Two Chokepoints, One Oil Market: Houthi Blockade Traps Saudi Crude as Brent Breaks $95

The oil market’s escape route is closing. On Monday, July 20, Yemen’s Iran-backed Houthis declared a “maritime embargo” against Saudi Arabia, warning in an email to shipowners that “vessels are banned from loading or discharging cargo at any Saudi ports” and “may be subject to targeting in any location within the operational reach.”^[1] By Wednesday, at least seven oil tankers had made sharp U-turns near Yemen rather than test the threat.^[1] The announcement opens a second front in the energy crisis born of the US-Iran war — and it threatens to shut down the one workaround that had kept crude prices from spiraling even higher.

The workaround that was working

Since the Strait of Hormuz effectively closed to most traffic during the US-Iran conflict, Saudi Arabia rerouted more than 70% of its crude exports from the Gulf to the Red Sea port of Yanbu via its massive east-west pipeline. About four million barrels per day have been flowing through Yanbu in recent weeks, compared with roughly 973,000 a day a year earlier.^[1] That diversion was the single most important reason the oil market hadn’t already blown past $100. Now the Houthis are threatening the chokepoint that receives it.

The Bab el-Mandeb strait — Arabic for “Gate of Tears” — is just 14 miles wide at its narrowest point, about 40% narrower than Hormuz.^[2] Approximately 6.2 million barrels of oil per day have been transiting the strait over the past month, according to Kpler data.^[2] Of that, roughly 2.5 million to 3.5 million barrels per day is Saudi crude heading from Yanbu toward Asia.^[2]

If that route becomes inoperable, the supply disruption turns structural. Helima Croft, head of global strategy at RBC Capital Markets, put it plainly: “If that route becomes inoperable, then the oil supply disruption becomes more serious and we start talking again about a ‘no way out’ situation.”^[2] Dan Pickering, chief investment officer at Pickering Energy Partners, estimates a full blockade could add another $5 to $10 per barrel — pushing oil above $100.^[2]

A tanker burning in Hormuz

The Red Sea threat compounds an already dire situation in the Strait of Hormuz, through which 20 million barrels of oil — 20% of global daily supply — typically transited before the war.^[2] On Thursday, Iran’s Islamic Revolutionary Guard Corps reported that an oil tanker was hit by an explosion in the Strait of Hormuz, forcing two other vessels to turn back. The IRGC warned that “no vessel will be allowed to transit” the waterway.^[3]

Hormuz traffic has slowed to just a handful of crossings per day, down from roughly 50 to 70 daily following the US-Iran Memorandum of Understanding signed in mid-June.^[2] The US Navy, occupied with blockading Iranian ports, is struggling to persuade shipping companies to transit the strait at all.^[2] If Washington must open a new military front against the Houthis, it could stretch American capacity to keep either chokepoint open.

Oil surges, equities buckle

Brent crude settled up $3.06, or 3.36%, at $94.07 a barrel on Wednesday, briefly trading above $95 — the highest since June 8.^[4] West Texas Intermediate climbed $2.49, or 2.95%, to $86.83.^[4] Oil has risen more than $20 a barrel this month since hostilities resumed.^[2]

The Nasdaq led Wall Street lower: the Nasdaq Composite fell 146.30 points, or 0.57%, to 25,690.90; the S&P 500 lost 10.24 points, or 0.14%, to 7,498.96; the Dow slipped 6.06 points, or 0.01%, to 52,218.58.^[5] The slide came as US officials downplayed the chance of renewed peace talks after an 11th straight night of strikes on Iran.^[4] Secretary of State Marco Rubio told reporters that Iran is “not serious about talks.”^[6]

The sector rotation is already visible. Energy stocks — ExxonMobil (XOM), Chevron (CVX), ConocoPhillips (COP) — surged alongside crude benchmarks as investors positioned for a sustained supply shock.^[7] Oil ETFs and shipping stocks rallied as the Hormuz disruption revived the oil-price theme.^[7] Airlines took the brunt on the downside: earlier in the conflict, American Airlines (AAL) fell 5%, United (UAL) dropped 4%, and Delta (DAL) and JetBlue (JBLU) each slipped 3% as crude jumped.^[7] European carriers also slid as Strait of Hormuz risk climbed.^[7]

The diesel angle

The Houthi threat also endangers a quieter trade flow: Saudi diesel to Europe. Approximately 230,000 barrels of diesel per day ship through the Suez Canal from refineries near Yemen, according to Kpler’s Homayoun Falakshahi.^[2] Diesel prices have already surged more than 40 cents per barrel over the past two weeks, compounded by Ukraine’s drone strikes on Russian refineries.^[2] If Saudi diesel shipments through the Red Sea stop, European fuel markets face a supply gap with no easy replacement.

The EU’s naval force in the region, Operation Aspides, has recommended that “merchant vessels linked to Israeli, US or Saudi interests avoid transiting the Red Sea and Gulf of Aden until the threat level decreases.”^[1] That advisory effectively tells the commercial fleet to stay away from one of the world’s most important shipping lanes.

The macro backdrop

The inflation picture was already uncomfortable before this shock. CPI inflation stood at 3.46% year-over-year as of the latest FRED data, well above the Federal Reserve’s 2% target.^[8] The Fed funds rate sits at 3.63%, after a series of cuts that now look insufficient to keep inflation expectations anchored if energy costs keep climbing.^[8] Consumer sentiment has cratered to 44.8, down 14% year-over-year — a level historically associated with recession fears.^[8]

An oil spike toward $100 — or beyond — feeds directly into transport costs, manufacturing inputs, and gasoline prices at the pump. The Fed’s room to ease further narrows with every dollar added to crude. The 10-year Treasury yield at 4.55%^[8] already reflects a market uneasy about sticky inflation; a renewed energy-driven price shock could reverse the easing cycle entirely.

Prediction markets: de-escalation priced, but not certainty

Polymarket traders assign a 63.5% probability to a US-Iran permanent peace deal by December 31, 2026,^[9] and 95.5% odds to a US-Iran nuclear deal before 2027.^[9] But those probabilities sit alongside a 29.5% chance of a full US invasion of Iran before 2027^[9] — a figure that would likely climb if the dual-chokepoint crisis persists. The market is pricing a messy resolution, not a clean one.

President Donald Trump, asked about potential US military involvement against the Houthis, said: “So far, it hasn’t happened. Might happen, but we take care of things. We’ve done that with the Houthis before.”^[2]

What to watch next

• Bab el-Mandeb traffic data. If tanker U-turns accelerate and daily transits drop sharply below the pre-embargo baseline of 20-22 vessels, the “no way out” scenario is materializing. Watch Kpler and Windward tracking data for the next 48-72 hours.

• Brent’s reaction to $95-100. A clean break above $95 that holds into the weekend would signal the market is pricing the blockade as durable rather than performative. Pickering’s $100 threshold is the level to watch.

• US military posture. Any announcement of naval assets redirecting from Hormuz to the Red Sea — or CENTCOM strikes on Houthi positions — would confirm the two-front scenario and likely add another risk premium to crude.

• Saudi pipeline capacity. If Bab el-Mandeb closes, Saudi Arabia’s only alternative is to route oil through the Mediterranean and around the Cape of Good Hope to Asia — adding weeks of transit time and significant freight costs.^[1] Watch for any Saudi statement on Yanbu throughput or pipeline utilization.

• Diesel and distillate spreads. European diesel cracks have already widened. If Saudi diesel flows through Suez stop, European refining margins and distillate spreads will widen further — a leading indicator of broader energy inflation.

• Fed speak and inflation expectations. Any pivot in Fed officials’ language toward energy-driven inflation risk, especially ahead of the next FOMC meeting, would mark the moment the geopolitics story becomes a monetary policy story.

The pattern here is familiar: a proxy force threatens a chokepoint, traffic slows, the market adds a risk premium, and the question becomes whether the threat is enforced or merely announced. What makes this episode different is that the first chokepoint — Hormuz — is already largely closed. The Houthis aren’t opening a second front; they’re threatening to close the door on the only exit that was still open. If they succeed, the oil market loses its last workaround, and the math changes.