Strait of Hormuz blockade
The U.S. ordered a naval blockade of the Strait of Hormuz, escalating tensions with Iran and contributing to oil prices topping $100 per barrel. President Trump also warned China with a potential 50% tariff if it supplied weapons to Iran, and markets—including China’s CSI300—reacted with downward pressure. (insidenova.com) (indianexpress.com) (livemint.com)
President Donald Trump said the United States Navy would begin blockading ships tied to Iranian ports in the Strait of Hormuz on Monday, pushing oil back above $100 a barrel. (cnbc.com) Trump announced the move on April 12 after more than 21 hours of talks in Islamabad failed to produce a deal to end the war. Central Command later said the action would target vessels entering or leaving Iranian ports and coastal areas, not all commercial traffic using the strait. (reuters.com) (cnbc.com) Brent crude jumped more than 7% in early Asian trading on April 13 and briefly traded above $100, after closing near $94 on Friday. S&P 500 futures and Nasdaq futures also moved lower as investors priced in a wider energy shock. (reuters.com) (telegraph.co.uk) The strait is a narrow waterway between Iran and Oman, but it carries an outsized share of the world’s energy trade. The United States Energy Information Administration said flows through Hormuz averaged 20 million barrels a day in 2024, equal to about one-fifth of global petroleum liquids consumption and more than one-quarter of seaborne oil trade. (eia.gov) That concentration is why even a partial disruption moves prices fast. The International Energy Agency says the channel handled an average 20 million barrels a day in 2025, and its navigable lanes are only about 2 miles wide in each direction at the chokepoint. (iea.org) Trump widened the pressure campaign on April 8, saying any country that supplied military weapons to Iran would face a 50% tariff on goods sold into the United States, with “no exclusions or exemptions.” Reuters reported the threat came hours after he had agreed to a two-week ceasefire with Tehran. (reuters.com) Markets treated China as a likely focus of that warning. China’s CSI 300 index fell on April 13, while the Shanghai Composite slipped about 0.39% to 3,971, according to market coverage published that day. (livemint.com) Iran signaled it would treat approaching military vessels as a breach of the ceasefire, according to Reuters, underscoring how quickly a shipping restriction could turn into a direct naval confrontation. Trump said the blockade was meant to stop Iran from policing the strait and collecting money from ships while the waterway remained under threat. (reuters.com) (cnbc.com) The immediate test is whether commercial tankers keep moving under the new rules without a clash at sea. If they do not, the price spike that followed Trump’s order could spread from oil screens to shipping costs, fuel bills, and broader trade within days. (eia.gov) (reuters.com)
