US Iran Blockade: Strait of Hormuz and Global Trade Risks

The United States has expanded its maritime blockade in the Strait of Hormuz to target Iranian-linked ships regardless of their location, according to a report from 1News. This escalation marks a significant shift in the U.S. Strategy aimed at pressuring Iran amid ongoing tensions following failed negotiations and military actions in the region.

The blockade, which began in mid-April 2026, was initially imposed on maritime traffic at Iranian ports within the Strait of Hormuz. However, U.S. Officials have now broadened its scope to include vessels associated with Iran wherever they may be operating, effectively extending the economic pressure beyond the immediate chokepoint.

According to CNBC, more than 90% of Iran’s $109.7 billion in annual seaborne trade transits through the Strait of Hormuz, making it a critical lifeline for the country’s economy. The U.S. Central Command confirmed that the blockade had been fully implemented within 36 hours of President Donald Trump’s order, involving over 10,000 U.S. Troops, a dozen Navy ships, and fighter jets operating in the Gulf of Oman and the Arabian Sea.

U.S. Forces have completely halted economic trade going in and out of Iran by sea, stated Brad Cooper, commander of U.S. Central Command. The blockade is estimated to cost Iran approximately $435 million per day in combined economic damage, based on assessments by Miad Maleki, a senior fellow at the Foundation for Defense of Democracies.

The expansion of the blockade comes after a breakdown in negotiations between the United States and Iran in Islamabad on April 11, 2026. A central point of contention was the U.S. Demand to reopen the Strait of Hormuz, which Iran had effectively closed in response to joint U.S.-Israel strikes that began on February 28, 2026. Several hours after the talks collapsed, President Trump announced via social media that the U.S. Navy would impose a blockade on the strait.

Iran has relied on the Strait of Hormuz as its primary route for exporting oil and importing goods. Prior to the conflict, roughly 20% of the world’s oil and natural gas supply passed through the waterway. Since its closure, hundreds of tankers have been stranded in the Gulf, unable to enter or leave through the strait, contributing to volatility in global energy markets.

Despite the U.S. Blockade, some Iran-linked ships have reportedly crossed the blockade lines, according to data cited by the BBC. The development suggests challenges in fully enforcing the maritime restrictions, even as U.S. Forces maintain a strong presence in the region.

The White House has indicated that diplomatic discussions with Iran are ongoing, even as the blockade remains in effect. Officials say they are pursuing a diplomatic solution to the broader Middle East conflict, though no specific timeline or terms have been made public.

As of April 17, 2026, the blockade remains active, forming a key component of U.S. Pressure tactics in the ongoing standoff with Iran. Its expansion to target ships regardless of location underscores the administration’s determination to restrict Iran’s access to global maritime trade routes.