Brent Hits $100.91, WTI $91.81 After IRGC Seizes Ships April 22

Brent crude reached $100.91 per barrel and WTI hit $91.81 on April 22, 2026 after Iran's IRGC seized two vessels in the Strait of Hormuz and transferred them to Iranian waters. These are the highest oil prices of the Iran-US conflict, and they reversed the ceasefire extension relief in a single trading session.

The sequence tells the story: Brent had retreated to $97.81 after Trump's morning ceasefire extension announcement. The IRGC's same-day ship seizures pushed Brent back above $100 to close at $100.91. Markets spent the day first pricing a ceasefire extension as de-escalation, then repricing IRGC ship seizures as proof the ceasefire extension changes nothing on the IRGC operational side.

The Day's Price Path

April 22 oil price movement, reconstructed from intraday reporting:

Pre-market (before 9:00 IST): Brent at approximately $98-99, markets pricing elevated ceasefire expiry risk as the original April 22 deadline approached without an extension announcement.

9:19 IST — Trump ceasefire extension announcement: Brent pulled back toward $97-97.81 on the de-escalation signal. The relief was immediate but partial — $97.81 is still approximately $18 above pre-crisis levels, reflecting that markets were not pricing a resolution, just a pause.

Afternoon IST — IRGC ship seizure reports confirmed: Brent surged from $97.81 toward $100.91. The move reversed nearly all the morning ceasefire extension relief. WTI moved from approximately $88-89 to $91.81.

Close: Brent $100.91, WTI $91.81. Both represent new crisis highs.

The pattern is the IRGC operationally overriding the ceasefire extension in real time — and the oil market pricing that correctly.

$100.91 Brent: What the Number Represents

The $100 Brent level was identified before this crisis as the analyst estimate for sustained IRGC Hormuz disruption — the level at which active IRGC strait closure would price into the market. The brief $100 touch on ceasefire expiry fear earlier in the day showed the market had internalized that trigger. The $100.91 close confirms it.

At $100.91, the Hormuz risk premium — the amount above estimated fair-value Brent that reflects strait disruption risk — is approximately $20-22 per barrel above pre-crisis baseline. To put that in context:

• 2022 Russia-Ukraine spike: Brent peaked at $139 on a supply disruption of approximately 4-5 million barrels per day (mbpd) of Russian export reduction
• 2020 Saudi Aramco drone attack: Brent spiked approximately $10 on a 5.7mbpd temporary supply disruption, quickly recovered when supply was restored
• Current Hormuz disruption: Estimated 4-5mbpd effective demand destruction (Asian importers unable to receive Gulf shipments), with no clear resolution timeline

The Hormuz disruption is now comparable in scale to the 2022 Russian supply shock, but the resolution timeline is more uncertain. Russia's export reduction had a known structure — Brent eventually stabilised as rerouting to non-EU markets absorbed the supply. Hormuz has no equivalent rerouting option for the 20% of global oil supply that transits the strait.

WTI at $91.81: The US Domestic Premium

WTI at $91.81 is notable because it reflects a US domestic market pricing dynamic that is different from Brent's global Hormuz risk exposure.

WTI typically trades at a discount to Brent because it lacks the premium for international delivery. At $91.81 WTI vs $100.91 Brent, the spread is approximately $9 — wider than the typical $2-5 spread. The wider spread reflects:

US strategic reserve dynamics: The US released Strategic Petroleum Reserve volumes in 2022 to cap domestic prices. The Biden-era SPR drawdown left the reserve at historically low levels. A Trump administration facing domestic gasoline price pressure has limited SPR buffer capacity compared to 2022.

US refinery slate: US Gulf Coast refineries are significant importers of Urals-blend and Latin American heavy crude. The Hormuz disruption affects primarily light-sweet Gulf crude. US refineries are somewhat less exposed to the specific barrels affected by Hormuz closure compared to Asian refineries.

Domestic production: US tight oil production (Permian Basin primarily) is not affected by Hormuz. At $91 WTI, Permian producers are earning significant margins — expect production response within 2-3 quarters, but production cannot respond within weeks.

For developers and infrastructure teams: WTI at $91 is the number that matters for US-region cloud infrastructure energy costs. US data centres use primarily domestic natural gas and regional electricity prices that track WTI more closely than Brent.

Demand Destruction: 4-5 Million Barrels Per Day

The estimated 4-5mbpd demand destruction from Hormuz disruption has held consistent across market analyst estimates since the blockade began. To contextualise the scale:

• Global oil consumption is approximately 102-103mbpd
• Hormuz disruption represents approximately 4-5% of global supply
• The 2022 Russian supply reduction peaked at approximately 4.5mbpd before rerouting
• The 1973 Arab Oil Embargo cut approximately 4.5mbpd

At these disruption levels, oil markets historically do not find equilibrium until either supply is restored or demand destruction in price-sensitive markets (Asian manufacturing, European transport) reduces demand to match the reduced supply. At $100+ Brent, demand destruction begins manifesting in industrial consumption reductions — primarily in South and Southeast Asian manufacturing hubs that cannot easily switch feedstocks.

For Gulf states specifically: Saudi Aramco's export revenue impact at $100 Brent vs $80 Brent pre-crisis is positive nominally — higher price per barrel. But the disruption affects volume, not just price. Saudi exports through Hormuz are themselves constrained by the blockade dynamics, which means higher Brent does not straightforwardly translate to higher Saudi revenue.

Cloud Infrastructure Cost Trajectory at $100+ Brent

At $100.91 Brent, the cloud infrastructure cost impacts that were modelled at $97 Brent are now in the upper scenario:

Gulf cloud regions (AWS ME-South, Azure UAE North, Google Cloud ME Central):

• Energy cost premium vs EU-West: approximately 35-40% above Q1 2026 baseline
• This gap, sustained for 60+ days, produces Q3 2026 regional pricing adjustments from cloud providers
• GPU compute in Gulf regions is now approximately 40-45% more expensive than AP-Southeast alternatives

US cloud regions:

• WTI at $91.81 produces approximately 15-20% energy cost premium in US-based data centres vs Q1 2026 baseline
• This is below the level that triggers near-term pricing adjustments but is approaching the threshold for Q4 2026 review

EU cloud regions:

• Brent at $100.91 is the global pricing reference for EU data centre energy costs
• EU natural gas prices track oil with a lag — sustained $100+ Brent for 30+ days begins feeding into EU data centre energy cost increases in May 2026

The specific implication for AI inference workloads: at $100+ Brent, the cost difference between running LLM inference in EU-West vs ME regions is approximately 40-45%. If you are running workloads in Gulf regions for latency reasons but have users primarily in EU or US, the latency benefit is no longer cost-justified against the energy premium.

What $100 Brent Means for the Negotiating Table

Oil at $100 creates pressure in multiple directions simultaneously, which is why it matters beyond the energy sector:

US domestic politics: $100 Brent translates to approximately $3.80-4.10 per gallon gasoline in the US (depending on refinery margin). For a Trump administration that positioned itself as lowering energy costs, sustained $100+ oil is politically uncomfortable. This creates pressure on the US side to achieve a faster resolution.

Iran's civilian faction: Higher oil prices would normally benefit Iran, but the blockade prevents Iran from exporting the oil whose price has risen. Iran is watching $100 Brent but collecting approximately $40-50 Brent equivalent on the volumes it can move through shadow routes. The price rise benefits the countries that can export — not the one whose ports are blockaded.

Gulf state sovereign wealth funds: Saudi Arabia, UAE, and Kuwait benefit from higher Brent nominally, but their own transit through Hormuz is constrained. UAE's ADNOC exports are specifically affected by the blockade dynamics. The Gulf states are not uniformly benefiting from $100 oil.

Key Takeaways

• Brent $100.91, WTI $91.81 on April 22 — new crisis highs; IRGC ship seizures reversed the entire ceasefire extension relief in a single trading session; Brent had retreated to $97.81 on Trump's morning announcement before surging back above $100
• $100 is the validated Hormuz disruption level: the brief $100 touch on ceasefire expiry fear confirmed the market's trigger; the $100.91 close on ship seizures confirms IRGC action overrides ceasefire announcements in market pricing
• 4-5mbpd demand destruction: comparable to 2022 Russian supply shock in scale; no rerouting option for Hormuz unlike Russia's export rerouting to Asian markets
• WTI $91.81 vs Brent $100.91 spread ($9): wider than typical; reflects limited US SPR buffer, US tight oil partial insulation, and US refinery slate differences
• Gulf cloud energy costs at upper scenario: GPU compute in ME regions now 40-45% more expensive than AP-Southeast; sustained $100+ Brent for 60+ days triggers Q3 cloud pricing adjustments
• Dual pressure on negotiating parties: $100+ Brent creates US domestic gasoline price pressure (Trump administration) and confirms Iran's shadow fleet revenues are disconnected from spot price (blockade effect)

For the IRGC ship seizure that drove the price surge, read IRGC Seizes Two Ships in Hormuz Hours After Trump Extends Ceasefire. For the TOUSKA cargo finding that preceded this, read TOUSKA Cargo: Sodium Perchlorate Confirmed — Rocket Fuel, Brent Hits $100. For Gulf cloud cost modelling, read Iran Declares AWS, Google, and Microsoft Data Centers Military Targets.