Strait of Hormuz Oil Crisis: Tanker Traffic Drops Amid Iran Conflict

Global energy markets are facing severe disruption after the effective closure of the Strait of Hormuz, a vital maritime corridor carrying about 20% of the world’s crude oil and natural gas, according to reporting from NPR and Bloomberg. Traffic through the narrow waterway ground to a near-total halt in the opening days of the conflict following Iranian threats, subsequent attacks on vessels, and a subsequent collapse in marine insurance underwriting.

Global crude oil prices have surged by more than 10% since the United States and Israel launched attacks on Iran, with prices trading near $90 a barrel, according to Bloomberg and The Globe and Mail. Energy analysts quoted by NPR describe the supply choke point as the most severe failure point imaginable for global petroleum flows, warning that the crisis threatens to trigger the largest energy shock since the oil embargo of the 1970s.

An Insurance-Driven Shutdown Halts Gulf Tankers

Unlike historical precedents such as the tanker war of the 1980s, Iran brought regional shipping to a standstill without deploying a naval blockade, underwater mines, or mass anti-ship missiles. According to Helima Croft, the global head of commodity strategy at RBC Capital Markets, cited by NPR, Iran achieved the closure through selective drone strikes near the strait. Those strikes caused insurers to refuse underwriting and shipping lines to abandon the route.

Because carriers cannot secure coverage, tankers have increasingly gone dark for extended periods to move remaining crude out of the Middle East, as reported by Bloomberg. Meanwhile, major producers like Iraq are forced to shut down production at some of their largest oil fields because pipeline networks and storage terminals are filling up with crude that cannot be exported through the blocked strait.

Infrastructure Damage and Divergent Market Impacts

The supply crunch extends beyond crude oil to affect liquefied natural gas markets in Europe and Asia, which rely heavily on imported LNG passing through the region. According to NPR, recent military strikes have also hit energy infrastructure in nearby nations including Saudi Arabia, Qatar, and the United Arab Emirates, raising concerns that export reductions could outlast the physical reopening of the strait.

While some Gulf producers can redirect a portion of their output to alternative export ports, those workaround routes cannot absorb the massive volume shortfall. Approximately 20 million barrels of oil normally transit the strait daily. As countries tap existing emergency stockpiles, energy economists note that reserves provide only temporary relief against a persistent structural deficit.

U.S. Policy Response and Industry Skepticism

In response to the mounting crisis, the White House announced that the U.S. government will provide naval escorts for commercial tankers operating in the region. Additionally, the U.S. Development Finance Corporation is prepared to offer reasonably priced political risk insurance to Gulf shipping lines.

Industry specialists remain skeptical about whether government-backed insurance and naval protection will quickly restore normal traffic volumes. According to William Henagan, a fellow at the Council on Foreign Relations cited by NPR, statutory lending and underwriting limits restrict what the DFC can realistically deliver to commercial operators under strict environmental, social, and geographic mandates.