Strait of Hormuz closure: Oil jumps 6% in 2026

The flashpoint that rattled energy markets

Iran said it has closed the Strait of Hormuz, one of the world’s most important energy chokepoints, citing alleged ceasefire violations by the United States and Israel. The announcement immediately fed into oil-market risk pricing, with global crude benchmarks rising in Thursday trade. Iran’s top military command, the Khatam al-Anbiya Central Headquarters, was cited as announcing the move. The Islamic Revolutionary Guard Corps (IRGC) also said the waterway was closed to all vessels.

The Strait of Hormuz is central to global oil and liquefied natural gas flows, and any disruption can move prices quickly. Analysts warned that renewed restrictions could trigger immediate volatility in crude prices and complicate supply chains. The situation remains contested, with the US playing down reports of a complete blockade.

What Iran announced and who said it

Iran’s messaging was that maritime traffic would not be allowed through the Strait. The IRGC said the route was “closed to all vessels,” including oil tankers and commercial ships. Iranian state-linked messaging also described the Strait as having returned to “strict management and control” by Iran’s armed forces.

The closure was framed as retaliation after fresh US military strikes on multiple sites in Iran, alongside Iranian allegations of continued Israeli military actions in southern Lebanon despite ceasefire commitments. Iran’s position, as described in the material provided, was that these actions amounted to violations of a recently negotiated ceasefire memorandum of understanding (MoU).

Ceasefire allegations at the centre of the decision

Iran accused Washington of a “clear breach of trust” in the implementation of ceasefire commitments. The stated trigger also included Israel’s continued military actions in southern Lebanon despite ceasefire commitments.

Separately, Mohammad Bagher Ghalibaf, described as Iran’s chief negotiator in talks with the US, said on X that it was “not possible” for the Strait to be opened due to “blatant violations of the ceasefire” by the US and Israel. His post cited “US naval blockade” of Iranian ports and “warmongering by Israel on all fronts,” according to the supplied text.

The US response: blockade disputed

The US downplayed reports of a complete blockade, stating that maritime traffic continues to move and that diplomatic channels remain active. This difference in claims is important for markets because prices typically react not only to official declarations but also to whether flows actually stop and for how long.

At the same time, reporting in the provided material also said traffic through the Strait had come to a standstill after Iran seized two ships, including one bound for Kandla port in Gujarat. That detail added to uncertainty around energy cargo movements and insurance, scheduling, and freight costs.

Oil prices jump as traders reprice risk

Crude prices moved sharply as the closure headlines spread. In one update, Brent crude futures rose $1.30, or 2.47%, to $15.40 a barrel, while US West Texas Intermediate (WTI) gained $1.60, or 2.89%, to $12.63. US crude futures were also reported to have been up by more than $1 earlier in the session.

In early Asian trading, Brent was reported up 2.26% at $15.20 and WTI up 2.5% at $12.30. Another intraday data point showed Brent crude up 3.45% to $16.30 per barrel and WTI up 3.41% to $13.63 as of 8:10 am. Separate updates linked to Monday trading showed larger percentage gains, including Brent up 4.72% to $14.65 and WTI up 5.51% to $18.47, and another snapshot showing WTI at $18.98, up 6.12%, with Brent at $15.23, up 5.37% as of 9 am.

Why the Strait of Hormuz matters for global supply

The Strait typically handles around a fifth of global oil and gas shipments, according to the provided text. That concentration makes even temporary restrictions meaningful, especially if ship movements slow due to security concerns, seizures, or uncertainty over rules of passage.

The material also noted that heavy disruption has previously pushed crude prices to “even beyond the $125 per barrel mark,” from earlier levels of $10. While the supplied updates placed Brent mostly in the mid-$10s during the latest move, the reference to prior extremes underlines why markets react quickly to Hormuz headlines.

The India angle: imports, inflation and the rupee

Higher crude prices are generally negative for India because the country depends heavily on imports to meet its energy needs. The supplied text explicitly linked rising oil prices to a higher import bill, pressure on the rupee, and higher inflation over time.

The disruption risk is amplified by sourcing patterns. The material stated that the bulk of India’s LPG imports and 50% of crude imports are sourced from the Persian Gulf, and that these flows have been impacted due to the closure. The report also said one of the seized ships was bound for Kandla port in Gujarat, a detail that highlights potential knock-on effects for specific cargoes and ports.

Government measures and fuel retail status

The material said the Government of India reduced excise duty on petrol and diesel by ₹10 per litre so consumers do not have to pay higher prices at the pump. It also said retail fuel outlets across the country were operating normally, and that there had been no increase in petrol prices at the time of that update.

Alongside fiscal steps, the text noted that the government is diversifying crude imports and increasing domestic production of LPG to enhance energy supplies, positioning these as measures to manage risk during periods of external disruption.

What analysts are watching next

Market participants are largely focused on whether tensions escalate further or move back towards diplomacy. The supplied material said the next direction for crude prices will depend on that balance. It also noted an analyst view that if fighting between Israel, Iran and Hezbollah intensifies and the Strait remains restricted, Brent could test the $100-per-barrel mark again and potentially move higher.

A separate Reuters passage in the provided text described oil prices surging about 6% amid uncertainty around peace talks after escalation in the Strait. It also referenced that both oil contracts had fallen 9% on a prior Friday, their biggest one-day drop since April 18, after Iran said commercial vessels could pass through during a ceasefire. The combination of large up and down moves shows how quickly sentiment is shifting with each update on access and enforcement.

Key numbers at a glance

Conclusion

Iran’s declared closure of the Strait of Hormuz, tied to allegations of ceasefire violations by the US and Israel, has pushed crude prices higher and revived concerns around energy supply routes. The US has disputed the idea of a complete blockade, but reports of ship seizures and disrupted traffic have added to uncertainty. For India, the main channels of risk remain a higher import bill and downstream inflation pressures if crude stays elevated. Near-term market direction will hinge on whether shipping access normalises through diplomacy or whether restrictions harden further.