Brent Gives Back the Blockade Spike as Hormuz Enforcement Goes Live

The Sell-the-News Reversal

Brent spiked more than 8% to above $103 on Sunday after Trump declared a US naval blockade of the Strait of Hormuz, the first time the benchmark crossed the $100 threshold since topping $111 earlier in the week. The move came after JD Vance announced that peace talks in Islamabad had collapsed.

Then the reversal hit. Once the blockade went live at 10 AM ET on Monday, Brent sold off hard, giving back most of the spike to trade near $95. The pattern is textbook — markets priced the headline risk on announcement, then repriced the actual scope once CENTCOM clarified the operational details. US Central Command stated it would only block vessels traveling to and from Iranian ports, explicitly preserving freedom of navigation for all other strait traffic.

This is the second major whipsaw in a week. Brent had already fallen below $92 when the two-week ceasefire was announced, only to get ripped back above $100 on the blockade news. Traders who chased the headline got caught.

A Blockade on Top of a Blockade

The core problem with getting bullish on the US blockade: Iran already strangled the strait. Only 17 vessels crossed on Saturday, down from roughly 130 daily transits before the war. The IRGC has been controlling passage since early March, vetting and authorizing each transit individually.

Maritime intelligence firm Windward's assessment is blunt: "Transit through the Strait of Hormuz remains restricted, coordinated, and selectively enforced. There has been no return to open commercial navigation." The US adding its own enforcement layer on top of Iran's existing restrictions changes the legal and military framing, but the physical reality of choked flows was already baked into price.

What the blockade does change is the diplomatic calculus. With both Iran and the US now actively restricting the strait, the path to normalization gets longer. The ceasefire technically holds until April 22, but the US is now blockading the same ports it was negotiating to reopen.

The Supply Math Ahead

Gulf oil exports are down 60% from pre-war levels — roughly 10 million barrels per day versus 25 million. Around 230 loaded tankers sit anchored inside the Gulf waiting for a corridor that doesn't exist yet. Governments and companies have drawn down an estimated 250 million barrels of crude from reserves since the war started.

Goldman Sachs warns Brent will average above $100 throughout 2026 if the strait stays mostly shut for another month. Wood Mackenzie's modeling is more sobering — even if the strait reopened without restrictions tomorrow, full Middle East oil and gas supply recovery would take several months, extending into late summer. At $100 average Brent, they project global growth slowing to 1.7% versus a pre-war forecast of 2.5%.

The near-term inflection point is April 20, the date JPMorgan flagged as when pre-closure barrels fully exhaust from global supply chains. If the blockade holds and no new diplomatic breakthrough materializes by then, the drawdown from reserves accelerates and the floor under Brent firms up considerably.

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