Global Oil Shipping Hits Critical Low as Iran Sanctions Choke World's Vital Energy Route

Cargo traffic through the Strait of Hormuz fell to just two vessels on Monday, the lowest daily count since early May, a concrete signal of how quickly the latest round of U.S. sanctions on Iran is reshaping the waterway that carries roughly one-fifth of the world’s crude oil and liquefied natural gas. For the millions of people whose energy costs, fuel supplies and economic stability depend on that flow, the consequences of Washington’s new “economic isolation campaign” are already arriving.

The Treasury Department announced Monday a sweeping effort to sever Iran’s access to international markets and banking infrastructure. The campaign targets what Washington describes as Iran’s “shadow fleet” and oil-smuggling networks, including intermediaries, shipping companies, financial facilitators and vessels involved in transporting Iranian crude and petroleum products. Treasury Secretary Scott Bessent said each country would be given a specific period to shut down Iran-related activities identified by Washington.

The scope is wide. Targeted networks operate through the United Arab Emirates, China, Hong Kong, Singapore, Switzerland, Europe and elsewhere. Washington accuses these networks of helping transport Iranian oil and channeling revenues to the Islamic Revolutionary Guard Corps and its Quds Force, both designated by the United States as terrorist organizations, as well as to other entities within the Iranian government. Shipping companies registered in Dubai and Ajman and individuals based in the UAE appear on the new sanctions list, placing Gulf commercial centers directly under pressure to tighten scrutiny and enforcement.

The UAE moved first. Days before Monday’s announcement, the country suspended trade and financial dealings with Tehran. Anwar Gargash, diplomatic adviser to the UAE president, said Iranian attacks on Gulf states had backfired by deepening Iran’s isolation. Abdullah Baabood, who writes on international relations, said the UAE decision cannot be explained solely as a response to U.S. pressure. Iranian missile attacks and threats to shipping and UAE vessels have altered Abu Dhabi’s calculations, making continued engagement with Tehran a matter of security risk rather than commercial returns alone.

The costs of that decision are real. The two countries had worked in recent years to expand economic ties despite political differences. In 2024, their joint economic commission met for the first time in a decade to discuss trade, investment and logistics corridors. World Trade Organization data show that about 30 percent of Iran’s imports, worth roughly 21 billion dollars, come from the UAE, while about 13 percent of Iran’s exports, valued at an estimated 7 billion dollars, are destined for the UAE market. Ordinary traders, logistics workers and consumers on both sides of that relationship now face disruption.

Meanwhile, other Gulf Cooperation Council states have shown greater reticence. Saudi Arabia, Qatar, Oman, Kuwait and Bahrain have not publicly endorsed the new sanctions, and the GCC has not issued a collective statement. Their hesitation reflects a difficult calculation: the potential effects on their own security, trading relationships and access to the Strait of Hormuz.

The financial pressure on Gulf businesses and banks is intense. Companies that benefit from the Iranian market must now weigh that business against the risk of losing access to the U.S. dollar, the world’s dominant reserve currency. Ahmed Al-Khazaei, a political consultant with Khuzaie Associates, said transactions with Iran could cost companies their access to the international banking system. Because Gulf economies depend on global financial institutions, Gulf companies and banks would find it difficult to risk those relationships to maintain business with Tehran, according to Qais Al-Astah, a writer and journalist.

Oman presents the most complex case. Its political and commercial ties with Tehran, combined with its role as a mediator in the current conflict, have drawn particular attention. Bilateral trade between Oman and Iran reached about 512 million Omani rials, roughly 1.33 billion dollars, in 2024, a 52 percent increase from the previous year. A preferential trade agreement signed by Muscat and Tehran in May 2025 was expected to push commerce higher still. Baabood said he expects Omani leaders to comply with Washington’s demands in sensitive sectors while trying to preserve political dialogue with Tehran. Muscat is unlikely to openly confront Washington or seek to circumvent the sanctions regime, he said, but it will not easily abandon its diplomatic channels with Iran either. The degree of flexibility Washington is prepared to accept may ultimately determine what Oman can do.

Saudi Arabia may find compliance easier. The country restored diplomatic relations with Iran in 2023, but trade and investment remain limited. Saudi Arabia’s large economy and alternative oil routes give Riyadh more room to maneuver if access to the Strait of Hormuz tightens. Baabood expects Saudi leaders to try to keep political channels open with Tehran regardless.

Qatar shares a gas field and maintains political channels with Iran, though trade and financial ties are smaller than those between Tehran and Muscat. The Qatari Foreign Ministry spokesman offered only a brief, noncommittal comment Tuesday, describing the new U.S. sanctions as “unilateral” and saying Doha supports mediation efforts to resolve the crisis. Kuwait’s trade ties with Iran are limited and shaped by security and political considerations. Bahrain, a close U.S. ally, is unlikely to break with Washington.

The stakes extend beyond commerce. Iranian Economy Minister Ali Madani-Zadeh said his country is prepared for sanctions and that Iran’s response would not remain defensive. An Islamic Revolutionary Guard Corps official threatened to strike vital U.S. interests and energy chokepoints if Iran’s infrastructure were targeted. Iran also issued a warning to vessels against transiting the Strait of Hormuz without its approval and placed dozens of ships on a list it said had violated its instructions, threatening to fine, detain or seize them.

Al-Astah cautioned that Washington’s ability to use economic pressure to change Iran’s policies remains uncertain, noting that decades of sanctions have failed to alter Tehran’s behavior. The immediate question for Gulf states, and for the citizens and businesses that depend on stable energy and trade flows, is not whether the sanctions will ultimately succeed, but how much economic and political disruption they are prepared to absorb while the answer becomes clear.