Latin American FX: Real, Peso and Andean Currencies — 2026-10-24
Brazil’s real surged below the psychological R$5.00 barrier ahead of its presidential runoff, while the Mexican peso suffered its worst month-long slide amid unwinding carry trades. Meanwhile, Argentina’s parallel "blue" dollar approached record highs, and Chile’s peso faced predictions of breaking the 1,000 per dollar mark.
Latin American FX: Real, Peso and Andean Currencies — 2026-10-24
Top developments
Brazil’s Real Breaks Below R$5.00 Ahead of Runoff
The Brazilian real strengthened significantly, closing at R$4.993 per US dollar on Friday, October 23, marking a 0.90% daily gain. This move brought the currency below the R$5.00 threshold for the first time in weeks, driven by a narrowing in electoral polls and a "wait-and-see" approach by global investors ahead of the Sunday runoff. The Focus survey from the Central Bank of Brazil (BCB) also trimmed its year-end inflation forecasts, supporting rate-cut bets and boosting the real’s appeal.

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Mexican Peso Hits October Low as Carry Trades Unwind
The Mexican peso depreciated to approximately 18.67 per US dollar on October 21, its weakest close of the month, representing a 1.3% decline. This drop was fueled by rising Middle East geopolitical risks and a reversal in carry trade positions, as implied one-month volatility spiked to 12.55% from 6.39% in early September. Analysts at El Financiero noted that while the peso ended the week with slight gains, structural pressures remain, with some forecasts suggesting the dollar could test 20 pesos by year-end if T-MEC renegotiations stall.

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Argentine Blue Dollar Nears Record as Banks Rally
In Argentina, the parallel "blue" dollar rose $10 pesos over the week, closing near its historical record as the official exchange rate lagged. Despite the currency pressure, the MSCI Merval index jumped 4.4% to 102,278 points on October 23, driven by a rally in bank stocks. Country risk remained elevated above 700 basis points, reflecting investor caution despite the stock market gains. The Central Bank of Argentina (BCRA) continued to accumulate reserves, closing the week with a positive balance of US$270 million.

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Chilean Peso Faces Volatility Above 1,000
Chile’s peso slipped against the dollar, with Credicorp economists predicting brief spikes above the 1,000 CLP per USD mark. The dollar closed Friday at its highest level since April 2025, driven by global risk aversion and commodity market fluctuations. The Chilean currency’s weakness contrasts with Brazil’s real, highlighting diverging monetary policy expectations in the region.

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Local view
- El Financiero (Mexico): Analysts warn that the peso’s 1.3% drop to 18.67 is a "nightmare" scenario for importers, with Citi forecasts suggesting a 2026 year-end close of 18.20 pesos, though risks are skewed higher due to Fed rate expectations.
- Infomoney (Brazil): Local media highlighted the dollar’s 1.64% weekly decline, noting that the real’s strength is partly due to high domestic interest rates maintaining carry trade attractiveness despite electoral uncertainty.
- Ambito Financiero (Argentina): Reports indicate that while the blue dollar is near records, the gap with the official rate remains manageable at around 3.17%, as the BCRA’s reserve accumulation program stabilizes the official market.
Context & numbers
- USD/BRL: Closed at 4.993 on Oct 23 (down 0.90% daily; down 1.64% weekly).
- USD/MXN: Closed near 18.67 on Oct 21 (down 1.3% daily); implied volatility rose to 12.55%.
- Argentina Blue Dollar: Closed at $1,565 (selling price), up $10 for the week. Official rate at Banco Nación was $1,550.
- Argentina Merval: Jumped 4.4% to 102,278 points on Oct 23.
- Commodities: Brent crude jumped to US$109, impacting Latin American FX correlations.
On the radar
- Brazil Runoff: The presidential election runoff takes place on Sunday, October 25. Markets are bracing for potential volatility depending on the outcome, with polls showing a technical tie.
- Colombia Visa Deadline: Colombia’s visa deadline for certain categories is 7 days away, potentially impacting short-term capital flows and expat sentiment.
- Hurricane Vance: A major hurricane is forming off the coast of Mexico, which could disrupt logistics and affect peso stability if supply chains are impacted.
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