Which Stocks Gained and Lost the Most Between the First and Second Rounds?
The window between the two voting rounds redefined the winners and losers of the Brazilian stock market. According to data compiled by InfoMoney, the inter-round period of the 2026 elections triggered sharp volatility on the B3, driven by shifting opinion polls, the repricing of fiscal risk, and recalibrated bets on future interest rates and foreign exchange. State-owned enterprises and domestic consumer stocks led targeted rallies, while exporters and defensive names took a hit from dollar volatility.
- Top Gainers: State-owned companies and businesses sensitive to domestic credit gained momentum following the makeup of the new congressional bench and candidates' economic signals.
- Bottom Losers: Commodity exporters suffered losses amid a temporary pullback in the US dollar and lower appetite for purely defensive theses.
- The Driver: The reconfiguration of electoral bets forced money managers to unwind hedges and recalibrate their exposure to local equities ahead of the final vote.
The shift in market sentiment between the first and second rounds clearly exposed which investment theses depend on election outcomes and which operate decoupled from the domestic political environment.
The Stock Ranking: Top Gainers and Losers in the Inter-Round Period
Sector asymmetry was the hallmark of the final campaign weeks. According to data reported by InfoMoney, the stocks that topped the gains captured an improved sentiment regarding local investor risk appetite. Conversely, names in negative territory reflected a decompression in exchange rates and portfolio adjustments by institutional investors.
The advance of tactical stocks outperformed the broader Ibovespa. InfoMoney's mapping indicates that short-term investors concentrated buy orders in stocks trading at steep discounts relative to historical valuations, especially within retail and infrastructure, which reacted to expectations of greater government stability and governance in the upcoming legislative term.
Which Sectors Were Hit Hardest by the Electoral Scenario?
Stock performance split the market into three distinct operating blocks. To understand why figures varied so widely in InfoMoney's survey, we must examine the economic drivers of each asset class between the two voting dates:
Benefited from perceptions of balance in the National Congress and lower risk of drastic interventions in corporate governance.
Stocks beaten down over the year mounted a rebound as intermediate maturities on the future interest rate (DI) curve eased.
The temporary appreciation of the real against the US dollar reduced these companies' local-currency profitability during the analyzed window.
The easing of the future interest rate curve fueled domestic stocks. According to analysis compiled by InfoMoney, the compression of intermediate future rates provided margin relief for leveraged companies and accelerated demand for real estate and educational stocks, whose revenues depend heavily on disposable income and financing costs.
Conversely, the unwinding of defensive positions weighed on dollar-linked stocks. As tail risk receded in the pre-election period, multi-market funds cut back on dollar purchases and assets tied to metal commodities and pulp, generating the selling pressure captured in InfoMoney's study.
The Market Timeline Between the First and Second Rounds
Price trajectories were far from linear across the three weeks of the electoral interval. The data published by InfoMoney highlights the moments when the stock market experienced heightened volatility and sudden shifts in direction:
Foreign investor participation kept liquidity flows at elevated levels. InfoMoney's compilation notes that while retail investors remained cautious on the B3, international capital seized correction moments to build positions in Brazilian assets with attractive valuations, ensuring operational volume for high-liquidity stocks.
What Does This Move Mean for Your Portfolio?
Politically driven moves call for technical caution in asset allocation. Investors tracking stock price fluctuations must distinguish short-term rallies driven by circumstantial events from sustainable long-term trends grounded in corporate fundamentals.
If you hold stocks among the top inter-round gainers, avoid buying at the peak driven by moment-in-time enthusiasm. For those holding stocks that dropped during the period, evaluate whether the company's operating fundamentals have changed or if the decline merely reflects temporary currency fluctuations and short-term fund flows.
Short-term performance comparisons should not guide structural rebalancing. The volatility recorded between the first and second rounds represents a tactical slice of the market. Investment decisions regarding solid companies should prioritize metrics such as return on equity (ROE), debt levels, and free cash flow generation.
How to Trade the B3 After the Election Results?
With the election behind us, market focus returns to macroeconomic fundamentals and earnings reports. InfoMoney's study on market swings reinforces that political volatility tends to give way to analysis of the elected government's fiscal policy and the trajectory of the Selic rate set by the central bank.
Verify thesis fundamentals — Ensure that a stock's recent appreciation is supported by consistent earnings rather than mere speculation on election outcomes.
Monitor the yield curve and exchange rate — The post-election behavior of future DI rates and the dollar will indicate whether retail gains are sustainable and exporters have room to run.
Maintain sector diversification — Avoid concentrating capital in a single electoral thesis; combining domestic and dollar-denominated stocks reduces portfolio volatility risk.
The Inter-Round Diagnosis: InfoMoney's survey shows that the stock market used the window between the first and second rounds of the 2026 elections to adjust prices and clear out tactical distortions. For retail investors, the moment calls for calm: sharp moves driven by electoral flows will pass, but asset quality remains the sole decisive factor for long-term portfolio returns.