US Blockade and Failed Peace Talks Spark Global Oil Supply Fears

President Donald Trump has ordered a naval blockade of the Strait of Hormuz following the collapse of peace negotiations between the United States and Iran. The announcement, made on April 13, 2026, triggered an immediate surge in global energy markets and a decline in stock prices.

The blockade is scheduled to begin at 16:00 on April 13, 2026. Regarding the possibility of further diplomacy, President Trump stated that he is indifferent to whether Tehran reprenne ou non les négociations (resumes negotiations or not).

Market Volatility and Oil Price Surges

Crude oil prices reclaimed the $100 per barrel mark on April 13, 2026, as traders reacted to the failed peace talks and the threat of a supply shock. Market analysts indicate that the blockade of the Strait of Hormuz, one of the world’s most critical oil routes, could severely disrupt global hydrocarbon supplies.

Prior to the resumption of regular trading on April 13, 2026, a weekend market operated by the broker IG indicated that oil prices were expected to rise to approximately $98 a barrel, up from $96.50 on April 11, 2026.

Unless a sudden U-turn emerges, energy markets are set for a rocky open when regular trading resumes tomorrow morning.

Tony Sycamore, market analyst at IG Australia

The price of Brent crude had ended the week of April 11, 2026, at $94.26 a barrel, following a period of significant volatility. Prices had previously peaked at $119 a barrel but fell below $100 on April 9, 2026, after the announcement of a two-week ceasefire.

Analysts at JPMorgan Chase expect oil prices to remain above $100 a barrel throughout the second quarter of 2026 before potentially easing in the second half of the year.

Collapse of Islamabad Negotiations

The blockade follows the failure of marathon negotiations held over the weekend in Islamabad, Pakistan. U.S. Vice President JD Vance led the American delegation, meeting with Iranian and Pakistani officials for 21 hours of talks before departing Islamabad on the morning of April 12, 2026.

Vice President Vance attributed the collapse of the peace effort to the refusal of Tehran to abandon its nuclear weapons program. He stated that the U.S. Team had been clear regarding its red lines during the discussions.

Iranian sources countered these claims, attributing the failure of the talks to excessive demands placed upon them by Washington.

Conflict Background and Strategic Impact

The current diplomatic crisis is part of a broader war that began on February 28, 2026, initiated by airstrikes on Tehran conducted by the United States and Israel. The failure to reach a deal in Islamabad has heightened fears of a prolonged energy shock, especially as large numbers of oil tankers remain stranded in the Gulf.

The Strait of Hormuz serves as a primary transit point for global oil and gas. The imposition of a naval blockade by the United States is expected to increase borrowing costs and further destabilize energy supplies as the risk of a prolonged conflict increases.