The release of compromising audio recordings involving Senator Flávio Bolsonaro (PL) and Daniel Vorcaro, controlling shareholder of Banco Master, has triggered a strong risk-off movement in Brazilian assets and reshaped probabilities in international prediction markets.
According to an investigation published by The Intercept Brasil, the senator allegedly demanded R$ 134 million from Vorcaro—an executive recently arrested by the Federal Police on charges of fraud and money laundering—to finance “Dark Horse,” a biographical film about former President Jair Bolsonaro, scheduled to premiere this November. Previously, the senator had vehemently denied any relationship with the banker.
The institutional and electoral fallout was immediate. On Polymarket, a leading global prediction market platform, the odds of Flávio Bolsonaro winning the 2026 presidential election plummeted. Within just 24 hours of the leak on May 13, 2026, the senator’s shares dropped approximately 14 percentage points, retreating from 43% to a low of 28.4%. In an inversely proportional move, the former governor of Minas Gerais, Romeu Zema (Novo), doubled his presence on the platform, positioning himself as a right-wing alternative untainted by recent scandals.
Data from Aposta Legal: Brazilian Presidential Betting Tips for 2026 on Polymarket | Analysis
Contagion Effect: FX and Equity Markets Hit
The political shockwave quickly spilled over into financial markets on May 13, injecting high volatility into domestic assets. The Brazilian Real (BRL), which had been on a strong appreciation trend and was emerging as the top-performing G20 currency amid the Hormuz Crisis in the Middle East, suffered an abrupt reversal. On the day of the incident, the currency fell by more than 2%, consolidating a cumulative depreciation of 3.21% over the subsequent five days.
The equity market tracked the capital flight movement. The Ibovespa, the B3’s benchmark index, ended the period with losses exceeding 3%. The impact was even more severe abroad: the EWZ index, which mirrors the performance of Brazilian equities in US dollars in New York, suffered a sharp decline of 6.03%.
Timeline of the Presidential Race in Prediction Markets
- February to April 2026: Flávio Bolsonaro enters a consistent upward trajectory after presenting an economic platform and consolidating support from the PL (Liberal Party), being perceived as the natural political heir to Jair Bolsonaro (currently ineligible and serving a 27-year sentence). His shares surge from 18% in early February to 45% by early May.
- May 4, 2026: A resolution by the National Monetary Council (CMN) banning the operation of prediction markets for non-financial events in Brazil comes into effect. Platforms like Polymarket and Kalshi have their access blocked within national territory.
- May 13, 2026: The Intercept Brasil releases the audio involving the R$ 134 million from Banco Master. Flávio’s shares melt from 43% to 28.4% in 24 hours, with betting capital migrating to Romeu Zema.
- May 16, 2026: Despite new reports reinforcing the Bolsonaro family’s ties to Vorcaro, assets linked to Flávio Bolsonaro show resilience. His shares advance from the 28.4% low to 33%, indicating that some speculators are pricing in a hardcore voter base that will not abandon the candidacy.
Overall Outlook for 2026: Who is Leading the Race?
With Flávio Bolsonaro losing momentum, current President Luiz Inácio Lula da Silva (PT) has regained the isolated lead and the status of favorite in Polymarket odds. The widening gap between the two frontrunners is noteworthy, as historical charts indicated a much tighter race over the past few months.
The current landscape of main pre-candidates on the platform is shaped as follows:
- Luiz Inácio Lula da Silva (PT): The favorite for re-election, widely regarded as the natural candidate by his allied base, despite the lack of a formal announcement.
- Flávio Bolsonaro (PL): Remains in second place (33%) but faces internal resistance and instability following the Vorcaro scandal.
- Renan Santos (Missão): The Moviment Free Brazil (MBL) co-founder captures about 10% of the platform’s shares, aiming to occupy the space of the independent liberal right.
- Romeu Zema (Novo): Registers in the single digits but has gained recent traction among bettors.
- Ronaldo Caiado (União Brasil): Maintains discreet political articulation, priced at roughly 1%.
- Aldo Rebelo (DC): Made his pre-candidacy official in January with a national-developmentalist platform, seeking to attract voters outside the traditional polarization axis.
The official ballot still depends on party conventions and formal registrations with the Superior Electoral Court (TSE). Therefore, these figures represent only a speculative international “thermometer” of current market sentiment, not a definitive metric of who will actually be on the ballot.
Regulatory Note: Polymarket Blocked in Brazil
It is mandatory to highlight that betting on electoral events is strictly prohibited under Brazilian law. On April 24, 2026, the CMN approved a resolution banning the offering of prediction contracts linked to non-financial events, a measure that took effect on May 4.
This regulatory framework differs entirely from the regulated fixed-odds sports betting market (Law 14,790/2023). The monitoring of Polymarket by portals such as Aposta Legal is strictly journalistic and analytical in nature. Such data does not equate to methodological electoral polling and operates under foreign jurisdiction, making the participation of Brazilian residents in these platforms illegal.
