Brent Crude Breaches $100 as Red Sea Attacks Widen Gulf Supply Crisis

Brent crude settled at $100.65 a barrel on Thursday, up $6.58 on the day, a gain of almost 7 percent and the benchmark's first close above $100 since late May. West Texas Intermediate advanced 6.2 percent to $92.19. The trigger was a pair of attacks that the oil market had spent weeks hoping would not happen: Houthi fighters struck Saudi tankers in the Red Sea, hitting the detour route that had kept Gulf barrels moving while the Strait of Hormuz sits paralyzed.

Reports last week identified two Saudi vessels, the Encelia and the Layla, as targets of the strikes, and Al Jazeera reported that one tanker was left ablaze. The Washington Post reported that the attack on Saudi shipping widened the risks of the war that has consumed the Gulf since early July. The assaults followed a declaration by the Houthis on July 20 of a naval blockade covering Saudi, Israeli and US-linked tankers passing the Bab el-Mandeb strait at the Red Sea's southern gate.

Two chokepoints, one squeeze

The oil market entered the week already carrying an extraordinary amount of strain. Iran moved against traffic through the Strait of Hormuz earlier in July in retaliation for American and Israeli strikes, choking a waterway that ordinarily handles about a fifth of the world's oil. CNBC reported that tracked transits collapsed to as few as six vessels in a single window, against a norm of 18 to 22 daily crossings earlier in the month. Crude has climbed more than 30 percent in July as the confrontation deepened; Brent traded at $89.22 as recently as July 20.

The escalation has been methodical rather than sudden. Early in the month, oil jumped after attacks on tankers near Hormuz and after Washington revoked an authorization covering Iranian sales, CNBC reported at the time. Al Jazeera reported that prices surged again on July 8 as American forces struck Iranian targets, erasing a brief return to pre-war levels. By July 13 the two sides were trading attacks over the strait itself, and by July 20 Brent had ground up to $89.22 even before the Red Sea became a second front. Each rung of the ladder has been higher than the last, and none has yet been climbed back down.

What kept the disruption from becoming a full-blown supply emergency was geography. Saudi Arabia can move crude westward by pipeline to terminals on the Red Sea, bypassing Hormuz entirely, and that corridor became the market's pressure valve. The Houthi blockade takes direct aim at it. As Al Jazeera's analysis put it, targeting Red Sea shipping imperils the critical detour that Riyadh had used to keep exports flowing. With Bab el-Mandeb now contested alongside Hormuz, both of the Gulf's maritime exits pass through hostile water.

Blockade by unwritten rules

How severe the new chokepoint proves depends on rules the Houthis have not published. Michelle Bockmann, an analyst at the maritime intelligence firm Windward, told Al Jazeera there is "no complete clarity on what the blockade means" and described the group's enforcement as mercurial. Early evidence suggests the campaign is keyed to a vessel's national affiliation rather than its cargo. Chinese-owned ships were given what Bockmann called a free pass during the group's earlier campaign against Israeli and US-linked shipping between 2023 and 2025, and analysts are now watching whether Chinese-chartered tankers loading at the Saudi terminal of Yanbu are waved through the strait, according to the same reporting.

Riyadh's response arrived quickly. The Saudi-led coalition carried out airstrikes on Houthi military sites in Yemen's Hodeidah governorate on Friday, saying the locations had been used to threaten commercial shipping, Al Jazeera reported. The operations were the kingdom's first of their kind in years and a rupture of the uneasy calm that had held between the kingdom and the group since the truce era. Each retaliatory cycle raises the probability that tanker owners simply refuse the route, an outcome that would constrict supply as effectively as any missile.

Depleted buffers, little margin for error

The reason a regional shipping dispute now moves global prices by 7 percent in a session is that the cushions are gone. Rachel Ziemba of the Center for a New American Security told Al Jazeera that crude inventories remain depleted from the earlier phase of the Hormuz crisis, leaving consuming nations with thin buffers against a second shock. Analysts had warned through mid-July that slowing Hormuz traffic combined with drawn-down stocks could carry prices past $100 a barrel, a threshold that arrived on Thursday. China is the swing variable: its restrained buying has historically damped rallies, Al Jazeera noted, and its import behavior in the coming weeks is one of the few forces that could cap the move.

Equity markets sorted themselves along predictable lines. US energy shares rose as Brent crude touched $100, US News reported, even as the broader market slumped, with the Dow Jones Industrial Average down 1 percent and the Nasdaq Composite off 2.2 percent on Thursday amid a parallel scare over technology capital spending. For producers outside the Gulf, the crisis is delivering windfall economics; for nearly everyone else, it functions as a tax.

Costs land at the pump

Consumers will feel the escalation with a short lag. The US average gasoline price stood at $4.09 a gallon late last week, with diesel at $5.34, and Al Jazeera reported that pump prices are expected to climb by 10 to 20 cents over the following one to two weeks as the crude surge filters through. Patrick De Haan of GasBuddy noted that diesel faces the sharper squeeze, because Ukrainian drone attacks have knocked out Russian refining capacity and tightened distillate supply just as the Middle East premium widens. Diesel is the freight fuel, which means the pressure propagates into shipping rates and food prices rather than stopping at the filling station.

The macro consequences compound from there. The Federal Reserve meets this week facing an oil price that has risen by nearly a third in a month, an awkward input for any argument that inflation is safely contained. Households in Europe and Asia, more exposed to imported energy than American ones, face a harsher version of the same arithmetic.

For now, the highest-frequency indicator in global markets is not an economic release but the tanker trackers watched by analysts like Bockmann. Every laden vessel that clears Bab el-Mandeb unmolested is evidence the blockade is porous; every ship that turns away, or burns, argues that $100 Brent crude is a floor rather than a peak. The market's message on Thursday was that it no longer assumes the barrels will always find another way out.