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The Strait of Hormuz snapped shut again on Sunday, and the brief window of relief that sent oil prices crashing on Friday closed with it — leaving markets, shipping lanes and diplomatic channels all worse off than before Iran’s foreign minister posted his opening announcement 48 hours earlier.
Brent crude surged nearly seven percent to $96.88 a barrel. American WTI climbed an identical margin to $90.33. Every gain from Friday’s historic drop — the second largest single-session crude decline since the war began — was erased before Sunday trading had properly begun. Dow futures shed 451 points. S&P 500 and Nasdaq futures each fell roughly 0.8 percent, signalling that Wall Street’s record-closing euphoria of 24 hours prior had aged poorly.
What unravelled began on Saturday when Tehran reversed course entirely, announcing a renewed closure of the strait and blaming Washington for what it called repeated breaches of trust. Iranian gunboats then fired on Indian tankers that had attempted to move through the waterway following Friday’s reopening declaration — a clarifying act of force that communicated what the diplomatic language had obscured: the opening had never been unconditional.
Sunday escalated further. US Central Command forces fired multiple rounds at an Iranian-flagged vessel attempting to cross the naval blockade, then seized it. The ship, named the Touska, became the first vessel commandeered in what is rapidly acquiring the character of a naval confrontation layered beneath the ceasefire framework. Iran’s military called the seizure “armed piracy” and warned that retaliation was imminent. Vessel tracking data confirmed what the warnings implied — not a single tanker crossed the strait on Sunday.
The speed of the reversal exposed how fragile Friday’s market reaction had been. Oil traders priced in a diplomatic breakthrough that lasted less than two days. Shipping giants Maersk and Hapag-Lloyd, who had spent Friday afternoon cautiously assessing whether conditions justified a return to the strait, had their answer delivered by gunboats and a seizure order before their crisis committees had finished deliberating.
Read also: US, Iran Begin Scheduled Peace Talks In Pakistan
For American consumers, the trajectory is grimly straightforward. The national gasoline average sits at $4.05 per gallon after briefly tracking toward the $3.65-$3.85 range that analysts had projected following Friday’s crude drop. Energy Secretary Chris Wright said Sunday that prices falling below $3 was unlikely before next year, though he declined to rule out some relief later in 2026. The qualifier did limited work against the underlying message: the war’s energy burden on American households is not lifting soon.
Diplomatically, motion continues despite the deterioration. Trump confirmed Sunday that a US delegation is heading to Pakistan for de-escalation talks, setting Wednesday as a de facto deadline — if no agreement materialises by then, he said, the current ceasefire framework may not be extended. CNN reported that Iranian negotiators were expected in Islamabad by Tuesday, though Tehran had publicly refused participation as of Sunday evening, maintaining the pattern of back-channel engagement wrapped in public denial that has defined the conflict’s diplomatic dimension throughout.
The seizure of the Touska is the development that carries the most immediate danger. Previous naval confrontations had involved Iranian strikes on commercial ships, US interceptions of drones and missiles over Gulf states, and the theoretical threat of Iranian gunboats. An American naval vessel firing on and seizing an Iranian-flagged ship under a ceasefire is a different register of action entirely — one that Iran’s own military has described as piracy and promised to answer. Whether that answer comes before Tuesday’s Islamabad arrivals, or is held back as leverage in the talks, is the question upon which the next phase of the conflict turns.
Read more: President Trump Warns Iran Against Tolls For Hormuz Shipping
The 36-hour arc from Araghchi’s hopeful X post to Sunday’s seized vessel and empty shipping lanes reads, in retrospect, less like a diplomatic breakthrough that failed than like a test — of American intentions, of allied resolve, of whether markets would move enough on an opening announcement to create political pressure for a real one. If it was a test, the results were informative. Oil moved dramatically in both directions. Washington responded militarily. The ceasefire held its name while shedding much of its substance.
Wednesday is now the horizon everyone is watching. The delegations are moving. The Touska is in American custody. The strait is closed. And the war, which was supposed to be ending, is producing new categories of incident instead.
