The global upswing in fuel prices is laying bare how unevenly South American countries can cope with an oil shock, placing particular strain on Argentina as it pursues a sharp free‑market agenda under President Javier Milei.
Chile, heavily dependent on fuel imports, is among the most exposed to the fallout from the U.S.-Israeli conflict with Iran. Officials there moved to unwind a price‑stabilization mechanism, which will push retail fuel costs substantially higher - with gasoline set to increase by as much as 30% and diesel by up to 60%.
In Brazil, state energy firm Petrobras implemented a steep rise in jet fuel prices this week of roughly 55%. Central bank officials in Brazil have warned that the oil shock could exert upward pressure on inflation, even as the country’s position as a net oil exporter provides some buffer. Peru has also seen inflation spike in March, driven by higher fuel costs and disruptions to domestic supply.
By contrast, a Citi analysis identifies Uruguay as an outlier that is less exposed to the current shock. That analysis points to Uruguay’s lower reliance on direct energy subsidies and its adequate international reserves as factors that reduce immediate vulnerability.
In Argentina, higher global fuel costs are filtering through to transport, food and household expenditures, undercutting the narrative that deep spending cuts and deregulation are already defeating what had been runaway inflation.
"Prices are up and salaries stay very low," said Agustin Pecora, a construction worker on a railway project in Buenos Aires province, describing the effect on household budgets.
Inflation challenge arrives at an inopportune time
Argentina’s monthly inflation has been running around 3% for nine consecutive months, equivalent to roughly 33% on an annualized basis. Private forecasters had already been raising 2026 inflation projections prior to the recent surge in crude prices in February. "The Iran shock has arrived at the worst possible moment for Milei’s counter‑inflation program," said Mariano Machado, Americas analyst at Verisk Maplecroft.
Gasoline prices in Argentina have climbed about 15% on average since late February, according to energy analyst Fernando Bazan at consultancy Abeceb, making it harder for the government to reach its target of pushing monthly inflation below 1% by mid‑year.
Government officials have taken some short‑term steps to ease pressure: regulators relaxed gasoline quality standards and postponed a planned fuel tax increase. Bazan warned, however, that these measures will only have limited effect.
An Argentine government source said that no further measures were being contemplated and that energy subsidies must remain capped at 0.5% of GDP this year to meet fiscal targets.
YPF at the center of a difficult trade‑off
State energy company YPF dominates Argentina’s fuel market and has so far increased prices more slowly than international benchmarks would suggest. That cautious stance reflects a difficult trade‑off between shielding households from volatile global markets and the risk of shareholder pressure to raise prices when oil trades much higher.
"If oil is at $120 or $150 per barrel, then YPF’s shareholders will pressure management to maximize returns," said financial advisor Paula Bujia.
Despite previous assurances that price pressures would be temporary, YPF introduced a 45‑day buffer on gasoline pricing late on Wednesday, aiming to protect consumers from short‑term swings in global crude. "During this period, YPF will not pass on the impact of new fluctuations in Brent prices to consumers," Chief Executive Horacio Marin said in local media interviews, adding that the measure was "not a price cap" and that prices would remain constant during the buffer period.
Longer‑term structural position and political risk
Argentina’s energy position is structurally stronger than it was a decade ago. Development of the Vaca Muerta shale formation has helped turn what was nearly a $7 billion energy deficit in 2013 into an energy surplus. Nonetheless, the country remains dependent on natural gas imports to meet peak winter demand that starts in June.
The regional experiences underscore the political risks facing Milei. Fuel price increases in Chile have already sparked protests, denting the popularity of newly inaugurated President Jose Antonio Kast. "A fuel price shock impacts an electorate lacking financial leeway, turning economic discomfort into a political grievance," Machado said, adding that such grievances could "provide the glue" for Argentina’s fragmented opposition ahead of the 2027 presidential race.
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