Oil Slides as Iran-Oman Talks Fuel Hopes of Strait of Hormuz Reopening

Region · MARKETS

A fast reversal from Monday’s sanctions escalation puts Latin America’s crude exporters and their currencies back at the center of the Hormuz story.

Oil prices fell for a second straight session on Wednesday 26 August 2026 as Iran and Oman confirmed talks on a temporary joint shipping corridor through the Strait of Hormuz, reviving expectations of a Strait of Hormuz reopening and, with it, the prospect of a broader settlement between Washington and Tehran. Brent crude slid about 2% to US$86.80 a barrel in early Asian trade, after both benchmarks lost more than 3% on Tuesday 25 August, while US West Texas Intermediate fell to US$80.87.

An oil tanker under US Coast Guard escort in the Gulf, as Hormuz reopening talks sink crude prices.

From Monday’s sanctions package to Wednesday’s sell-off

The speed of the reversal has been striking. On Monday 24 August, Washington expanded sanctions aimed at cutting off Iran’s economic lifeline, a package the Treasury calls Operation Economic Outcast, blacklisting around 60 entities, individuals and vessels linked to Iranian shipping, aviation, gold, technology and digital assets, and warning that countries continuing to do business with Tehran could face penalties, though none were imposed immediately. Brent had settled on Monday near US$92 a barrel as traders weighed the risk of retaliation.

By Tuesday afternoon the narrative had flipped. Iran’s foreign minister Abbas Araghchi and his Omani counterpart Badr bin Hamad Al Busaidi confirmed they had discussed a joint temporary navigational corridor through the strait and agreed in principle to clear it of mines. Al Busaidi described the talks as constructive and said he hoped a corridor and practical measures to restore navigation security would be announced soon. Brent settled 3.9% lower at US$88.58 a barrel; during the session the most-active contract traded down 3.6% at US$87.27 on the ICE exchange in London, after touching a low of US$86.81.

Selling resumed in Asia on Wednesday. The prospect of a Strait of Hormuz reopening has triggered profit-taking after weeks of war premium, said Mitsuru Muraishi, an analyst at Fujitomi Securities, though he noted that bargain hunting was limiting further losses and prices were likely to remain range-bound for now. Data from the American Petroleum Institute, showing a 4.2 million-barrel build in US crude stocks in the week to 21 August, added to the downward pressure.

What a Strait of Hormuz reopening means for Latin America’s oil exporters

For Latin America’s crude exporters, a Strait of Hormuz reopening is a double-edged sword. Brazil, whose pre-salt output makes it the region’s biggest producer, earns less per barrel when Brent falls, trimming export receipts and royalties that feed federal and state budgets. Colombia’s Ecopetrol, Ecuador and Venezuela face the same arithmetic, with Brent, which spiked to US$126 in April at the height of the war, now trading roughly a third below that peak.

Yet the peace dividend cuts the other way. The same diplomatic thaw that knocks US$5 off a barrel of crude also lowers the geopolitical risk premium across emerging markets, supporting the currencies, bonds and equities of the very countries whose oil revenue declines. For net importers such as Chile, Central America and the Caribbean, meanwhile, cheaper fuel is an unambiguous gain for inflation and trade balances.

Venezuela is the wildcard. Any lasting US-Iran détente could eventually reshape Washington’s sanctions posture toward other sanctioned producers, analysts say, though there is no sign so far that the Trump administration intends to ease pressure on Caracas as part of the Hormuz track.

Real firms in São Paulo, Colombian peso consolidates

Latin American markets leaned into the risk-on move on Tuesday 25 August. In São Paulo, the dollar closed 0.25% lower at R$5.1399 against the real, while the Ibovespa stock index jumped 1.55%, with local desks citing the Hormuz corridor news and easing US Treasury yields as the session’s drivers.

In Bogotá, the official TRM rate for Tuesday was set at 3,056.51 pesos per dollar, leaving the Colombian peso among the fastest-appreciating emerging-market currencies in August after the dollar fell more than 2.9% in the previous week. The peso has gained about 3.2% since President Abelardo de La Espriella took office on 7 August, although it gave back about 1% in Tuesday’s spot session, with the dollar rebounding to around 3,090 pesos as oil’s slide weighed on exporter sentiment.

Why the peace trade remains fragile

The physical reality in the strait lags the diplomacy. A tanker was struck by an unidentified projectile and disabled about 9 nautical miles northeast of Oman’s Ash Shishah, at the entrance to the strait, on Tuesday, the United Kingdom Maritime Trade Operations agency reported. No casualties were registered, but the incident was a reminder that a durable Strait of Hormuz reopening requires security guarantees that do not yet exist.

Traffic data tell the same story. Ship-tracking monitors counted just three transits on 23 August against a pre-crisis baseline of about 85 a day, with several hundred tankers and cargo vessels holding position away from berth and war-risk insurance premiums still elevated. The strait carried about a fifth of global oil and liquefied natural gas shipments before the war began in February.

There are also precedents for disappointment. A June memorandum of understanding that offered a formal path to reopening the waterway lapsed on 17 August after Washington declined to renew it, and Tehran insists publicly that the strait will not fully reopen until the United States lifts its naval blockade and oil sanctions. In a cautiously positive signal, the United States has begun sending personnel back to some Middle East diplomatic missions that were evacuated during the fighting, two people familiar with the matter told Reuters, and the US Navy says all mines in the strait have been cleared, according to Al-Monitor.

What traders watch next

The immediate catalyst is the formal announcement Iran and Oman have hinted at: the coordinates and conditions of the temporary corridor, and any US endorsement of it. The timing of any Strait of Hormuz reopening announcement will set the tone for Brent’s next US$5 move in either direction.

Beyond diplomacy, traders are watching US inventory data, tanker insurance rates and this week’s Federal Reserve signals for the dollar’s direction. For Latin America, the balance is clear: a confirmed corridor would entrench the risk-on mood lifting the real and regional equities, while another failed round of talks would put the war premium, and the pressure on the region’s currencies, straight back into the price of oil.

Frequently Asked Questions

Sources

• finance.yahoo.com
• g1.globo.com
• www.moneytimes.com.br
• www.noticiascaracol.com
• straits.live

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