Lula Government’s Congressional Support Halves in Senate, Escalating Brazil Fiscal Risk

The Lula administration's support in the Brazilian Senate for its priority legislative agenda has plummeted, falling from 75% to just 38.5% between the first half of 2025 and the first half of 2026, directly escalating the country’s fiscal risk for investors. The sharp decline in political alignment threatens the government’s ability to secure new revenue-generating measures and, crucially, to block costly spending proposals known as 'fiscal bombs' that are advancing through the National Congress. This deterioration in governability is concentrated among key centrist parties, including União Brasil, PSD, and Podemos, whose congressional caucuses have increasingly broken ranks with the Executive.

The mechanism by which this political shift translates into market risk is concrete: a weakened government cannot defend the budget, making it harder to meet the challenging fiscal targets required under the new Arcabouço Fiscal (Fiscal Framework). The cost of this legislative isolation has already been quantified. Congress recently delivered a major defeat to the Executive by annulling a presidential decree that would have raised the Imposto sobre Operações Financeiras (IOF), a financial transaction tax, a move that created an estimated revenue shortfall of R$10 billion for the budget. Furthermore, the Ministry of Finance has warned that a host of spending bills currently in legislative committees—including proposals for higher salary floors and debt renegotiation—represent a combined annual fiscal impact of over R$111 billion if approved.

For fixed income and currency markets, this institutional friction signals a higher probability of missing fiscal goals, which directly pressures Brazil's risk premium. Increased budget uncertainty pushes up the expected path for the Selic benchmark interest rate, potentially forcing the Central Bank to maintain its high-rate stance for longer to compensate for loose fiscal policy. Higher risk appetite, or 'fiscal fear,' drives capital toward safe-haven assets, placing upward pressure on the USD/BRL exchange rate, which currently trades near 5.09. The IBOV (Ibovespa) stock index, which includes key Brazilian ADRs such as Petrobras (PBR) and Vale (VALE), faces increased volatility as investors price in higher borrowing costs for corporations and reduced sovereign creditworthiness. The loss of a stable, reliable legislative base removes a key buttress for the government’s economic agenda.

Investors should closely watch the administration’s response, as the government has hinted at the possibility of appealing to the Supreme Federal Court (STF) to block the most fiscally damaging 'bombs' from Congress, a maneuver that would ramp up institutional tensions. The next critical points to watch will be any further attempt by the Executive to find alternative revenue sources to close the R$10 billion IOF gap, and the outcome of voting on any of the R$111 billion in 'fiscal bomb' proposals scheduled for the upcoming legislative calendar.