--- title: "Oil Jumps on US-Iran Fighting and Strait of Hormuz Blockade Threat" description: "Crude oil has surged this week after the United States and Iran traded strikes and President Trump threatened to blockade the Strait of Hormuz, the channel that carries about a fifth of the world's oil. Brent settled near $85 a barrel on July 14 after one of its biggest single-day jumps since 2020." category: "Markets" category_url: https://boursel.com/category/markets author: "Hannah Blackwood" published: 2026-07-14T19:27:00.000Z updated: 2026-07-14T19:27:00.000Z canonical: https://boursel.com/article/oil-jumps-on-us-iran-fighting-and-strait-of-hormuz-blockade-threat tags: ["oil", "commodities", "iran", "geopolitics"] --- # Oil Jumps on US-Iran Fighting and Strait of Hormuz Blockade Threat Crude oil has surged this week after the United States and Iran traded strikes and President Trump threatened to blockade the Strait of Hormuz, the channel that carries about a fifth of the world's oil. Brent settled near $85 a barrel on July 14 after one of its biggest single-day jumps since 2020. Oil prices have climbed sharply this week as fighting between the United States and Iran reignited fears over the Strait of Hormuz, the narrow waterway through which a large share of the world's oil is shipped. The rally included one of crude's largest single-day gains in years, and prices held near multi-week highs even after coming off their peaks. ## The move Crude jumped roughly 9% in a single session, [Brent's biggest daily gain since 2020, after President Trump said the US would reimpose a naval blockade on Iranian vessels using the Strait of Hormuz, according to CNBC](https://www.cnbc.com/2026/07/12/oil-price-strait-hormuz-iran-trump-tanker.html). The surge carried Brent, the international benchmark, into the low-to-mid $80s and West Texas Intermediate, the US grade, into the high $70s. By Tuesday, July 14, the market had steadied. [WTI rose about 1.8% to roughly $79.56 a barrel and Brent about 2% to roughly $84.95, easing off the session's highs after Trump backed away from a demand that ships pay a 20% fee to pass through the strait, CNBC reported](https://www.cnbc.com/2026/07/14/oil-prices-today-brent-wti-hormuz-trump-toll-iran.html). That give-back is a useful reminder that much of the move is a risk premium: a price cushion traders add for the possibility of disruption, which deflates quickly when the threat eases. ## What is driving it The immediate trigger is military. US forces and Iran have exchanged strikes, and Washington's threat to interdict shipping raised the prospect that oil leaving the Gulf could be blocked, delayed or rerouted at higher cost. Because so much of that oil moves by sea through a single channel, even the risk of interference is enough to move global prices. ## Why the Strait of Hormuz matters so much The Strait of Hormuz is the only sea route out of the Persian Gulf, the exit for crude from Saudi Arabia, Iraq, Kuwait, the United Arab Emirates and Iran itself. [Roughly a fifth of the world's oil supply, along with a large share of its liquefied natural gas, passes through it, and unlike some other chokepoints there is no easy way to route around it, Britannica notes](https://www.britannica.com/topic/How-Much-Oil-Passes-Through-the-Strait-of-Hormuz). That combination, enormous volume and no ready alternative, is why traders react so strongly to any threat to the strait. ## What to watch For now, the picture is a market pricing in risk rather than an actual, confirmed loss of barrels. If shipping keeps flowing and the fighting cools, history suggests the added premium can fade as fast as it appeared, as Tuesday's pullback hinted. If tankers are genuinely blocked or attacked, the effect would be larger and longer-lasting. Either way, the episode is a reminder that the price at the pump remains tethered to events in one stretch of Gulf water, and Boursel does not forecast where prices go from here. ## Sources - [Brent oil jumps more than 9%, biggest daily gain since 2020, after Trump reinstates Iran blockade](https://www.cnbc.com/2026/07/12/oil-price-strait-hormuz-iran-trump-tanker.html) - [Oil prices today: Brent, WTI rise as Hormuz tensions build](https://www.cnbc.com/2026/07/14/oil-prices-today-brent-wti-hormuz-trump-toll-iran.html) - [How Much Oil Passes Through the Strait of Hormuz?](https://www.britannica.com/topic/How-Much-Oil-Passes-Through-the-Strait-of-Hormuz)