Latin America’s Oil Money and the US Squeeze on Iran

Latin America · ENERGY

Washington’s new pressure campaign on Tehran is moving oil markets and currencies.

The United States has announced an economic offensive against Iran called ‘Iran economic D-Day’. President Donald Trump says it targets any country that helps Iran, including by buying its oil.

What Was Announced

President Trump announced ‘Iran economic D-Day’ against Iran on August 24, 2026. He said it targets any country that provides any help, including oil purchases.

Treasury Secretary Scott Bessent promised ‘the harshest sanctions in history’. He gave statements, with the detail promised at a later briefing.

As of August 24, no formal sanctions document has been published. Only statements and warnings exist so far.

This announcement builds on years of US pressure to isolate Iran’s economy. For Latin America, the threat of secondary sanctions is a real concern.

The US Treasury’s Office of Foreign Assets Control (OFAC) would enforce any new measures. Regional banks and firms need to watch for legal details.

Many Latin American countries have trade ties with Iran, though volumes are small. Still, even small deals could trigger penalties.

The ‘Iran economic D-Day’ is a political signal as much as an economic one. It warns allies and rivals alike of Washington’s resolve.

For ordinary citizens, the immediate effect is on fuel prices. Higher oil costs could feed into inflation across the region.

Iran’s Response in the Strait of Hormuz

An Iranian authority blacklisted 45 tankers with warnings of fines and seizure. This is a concrete list, not rhetoric about the whole Gulf.

Separately, Iranian officials threatened that not a drop of oil would leave the Persian Gulf. They also said all Gulf oil exports could be blocked if the economic war continues.

Some unconfirmed reports say the number is 46 tankers, citing the Financial Times. No formal shutdown of the strait has been announced.

The Strait of Hormuz is a narrow waterway for about 20% of global oil. Any disruption there would hit world prices immediately.

Iran has threatened to close it in past disputes, but never fully did. This time, the listed tankers are a new tool for leverage without war.

For Latin American shippers, the risk is higher insurance costs and rerouting. Some may avoid the strait entirely until clarity emerges.

Oil Prices React

Brent settled at US$93.78 a barrel on Thursday 20 August 2026, up 2.36%. This was the highest since 24 July.

It settled at US$94.39 on Friday 21 August, up 0.65%. On Monday 24 August, it eased to about US$93.17, down 1.29%.

Oil rose through the week before the announcement and slipped on the Monday. It did not fall ahead of the announcement.

This price level is high for consumers but a windfall for oil exporters. Brazil and Colombia see more revenue from each barrel sold.

However, the drop on Monday shows traders are not sure what comes next. They await concrete action from Washington.

The ‘Iran economic D-Day’ adds a geopolitical premium to oil. That premium could shrink or grow based on news from Tehran.

Iran’s Currency Hits Record Low

The Iranian rial fell to about 2.02 million per dollar on informal markets. That is an all-time low.

The official Central Bank of Iran rate is around 1.5 million rials per dollar. The informal rate is the one Iranians actually trade at.

This gap shows market fear and uncertainty about future sanctions. It also pressures Iran’s economy and imports.

For Latin American investors, the rial’s fall is a warning about currency risk. It reminds them how sanctions can destabilize a currency quickly.

The informal rate is where most Iranians actually trade dollars. It reflects real economic pain rather than official numbers.

What This Means for Latin America

Higher oil prices above US$90 benefit net oil exporters like Brazil, Colombia, and Guyana. They gain more tax revenue and foreign currency.

Mexico also gets more income from crude sales, but only partially. Net importers, like Central America and the Caribbean, face higher inflation and fuel bills.

Venezuela and Ecuador gain from the reference price, but sanctions and production limits cap their gains. A cheaper oil scenario would reverse all these effects.

The ‘economic D-Day’ raises risks of US secondary sanctions on Latin American banks, shippers, and traders dealing with Iran. No specific Latin American companies are listed yet.

Brazil’s state oil company Petrobras could see higher earnings. But it also faces higher costs for imported diesel and derivatives.

Guyana, a new oil producer, benefits from every dollar above US$80. Its economy is growing rapidly from oil revenues.

For importers like Chile and Peru, fuel costs directly hit consumers. Governments may need to subsidize or adjust prices to avoid social unrest.

The region’s largest economies, Mexico and Brazil, are less exposed due to their own production. But they still import some fuels.

Opportunities and Risks for Foreign Investors

For investors in Latin America, higher oil prices are a double-edged sword. Exporters see strong earnings, but importers and consumers face cost pressures.

Energy stocks in Brazil and Colombia may rally, while airlines and transport companies suffer. The key is how long oil stays above US$90.

Monitor whether the US publishes a formal sanctions package. That would trigger more market moves and compliance costs for regional firms.

Some funds might see this as a buying opportunity for energy equities. But volatility requires careful risk management.

Currencies like the Colombian peso and Brazilian real could strengthen with oil. Yet inflation pressures could push central banks to raise rates.

Investors should also watch shipping insurance premiums for Latin American routes. Higher premiums could eat into trade profits.

What Comes Next

Watch for the official Treasury/OFAC announcement with legal details. Until then, the ‘D-Day’ remains a threat, not a fully enforced program.

Iran’s next moves in the Strait of Hormuz will be critical. Any actual disruption to tanker traffic would spike oil prices further.

Expect more volatility in oil, currencies, and shipping costs. Latin American governments and companies should prepare for both scenarios.

The ‘Iran economic D-Day’ could also affect diplomatic relations in the region. Countries that trade with Iran may face pressure from Washington.

If the US exempts some nations, that would reduce risks for those importers. But no such exemptions are announced yet.

In the coming weeks, clarity on sanctions will shape market direction. Until then, prepare for sharp swings in oil prices.

Frequently Asked Questions

Sources

• USA Today, Reuters, NPR — Trump’s ‘economic D-Day’ announcement
• Reuters, CNBC, The New York Times — Bessent’s sanctions promise
• Reuters, Yahoo
• AP via Yahoo Finance, Mint — rial record low and official rate
• CGTN — Brent price rise after announcement

This article was produced by The Rio Times’ automated newsroom system. How we use AI · Report an error