Brent Crude Surges 6% Above $108 as Houthis Threaten Two Chokepoints

#

Brent crude surged 6.3% to above $108 per barrel on 10 September 2026, its largest single-session gain in months, after Houthi forces seized the Yemeni port city of Mokha and positioned themselves within 75 kilometres of the Bab al-Mandeb Strait.

This move is structurally different from earlier Houthi-linked price spikes. For the first time in the current conflict, simultaneous physical pressure on both the Strait of Hormuz and the Bab al-Mandeb has shifted the market’s framework from a geopolitical risk premium to a credible physical supply delivery threat.

Here is what the session actually tells you: why oil markets moved this sharply, what dual-chokepoint exposure means for global supply flows, and which variables will determine whether prices hold above $100 or retreat.

One port city, two threatened chokepoints, and a market that finally priced physical risk

Houthi forces expelled Saudi-backed government troops from Mokha on 10 September 2026, then pushed south along the Red Sea coastline toward Dhubab and, according to some accounts, the Hanish Islands. The territorial gain matters less as a battlefield outcome than as a geographic one.

Mokha sits roughly 75 kilometres from the Bab al-Mandeb gateway. Control of that stretch of coast hands the Houthis direct leverage over one of the two maritime corridors through which approximately 25% to 30% of the world’s daily seaborne oil and gas moves.

The other corridor, the Strait of Hormuz, is already under strain from the US-Iran standoff. This is the first occasion in the current conflict where both chokepoints face simultaneous, credible physical pressure at the same time.

The two chokepoints are not interchangeable, and maritime chokepoint exposure affects importers differently depending on whether their supply routes run through Hormuz, Bab al-Mandeb, or both simultaneously.

That is why the price move looked outsized. Brent touched an intraday high above $108 before settling at $107.63. West Texas Intermediate (WTI) closed at $102.48, a 6.7% gain on the session.

The clearest evidence that operators reacted within hours came from the water itself.

That collapse in crossings is what separated Thursday’s move from the geopolitical premium spikes that came before it. Shipping operators were not pricing a hypothetical future risk; they were changing their behaviour on the day, and the market read that response directly.

The two chokepoints are not interchangeable, and that difference shapes the risk.

Hormuz has no escape valve. Bab al-Mandeb can be circumvented, but only at a cost that reroutes freight for a fortnight and pushes insurance premiums higher. With both under pressure at once, the market stopped treating this as a pricing story and started treating it as a delivery one.

How the Trump administration’s Iran stance removed the diplomatic pressure valve

If the physical risk is the accelerant, the absence of a diplomatic off-ramp is what makes it persistent. President Donald Trump has publicly stated he is not pursuing negotiations with Iran and expects elevated prices to run through the November midterm elections.

That position did not arrive in isolation. It is the endpoint of a sequence of closed doors under the administration’s “maximum pressure” campaign, aimed at driving Iranian oil exports toward zero.

Alongside these actions, the US Treasury has sanctioned more than 50 individuals, entities and vessels tied to Iranian petroleum exports, and a US Navy presence has cut into Iran’s crude export capacity.

Iran, for its part, has said it has no intention of returning to the table. With both sides declining to engage, there is no near-term channel through which the geopolitical premium could be talked down.

For readers wanting to understand the mechanics behind the maximum pressure campaign in more depth, our full explainer on US sanctions against Iranian oil exports details how OFAC designations, shadow fleet interdiction, and secondary sanctions work together to restrict Iranian crude from reaching buyers.

That matters for how you read Thursday’s price. This is not a spike the market expects to unwind quickly. The successive closure of diplomatic pathways means the floor under oil has been rising incrementally since July, and there is currently nothing on the calendar to pull it back down.

What an SPR near operational limits means when prices are already above $107

The conventional stabiliser for a US oil shock is the Strategic Petroleum Reserve. Right now, that buffer is thinner than it has been in four decades.

The SPR has fallen to its lowest level since the 1980s, dropping below 300 million barrels after a 172-million-barrel drawdown in direct response to the Iran conflict, layered on top of earlier coordinated international releases totalling around 400 million barrels. Original source data placed the reserve at 285.4 million barrels for the week ending 4 September 2026, a year-over-year fall of 119.9 million barrels, or 29.6%. The EIA’s figure of 286.6 million barrels for the week ending 28 August 2026 confirms the same picture, sitting alongside 424.5 million barrels of commercial crude.

The SPR depletion trajectory has been steepened further by policy decisions that ran in parallel with the Iran sanctions campaign, including exploratory moves toward Venezuelan crude as an alternative fill source, none of which have added materially to reserve levels.

The headline number understates the constraint, because not all of those barrels can actually be deployed.

Why the caverns themselves are now a constraint

The reserve is stored in underground salt caverns, and pulling oil out too fast alters their geometry. That reduces extraction efficiency over time and erodes the system’s ability to respond quickly in a genuine emergency. Some expectations point to stocks falling toward 243 million barrels (unverified), which would push the reserve below its statutory drawdown floor entirely.

Here is the read you should take. Only about 32 million barrels separate the current level from the legal floor, and more than 100 million barrels cannot be deployed at all. The government offset that historically helped contain a price spike is now operating at a fraction of its effective capacity, which means any further disruption lands with far less of a cushion beneath it than markets may be assuming.

How much risk is already in the price, and where analysts disagree

The next question is whether $107 is a fair reflection of the risk or an overshoot. On this, the major forecasters split into two coherent and opposing frameworks.

Goldman Sachs and Wood Mackenzie sit on the upside. Goldman estimates the market is currently carrying a geopolitical risk premium of $14 to $50 per barrel, and argues investors may be underpricing severe chokepoint disruption. Wood Mackenzie goes further on the tail scenario.

The European Central Bank offers the counterpoint. Its historical analysis finds no clear relationship between geopolitical events and sustained oil price moves, and warns that financial markets can overshoot fundamentals through what it calls a “risk channel.”

There is a downside anchor worth noting. Goldman previously forecast a 2026 Brent average near $83 (unverified). The gap between $107 spot and an $83 full-year average tells you Thursday’s price embeds a very large assumption about sustained disruption.

The speed of the earlier retreat shows how fast that assumption can reprice. Brent’s monthly average fell from $117.29 in April 2026 to $85.40 in June 2026, and by 11 September it had already moderated to a range of $104.05 to $104.77, with WTI between $100.41 and $100.69.

The disagreement is more useful than any single forecast. The variables the analysts name, Hormuz closure duration, diplomatic re-engagement and SPR capacity, are the same ones you should watch to judge whether this is a durable shift or an overshoot.

The variables that will determine whether $107 holds or retreats

The forward view is not a prediction so much as a decision tree. Three observable variables now drive the price, and each sends a clear signal.

Institutional forecasters are already treating the supply impact as structural.

Treat that revision as confirmation that Thursday’s move is priced with some justification, not dismissed as market noise. One partial offset does exist. US net exports of crude and petroleum products averaged 4.0 million barrels per day over a recent four-week period, up from 2.4 million bpd a year earlier, while distillate exports rose to 1.67 million bpd from 1.34 million bpd. One referenced week saw total crude exports hit a record 6.44 million bpd (unverified, attributed to the week ending 24 April 2026).

American barrels can soften the blow for importers, but they cannot substitute for the volumes at risk if either chokepoint closes. Hormuz, in particular, has no bypass, and the Cape of Good Hope reroute for Bab al-Mandeb adds 10 to 15 days and steep freight costs.

What a dual-chokepoint world means for energy markets beyond this week

The significance of Thursday’s session is not the price on the screen. It is what drove it: simultaneous, credible physical pressure on two chokepoints, with no diplomatic off-ramp currently in sight.

The conventional stabilisers are all compromised. SPR releases are constrained near the 252.4-million-barrel statutory floor, diplomatic de-escalation is absent, and the Cape of Good Hope reroute adds 10 to 15 transit days at materially higher cost.

That spring retreat is not evidence this spike reverses on its own. It is evidence that diplomatic re-engagement, when it appears, can reprice the geopolitical premium within weeks. The pace of any political signal matters as much as its content.

So here is the structural frame to carry forward. Any Brent print above $100 reflects a dual-chokepoint discount on global supply delivery, and the exit from that regime depends on political variables, not market ones. The single development that could move the outlook fastest in either direction is a credible signal of US-Iran re-engagement, something markets have already shown they can price inside a single session.

For readers wanting to track how political signals translate into price moves across the full 2026 cycle, our dedicated guide to geopolitical tension and oil price volatility covers the documented relationship between diplomatic events and Brent price inflection points from January through September.