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Brazil’s markets open Monday into a hole that Polymarket and Kalshi did not see coming. Lula secured 51.79% of the vote against Flávio Bolsonaro’s 48.21%, reversing a first-round deficit and producing one of the sharpest overnight asset moves in emerging-market memory. Lula lost the first round on October 4, then became the first candidate since Brazil adopted the two-round system in 1989 to win the presidency after finishing second in the first round.

Market Snapshot

Brazilian assets had already priced in a market-friendly outcome, on the expectation that a Bolsonaro government would swiftly carry out a deep fiscal adjustment. By Friday’s close, Brazilian equities stood almost 7% above their pre-first-round level and the real had gained nearly 5% against the dollar. All of that is now unwinding simultaneously.

Brazil’s spot dollar had closed at R$4.9896 on Friday. By late Sunday, November real futures traded overseas had fallen 10.02%, implying approximately R$5.56 per dollar. A Tokyo-listed Brazil equity ETF fell about 15% during Asian hours. EWZ went further in U.S. overnight trading: the iShares MSCI Brazil ETF plunged nearly 20% at its lows following Lula’s win.

Trading desks in São Paulo expect selling pressure to be severe enough to trigger circuit breakers when local markets open. Warren Investimentos head of macro strategy Luis Felipe Vital said: “We expect a sharp market reaction on Monday, with aggressive price adjustments, a selloff in assets and interest rate futures likely to hit their upper limit shortly after the open.”

Stocks in Focus

Petrobras plunged roughly 21% in premarket trading. Vale was down about 3%. The divergence matters: domestically exposed financials and state-linked energy names bear the most fiscal risk, while commodity exporters like Vale have some insulation through dollar-denominated revenues.

Bolsonaro refused to concede defeat, saying he would seek the annulment of the outcome, and called a Supreme Court ruling to extend voting by two hours “unacceptable.” That legal cloud adds a second layer of uncertainty above the fiscal one and is the reason banks are selling harder than miners.

The fiscal uncertainty is compounded by a longer-running tension between Lula and Brazil’s monetary authority. Brazil’s central bank governor has already had to publicly defend the institution’s independence against direct presidential pressure.

One contrarian note: Gavekal Research analyst Rohan Daswani said investors should view a potential drop in Brazilian shares as a buying opportunity after Lula’s unexpected victory, while warning that the market could see sharp selling at the open. Daswani said Congress is more conservative than the president, limiting the scope for a major leftward shift in economic policy.

Sector Watch and Regional Read-Across

The angle that most other publications are missing: Lula’s survival does not occur in a policy vacuum. Chile and Colombia rate decisions, Brazil jobs data, and Mexico GDP are all on the calendar for the week of October 26 to 30. Chile’s central bank announces its rate decision on Tuesday 27 October, with the policy rate at 4.5% and the market pricing no change. Colombia’s bank raised its rate by 0.25 points to 12.25% on September 30, so Friday’s meeting tests whether it pauses.

Each of those decisions now lands on a region that has just lost its perceived right-wing anchor. Capital that rotated into Latin America on a Bolsonaro-plus-Milei thesis is being reassessed in real time. Chilean copper miners and Colombian energy names are not immune to that repositioning, even if their domestic politics are unchanged.

Catalyst Calendar

• Monday, Oct. 26: B3 reopens; first live session for BRL, Ibovespa, PBR, VALE, ITUB, NU, and EWZ after the result. Circuit-breaker risk is real.
• Tuesday, Oct. 27: Chile central bank decision at 9 p.m. Santiago time. A hold is the base case, but any hike signal pressures the peso and copper complex.
• Wednesday, Oct. 28: U.S. Federal Reserve rate decision. A hawkish surprise tightens the dollar and compounds BRL pressure.
• Friday, Oct. 30: Colombia central bank decision plus Mexico GDP. A Colombian pause would be read as LatAm central banks blinking; a second hike is a different signal entirely.

Risk Radar

After the first round, markets rose, assuming a Bolsonaro victory. A large part of today’s sell-off is the desire to unwind positions previously taken for a Bolsonaro win, rather than a fresh assessment of Lula’s policies. That distinction matters for timing: the forced unwind is finite, but the genuine policy reassessment is not.

Reuters reported that Goldman Sachs analysts expect “modest measures” to contain the government’s spending growth, alongside further increases in an already high tax burden, while major structural reforms remain unlikely. No economic team or budget plan has been announced yet, and that absence is what keeps the range of outcomes so wide.

The Cheat Sheet

• Top Theme: A market that heavily favored Bolsonaro is recalculating everything Brazilian at once, with spillover risk to the broader LatAm complex this week.
• Stock to Watch: PBR. State-run, dividend-sensitive, and most exposed to a Lula spending agenda. How it trades in the first hour sets the tone for the B3 session.
• Sector to Watch: Brazilian financials (ITUB, NU, Banco do Brasil). They recover fastest if the annulment dispute fades and a credible fiscal signal emerges.
• Biggest Risk: Bolsonaro’s annulment push creates a legal overhang that no central bank guidance can dissolve. Markets hate open-ended political litigation.
• Biggest Opportunity: VALE. Dollar revenues, conservative Congress limiting Lula’s reach, and a sell-off driven more by panic than fundamentals.
• One Thing to Remember: The overnight futures move in thin Sunday liquidity always overshoots. Watch where BRL and EWZ stabilize in the first 30 minutes of real trading, not where they opened.