A mediation plan to de-escalate US-Iran tensions sent oil prices lower and lifted equity futures, though the Strait of Hormuz remains effectively closed to tracked shipping.
A mediation plan to de-escalate US-Iran tensions sent oil prices lower and lifted equity futures, though the Strait of Hormuz remains effectively closed to tracked shipping.

Mediators presented a plan to ease US-Iran frictions on Monday, pushing Brent crude down more than 2% and lifting Nasdaq futures as traders priced in a lower probability of supply disruption in the Persian Gulf.
"The market is reacting to the first tangible diplomatic signal in weeks, but the gap between a proposal and a deal remains wide," said Helima Croft, head of global commodity strategy at RBC Capital Markets.
Brent crude fell to around $74 a barrel, reversing some of the 8% gain accumulated over the past two weeks as US-Iran rhetoric escalated. Nasdaq 100 futures rose 0.3%, while the VIX edged lower to 19.5. Maritime analytics firm Windward reported zero AIS transits through the Strait of Hormuz — a complete blackout in ship-tracking data for the waterway that handles about 21% of global oil consumption.
The mediation proposal reduces the immediate risk premium embedded in crude, but prediction markets still price a less-than-30% probability of normalized traffic through the Strait by end of June. If talks stall, the oil market could face a supply shock comparable to the 2019 Abqaiq-Khurais attacks, which temporarily removed 5.7 million barrels a day of production.
The plan, brokered by regional mediators, outlines a phased de-escalation beginning with a resumption of commercial shipping through the Strait of Hormuz under international escort, according to people familiar with the matter. Neither Washington nor Tehran has formally endorsed the framework, and both sides have maintained强硬 public positions in recent weeks.
Former President Donald Trump's aggressive statements toward Iran — including threats if the Strait remained closed — had stoked fears of a direct military confrontation. Those fears pushed Brent above $78 a barrel on June 18, the highest level since April. The subsequent retreat reflects relief that diplomatic channels remain open, even if a breakthrough is far from assured.
The stakes extend beyond crude. A prolonged closure of the Strait of Hormuz would ripple through global supply chains, raising shipping insurance premiums — already up 300% since early June — and forcing refiners in Asia and Europe to draw down strategic petroleum reserves. The US holds about 700 million barrels in its Strategic Petroleum Reserve, while Japan and South Korea maintain a combined 90 days of net imports.
For equity markets, lower oil prices reduce input costs for airlines, shipping companies, and consumer goods manufacturers, which helps explain the modest uptick in Nasdaq futures. However, the VIX at 19.5 still points to elevated uncertainty, and options skew in crude remains tilted toward tail-risk scenarios.
The last time the Strait of Hormuz faced a comparable disruption was in 2019, when Iran seized tankers and the US deployed additional naval assets. During that episode, Brent spiked 15% over three weeks before stabilizing as diplomatic channels prevailed. The current situation carries higher stakes given the broader Middle East backdrop and the explicit nature of recent threats.
This article is for informational purposes only and does not constitute investment advice.