Houthi Strikes on Saudi Tankers Push Brent Past $100 as Red Sea Joins Hormuz as a War Chokepoint

The global oil market is now confronting a scenario it has narrowly avoided for decades: two of the three most critical maritime energy corridors — the Strait of Hormuz and the Bab al-Mandeb Strait — are simultaneously compromised by active conflict. On Thursday, July 23, Iran-backed Houthi rebels struck two Saudi oil tankers in the Red Sea, pushing Brent crude above $100 per barrel for the first time since May.^[1]

The timing is not accidental. Since the US-Israeli war with Iran that began on February 28, Saudi Arabia has rerouted more than 70% of its crude exports through the Red Sea port of Yanbu, relying on the Bab al-Mandeb Strait as a fallback after the Strait of Hormuz became functionally impassable in March. The Houthis’ new maritime embargo on Saudi ports — announced Monday — directly threatens that fallback route. Roughly 4.5 million barrels per day of oil exports from Yanbu are now at risk.^[1]

What happened today

The Houthi military spokesman said the group targeted two Saudi oil tankers — the Encelia and the Layla — with drones and missiles, accusing the vessels of violating the maritime blockade imposed on Saudi Red Sea ports. Saudi state media confirmed a strike on the Encelia, which caused a fire at the bow; all crew were reported safe. No confirmation was given regarding the Layla.^[1]

The UK Maritime Trade Operations Centre separately reported an “unknown projectile” hitting a tanker approximately 130 kilometers from the Saudi coastal town of al-Shuqaiq, causing a fire with no casualties.^[1]

These are the first confirmed Houthi attacks on Saudi vessels since the maritime embargo was declared. They come a week after Saudi missile strikes on Sanaa International Airport, which the Houthis cited as justification for the blockade.^[1]

The chokepoint geometry

The strategic picture is what makes this episode more than a one-day oil spike. The Strait of Hormuz, through which roughly a fifth of global oil and LNG once flowed on 130–140 vessels per day, has been effectively closed since March amid Iran’s IRGC attacks on shipping and a US naval blockade imposed in mid-April.^[1] That closure forced Saudi Arabia to shift the overwhelming majority of its crude through its east-west pipeline to Yanbu on the Red Sea coast.

Data from Kpler and Signal Ocean show about 4 million barrels per day shipping from Yanbu in recent weeks, compared with roughly 973,000 a year earlier.^[2] That Red Sea corridor is now under direct threat from the Houthi blockade of the Bab al-Mandeb Strait.

If Bab al-Mandeb becomes impassable, the only remaining option for Saudi crude bound for Asian markets — the kingdom’s largest customer base — would be rerouting around the southern tip of Africa via the Cape of Good Hope, adding roughly two weeks of transit time and sharply raising freight costs.^[3] Ship-tracking data from MarineTraffic already shows at least seven oil tankers making U-turns near Yemen since the embargo was announced Monday, and the EU’s naval force Aspides has recommended that vessels linked to Israeli, US, or Saudi interests avoid the Red Sea and Gulf of Aden entirely.^[2]

Trump’s escalation threats

President Donald Trump escalated the rhetoric on multiple fronts. On Truth Social, he said the US would hold Iran responsible if Houthi attacks on vessels continue and that “major military punishment” would be inflicted on both Iran and the rebel group.^[1] Earlier in the week, Trump threatened that the US would destroy one Iranian bridge or power plant for every Iranian attack on shipping in the Strait of Hormuz, including infrastructure “located next to, or in” Tehran.^[4]

Meanwhile, US Central Command announced it had completed its twelfth consecutive night of strikes on Iran, targeting military assets including maritime capabilities and missile and drone storage facilities.^[1] Secretary of State Marco Rubio told reporters at an ASEAN meeting in Manila that Iran was privately seeking a deal but was “not ready” to accept one, adding: “They are going to continue to pay a price, and every night the price gets higher and higher and higher.”^[1]

Market reaction

The market response was sharp and bifurcated. Brent crude stood at $100.07 at mid-morning EDT, up 6.38% on the day and more than 33% over the past month.^[1] The United States Oil Fund (USO) gained 5.93% to close at $139.49.^[5]

Among major integrated energy names, ExxonMobil (XOM) closed up 1.58% at $156.89, Chevron (CVX) rose 0.75% to $194.42, and ConocoPhillips (COP) gained 1.19% to $120.20.^[5] Oilfield services lagged — Halliburton (HAL) fell 0.97% to $32.71 and Schlumberger (SLB) dropped 0.94% to $47.22^[5] — suggesting the market is pricing a supply-shock premium rather than a drilling-cycle upturn.

The broader equity market moved in the opposite direction. The S&P 500 shed 0.8%, the Nasdaq fell 1.5%, and the Dow dropped 365 points.^[6] The selloff was amplified by disappointing tech earnings: Alphabet (GOOGL) sank 7.13% to $317.69 after disclosing a $205 billion capital expenditure guidance that raised investor alarm, and Tesla (TSLA) plunged 14.55% to $319.60.^[5] Rising Treasury yields on renewed inflation fears from the oil surge compounded the pressure on equity valuations.^[6]

The signal worth tracking: oil’s move was not a speculative spike — it was a structural repricing of supply risk. When two chokepoints close simultaneously and the only alternative route adds weeks of transit, the market is no longer pricing a transient disruption. It is pricing a persistent floor.

What to watch next

• Houthi enforcement of the Bab al-Mandeb embargo. Whether attacks extend beyond Saudi-flagged vessels to all traffic through the strait will determine if this becomes a global shipping crisis or remains a Saudi-specific disruption. The EU Aspides advisory already recommends broad avoidance of the Red Sea and Gulf of Aden for vessels linked to Israeli, US, or Saudi interests.^[2]

• Saudi rerouting decisions. Saudi Aramco is reportedly in active discussions with Asian refiners about Cape of Good Hope rerouting.^[3] If those talks convert to actual sailings, freight rates and delivery times will rise sharply, compounding the oil price impact even without further attacks.

• Iran’s response to Trump’s infrastructure threats. Iran has vowed “eye for an eye” retaliation.^[4] Any Iranian action against Hormuz shipping following Trump’s bridge-and-power-plant threat would represent a qualitative escalation from the tit-for-tat pattern of the past four months.

• US strike tempo and ceasefire diplomacy. Twelve consecutive nights of strikes with no ceasefire framework, and Rubio’s assertion that Iran is “not ready” for a deal,^[1] suggest the military campaign has no near-term offramp. Markets will be sensitive to any signal from Tehran that it is moving toward negotiations.

• Tech earnings vs. oil as competing narratives. The tech selloff and the oil surge are both risk-off expressions, but they carry different implications. The oil move feeds directly into inflation expectations and Treasury yields. If sustained, it tightens financial conditions independently of whatever the Fed signals — a channel that would eventually pressure equity valuations beyond the tech sector.