US-Iran Ceasefire Nears Expiration as Naval Seizure Stalls Islamabad Peace Talks

A two-week ceasefire between the United States and Iran is set to expire on Wednesday, April 22, 2026, with negotiations in Islamabad stalled after the US Navy seized an Iranian-flagged tanker in the Gulf of Oman on Sunday, April 19, triggering Iranian accusations of piracy and a pledge of a rapid military response. A US delegation including Vice President JD Vance, Special Envoy Steve Witkoff, and Jared Kushner was scheduled to arrive in Islamabad on Monday evening, though Iran had not confirmed whether it would send its own negotiators. The seizure of the vessel — which US forces said had crossed the blockade line near the Strait of Hormuz after multiple warnings — sharply raised tensions just days before the ceasefire deadline. Oil prices surged by up to six percent on Monday in response, with Brent crude reaching $97.5 per barrel and WTI climbing to $89.6 per barrel for June delivery.

Iran weighs participation as Islamabad prepares for talks Iran's Foreign Ministry spokesperson Ismail Baghai stated that Tehran had not yet decided whether to send a delegation to Islamabad, saying the United States did not appear serious about its diplomatic efforts. Baghai noted that Pakistan's Army Chief Asim Munir had delivered a new US proposal during a visit to Tehran several days earlier, and that Iran was still reviewing it. Iran's Foreign Minister Abbas Araghchi, in a phone call with Pakistan's Deputy Prime Minister and Foreign Minister Ishaq Dar, said Washington's negotiating demands combined with threats against Iranian ships and ports were „clear signs” — Abbas Araghchi via tagesschau.de of a lack of sincerity. A high-ranking insider told Reuters on Monday that Iran was nonetheless considering participation after all, introducing a degree of uncertainty into the diplomatic picture. Islamabad had visibly prepared for the talks: soldiers were stationed at checkpoints, tourist attractions were closed, and large hotels had been instructed to cancel bookings and keep their premises vacant. The Strait of Hormuz had briefly reopened on Friday after Iran announced it would remain open until the end of the ceasefire, but the waterway was closed again by Saturday, April 18, according to reporting by Handelsblatt.

Trump threatens to destroy Iranian infrastructure if talks fail US President Donald Trump, announcing the Islamabad delegation on Sunday, issued a blunt warning to Tehran. „every single power plant and every single bridge in Iran” — Donald Trump via tagesschau.de would be destroyed if Iran did not agree to US conditions for ending the war. Reuters reported, citing security circles, that Washington was separately considering lifting the Strait of Hormuz blockade — a central point of contention in previous negotiations — as a potential concession. Iran's military leadership, citing state radio, condemned the boarding of the tanker as a violation of the ceasefire and characterized it as piracy, and announced a rapid response without specifying what form that would take. China's Foreign Ministry spokesperson Guo Jiakun called the Strait of Hormuz an international waterway and urged all parties to adhere to the ceasefire agreement and avoid escalation. „We hope that all parties involved act responsibly, adhere to the ceasefire agreement, and avoid an escalation of tensions or an intensification of conflicts.” — Guo Jiakun via tagesschau.de The standoff left the basic assumption among market participants — that talks would take place before Wednesday — intact but fragile, according to Handelsblatt.

Markets show nerves but stop short of panic selling US stock markets opened nearly unchanged on Monday, with the Dow Jones, S&P 500, and Nasdaq all showing minimal movement despite the geopolitical escalation. Market analyst Maximilian Wienke of eToro described the mood as nervous but not panicked, and said he expected major price changes only once the ceasefire expired on Wednesday. US Treasury bond prices fell while yields rose, with two-year bond yields climbing to 3.74 percent and ten-year yields reaching 4.28 percent. Deutsche Bank adjusted its interest rate forecast, with analysts expecting no further rate steps from the Federal Reserve for the foreseeable future. Patrice Gautry, Chief Economist at Swiss private bank UBP, warned of a stagflationary risk — rising prices combined with stagnant growth — particularly for net energy-importing economies, while noting the United States was comparatively better insulated as a net oil exporter. Economists in Europe, Asia, and the United States broadly anticipated further inflation increases as a result of the prolonged crisis.

97.5 (USD per barrel) — Brent crude peak on Monday amid Iran tensions

Brent: 97.5, WTI: 89.6

Key events before ceasefire expiry: — ; — ; — ; —

The US-Israel military campaign against Iran, known as Operation Epic Fury, began on February 28, 2026, and resulted in the death of Supreme Leader Ali Khamenei in the initial strikes. His son Mojtaba Khamenei was appointed Supreme Leader on March 9, 2026. A ceasefire was subsequently agreed, establishing a two-week pause in hostilities. Previous negotiations between the two sides had taken place in Florida in December 2025 and in Paris in January 2026 as part of broader regional diplomacy.