US-Iran Ceasefire Strikes Trigger Market Volatility as Peace Talks Stall

On May 25-26 2026 the United States launched “self-defence” strikes in southern Iran, hitting missile sites and vessels trying to lay mines near the Strait of Hormuz. The U.S. military said the attacks protected troops from Iranian threats. The operation followed President Donald Trump’s claim that talks were “proceeding nicely.” A ceasefire has held since April 8, and talks have been routed through Doha. Iran’s foreign minister says any deal must also resolve the war with Israel and Hezbollah, while hard-liner Mahmoud Nabavian warned that reopening the strait runs counter to Iranian interests without full sanctions removal.

Al Jazeera (website)

Brent crude rose 2-3 % to $95-99 per barrel; U.S. equities edged higher—S&P 500 +0.6 % to a record, Nasdaq +1.2 %, Dow –0.2 %—as investors priced in a possible deal. MSCI’s Asia-Pacific index gained 0.8 %. The dollar held near 159 yen; the euro at $1.1636. The 10-year Treasury yield hovered around 4.5 %, and 30-year mortgage rates rose to 6.5-6.7 %.

BNN Bloomberg

The Strait of Hormuz moves roughly 20 million barrels of oil daily; its closure forces reliance on reserves, fuels inflation and pushes central banks toward higher-for-longer rates. Higher oil costs have lifted U.S. gasoline prices by 50 % and sparked food-price spikes in the Global South. Rising bond yields raise mortgage rates, tightening credit for households in the United States, Canada and Europe.

Responsble Statecraft

President Donald Trump said negotiations are proceeding nicely. The U.S. military called the strikes necessary to protect troops. Secretary of State Marco Rubio said a deal could take a few days. Iran’s foreign minister in Doha said any agreement must resolve the conflict with Israel and Hezbollah. Hard-liner Mahmoud Nabavian warned that reopening the strait runs counter to Iranian interests without full sanctions lift.

Al Jazeera (website)

Rory Johnston (Commodity Context) warned, “Nothing has fundamentally changed. The strait remains closed.” Bob McNally said, “I’ll believe it when I see it.” Saudi Aramco estimates weeks of mine-clearance before normal shipments resume, underscoring doubts about an immediate return to pre-war flows.

CNN

Brent forecasts diverge: JPMorgan expects $104 per barrel in Q3, while some analysts see $120-130 by year-end. Iranian negotiators propose a 30-day mine-clearance window; U.S. officials suggest “months” before stable flows. No consensus on when the ceasefire becomes permanent, with some calling a “point of no return” for oil markets and others warning of a “red zone” in July-August if supplies stay constrained.

The Guardian

• “Markets are behaving as though a full Iran breakthrough already exists, even though the hardest parts of the negotiation remain unresolved,” — Stephen Innes, SPI Asset Management

Associated Press

• “Nothing has fundamentally changed. The strait remains closed,” — Rory Johnston, Commodity Context

CNN

• “I’m skeptical. I’ll believe it when I see it,” — Bob McNally, Rapidan Energy Group

CNN

• “It just seems to be this endless loop of Charlie Brown and Lucy with the football,” — Michael Every, Rabobank

The Guardian