A much-anticipated deal between the United States and Iran has sent oil prices tumbling and stock markets soaring, but the full details remain shrouded in uncertainty. Under the agreement, brokered by Pakistan, the key Strait of Hormuz waterway will be reopened, US President Donald Trump announced, ending a months-long blockade that has rocked global energy markets.
The deal was announced on 15 June by Pakistan's Prime Minister Shehbaz Sharif, who said an official signing ceremony would take place on Friday, 19 June in Switzerland. Iran's Deputy Foreign Minister Kazem Gharibabadi confirmed in a phone call on state TV that a final agreement had been reached with the US. Trump posted on social media to "let the oil flow!" The agreement includes a 60-day extension of the ceasefire between the US and Iran and the beginning of nuclear negotiations, according to reports.
“The US-Iran deal reopening the Strait of Hormuz explained, including its impact on oil prices.”
The Strait of Hormuz, a narrow waterway between Iran and Oman, is a critical chokepoint for global energy supplies. Normally, around 20% of the world's oil and liquefied natural gas (LNG) passes through it. The strait had been effectively closed since shortly after the US and Israel launched airstrikes on Iran on 28 February, after Tehran threatened to attack vessels using the route. This disruption sent global energy markets on a wild ride. Brent crude, the international oil benchmark, was trading at around $70 a barrel before the conflict started and peaked at about $120 during the war. On Monday, Brent fell 4% to $83.81 a barrel, while US-traded oil dropped 4.7% to $80.89. Asian stock markets also rose sharply, with Japan's Nikkei 225 up 4.3% and South Korea's Kospi gaining more than 5%, as investors welcomed the prospect of stable energy supplies.
For UK readers, the deal matters because Brent crude is the benchmark for UK oil prices, directly affecting petrol and diesel costs. With the UK already facing high inflation and a cost-of-living squeeze, any sustained drop in oil prices could provide relief at the pump. Moreover, the reopening of the Strait of Hormuz is vital for global trade stability, which supports UK supply chains and economic confidence. However, energy analysts warn that the immediate impact may be muted. Vandana Hari from Vanda Insights said a lack of detail on what has been agreed "is likely to inject unease and uncertainty into the market." Andrew Lipow from Lipow Oil Associates added that mines would first need to be cleared from the waterway, a process that could take from a few weeks to up to six months. There is also a large backlog of tankers waiting to use the strait, and restarting oil production and loading ships could take weeks. This means oil prices may remain volatile in the near term.
Q: What is the Strait of Hormuz and why is it important? The Strait of Hormuz is a narrow waterway between Iran and Oman that connects the Persian Gulf to the open ocean. Around 20% of the world's oil and LNG supply passes through it, making it one of the most strategically important maritime chokepoints for global energy markets.
Q: What are the main terms of the US-Iran deal? The agreement includes a 60-day extension of the ceasefire between the US and Iran, the reopening of the Strait of Hormuz, and the beginning of nuclear negotiations. A formal signing ceremony is scheduled for 19 June in Switzerland, with Pakistan mediating.
Q: How will this affect oil prices in the short and long term? In the short term, oil prices have fallen sharply on the news, but analysts caution that volatility will persist due to a lack of detail and logistical challenges such as mine clearance and tanker backlog. In the longer term, if the ceasefire holds and the strait fully reopens, prices could stabilise closer to pre-war levels around $70 a barrel, but much depends on the success of nuclear talks and the pace of production recovery.
What happens next is far from certain. Mine-clearing operations in the Strait of Hormuz could take weeks to months, and a backlog of tankers is waiting to transit. As global markets digest the news, attention will shift to the signing ceremony on 19 June and the start of nuclear negotiations. If the deal holds, it could mark a turning point for energy markets and geopolitical tensions in the Middle East — but as with any fragile peace, the devil will be in the details.