The Iran-US Standoff: A Chronology of Crisis
A 48-hour ultimatum, a closed strait, and volatile oil markets define the escalating conflict between the United States and Iran.
The United States and Iran are locked in a dangerous standoff following military actions initiated by the US and Israel on February 28. The conflict has centered on control of the Strait of Hormuz, a critical waterway for global energy supplies. President Donald Trump issued a 48-hour ultimatum for Iran to reopen the strait, threatening to bomb Iranian power plants. Iran has responded with counter-threats against regional infrastructure. The situation has caused significant volatility in global oil markets and raised concerns about energy supply and economic stability.
Chronology of Events
February 28: Initial Hostilities
The US and Israel began bombing operations against Iran. During these attacks, Iran's Supreme Leader Ali Khamenei was reported killed; his son, Mojtaba Khamenei, succeeded him.
Late February to Late March: Strait of Hormuz Closure
In response to the military actions, Iran effectively closed the Strait of Hormuz, a waterway facilitating approximately 20% of the world's oil and liquefied natural gas supplies. Some vessels from specific countries have reportedly been allowed passage.
Saturday (Late March): US Ultimatum
President Donald Trump issued a statement on Truth Social at 7:44 p.m. New York time, giving Iran 48 hours to "fully open, without threat," the Strait of Hormuz. Trump stated that if the demand was not met, the US would target Iranian power plants, beginning with the largest one.
Sunday (Late March): Iranian Response
Iran responded through state TV and official statements:
- Parliament speaker Mohammad Bagher Ghalibaf stated that attacks on Iranian power plants would trigger immediate retaliatory strikes on energy and oil infrastructure throughout the region.
- A senior Iranian official added that the headquarters and assets of financial entities purchasing US Treasury bonds would be considered "legitimate targets."
- The Iranian military indicated it would target "all energy, information technology, and desalination infrastructure" linked to the US and Israel in the region.
- Iran also threatened to close and mine the Gulf if a coastal invasion occurred.
Monday (Late March): Military Actions and Market Reaction
- The Israel Defense Forces (IDF) initiated strikes on infrastructure in Tehran.
- Defense Minister Israel Katz stated that the intensity of IDF and US military attacks on Iran was expected to "increase significantly" in the coming week.
- Iran-backed Houthi militants launched ballistic missiles at Israel.
- An additional 3,500 US troops arrived in the Middle East.
- The US accelerated the deployment of Marines and amphibious assault ships to the region.
- Asia-Pacific markets declined, with major indexes in Japan and South Korea falling over 5%.
April 7: Temporary Ceasefire Announced
President Trump announced a temporary US-Iran ceasefire.
June 17: Memorandum of Understanding
The US and Iran signed a Memorandum of Understanding establishing a 60-day negotiation period on Iran's nuclear program and other measures to end the war. Following this, the number of vessels crossing the Strait of Hormuz increased significantly.
Negotiations and Diplomatic Efforts
US-Iran Talks
- President Trump reported that Iran initiated contact with the US seeking a diplomatic resolution.
- Discussions reportedly covered 15 points, including preventing Iran from acquiring nuclear weapons.
- Special envoy Steve Witkoff and Jared Kushner are reportedly leading these talks for the US.
- Mediators Qatar and Pakistan stated that the US and Iran established a communication line to ensure safe passage for commercial vessels.
- The US and Iran met in Switzerland for talks, resulting in the US partially lifting sanctions on Iranian oil exports.
Positions and Statements
- President Trump: Stated "There's got to be a good deal, and it's got to be no more wars, no more nuclear weapons." He also said, "We want it open, we want it free, we don't want tolls." Trump warned he may resume attacks if Iran does not agree to his terms.
- Iranian President Masoud Pezeshkian: Stated "We will never back down."
- Supreme Leader Mojtaba Khamenei: Vowed not to relinquish nuclear and missile technologies and indicated continued Iranian control of the Strait of Hormuz. He issued a directive that Iran's near-weapons-grade uranium should not be sent abroad.
- Secretary of State Marco Rubio: Stated that a proposed toll system in the Strait of Hormuz would make a deal with the US unfeasible.
- Treasury Secretary Scott Bessent: Stated that scaling back and escalating were "not mutually exclusive," adding, "Sometimes you have to escalate to de-escalate." He warned that "all options" remained available to secure Kharg Island.
Reported Demands
US demands reportedly include Iran handing over enriched uranium and committing to end enrichment for at least a decade. Iran maintains its nuclear program is for civilian purposes and denies seeking nuclear weapons.
Strait of Hormuz Status
The Strait of Hormuz has been largely inaccessible since the conflict began. Following the June 17 Memorandum of Understanding:
- Maritime intelligence firm Kpler reported a rise in ships carrying crude oil, LNG, fertilizer, and other goods.
- Maritime risk advisory firm Marisks estimated around 80 ships crossed the strait.
- A limited number of ships can use a northern passageway with Iranian permission.
- The US Navy provided guidance for a southern route cleared of mines.
- Traffic remains below pre-war levels of over 100 ships per day; hundreds of ships are still waiting in the Gulf.
Economic and Market Impact
Oil Prices
Oil prices have experienced significant fluctuation since the conflict began:
- Prior to February 28: Approximately $70 per barrel.
- During late March: Brent crude rose to approximately $112-$116 per barrel; WTI reached nearly $103 per barrel.
- Following the temporary ceasefire announcement on April 7: Prices declined.
- After the June 17 Memorandum of Understanding: Brent crude briefly fell below $72.48 per barrel, the pre-conflict level, before edging up to $72.63.
- Goldman Sachs reported global oil stockpiles are being drawn down at a record pace.
Fuel Prices in the US
- The national average price of gasoline in the US approached $4 per gallon, reaching a high of $3.98 on one Sunday in late March.
- California retail gasoline exceeded $6 per gallon.
- US drivers were estimated to have spent an additional $10 billion on gasoline since the conflict began.
- By late June, the average regular gasoline price dropped to approximately $3.93 per gallon, still above pre-war levels.
Market Analysis
- Chris Weston (Pepperstone): Noted that while Trump has demonstrated instances of de-escalation, he has also shown willingness to proceed with military action when demands are not met.
- Chris Verrone (Strategas Research): Suggested the price difference between Brent and WTI exceeding $14 per barrel might indicate "peak intensity" for the oil crisis.
- Marko Papic (BCA Research): Suggested markets might transition to a "new kinetic equilibrium" where geopolitical friction becomes a constant market factor.
- Goldman Sachs: Identified three factors explaining relative price stability: lower risk premium, destocking, and moderation in spot buying.
Additional Economic Impacts
- Increases in grocery and jet fuel prices were observed.
- Jet fuel reached $195 per barrel by the end of March, leading some airlines to implement additional charges or cancel flights.
- The conflict affected supply of helium, pharmaceuticals, and fertilizer.
- Bloomberg News reported that US government officials and Wall Street analysts considered potential for oil prices to surge to $200 per barrel.
US Administration Actions
- President Trump ordered an investigation into major energy companies, accusing them of not reducing fuel prices despite lower oil costs.
- The American Petroleum Institute stated fuel prices do not move in lockstep with crude oil.
- A UK competition watchdog found no widespread evidence of unfair petrol price hikes, noting profit margins were broadly unchanged between February and March.