son of former president Jair Bolsonaro, favored to win the October 25 runoff. Datafolha's first runoff poll shows Flávio ahead 52% to 48%, and an Ipespe poll gives him 52.7%. In the first round on October 4, he won 47.03% of valid votes to Lula's 45.16%.
Flávio spent Sunday meeting mayors and city councillors from greater São Paulo, according to state news agency Agência Brasil. His campaign also filed a criminal complaint with the electoral courts. It accuses Andrei Rodrigues, director-general of the Federal Police, of using the force to influence the first round in Lula's favor, InfoMoney reported. The government has not accepted that accusation.
Markets have already priced in a Flávio victory. After the first round, the Ibovespa, Brazil's benchmark stock index, rose 7.7% to 206,911.89, above the 200,000-point mark, and the real gained about 4% against the dollar. Prediction markets Polymarket and Kalshi both gave Flávio an 88% chance of winning as of October 11.
The next government will inherit a slowing economy. Economists told Folha de S.Paulo that household consumption, the main source of Brazilian growth in recent years, is losing momentum and will grow at its slowest pace since the pandemic this year and next. They expect investment and exports to carry more of the load. From a sound-money view, growth driven by consumption, which rested on transfers and credit, is reaching its limit as high interest rates make borrowing more expensive.
Part of a tracked trend
Emerging-Market Elections Turn on Fiscal Credibility
In large emerging markets, polarised elections keep making fiscal rules and congressional arithmetic, rather than the identity of the winner, the main determinant of currency and local-rate pricing.
If voters believe the claim that the police favored Lula, Flávio's campaign gains, and so do investors holding Brazilian stocks and the real who have already bet on his victory.
The poll and market figures have sources, but the claim that the Federal Police tried to influence the first round is the campaign's own allegation and no independent source confirms it. It also comes after a long fight between the two sides, in which the Federal Police concluded that Flávio had slandered Lula and Flávio opposed the reinstatement of police chief Andrei Rodrigues.
An open-source-intelligence read of how likely this story is true with its real nuance, not a judgment of any outlet. It assesses the claim, weighing independent and adversarial reporting. How we label confidence.
What this means
When markets assign one candidate an 88% chance of winning, most of the expected gain from that outcome is already reflected in prices, and the larger risk is a surprise. The Brazilian real and local-currency bonds now depend more on whether the next government can pass a credible fiscal rule through a divided Congress than on who actually wins. The precedent is Argentina's 2023 election, when markets rallied on a promise of fiscal consolidation, and the gains lasted only as long as the government kept delivering spending cuts. If Flávio wins, the more likely outcome is that the rally fades within months unless his team sends Congress concrete spending legislation early in the term. If Lula wins, expect a sharp fall in the real and a rise in local yields within days. The decisive factor is the arithmetic in Congress after the vote, not the campaign itself.
Synthesized from: The Hindu · Agência Brasil · InfoMoney · Folha de S.Paulo
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