Macquarie Sees Brent at $130 by Labor Day if Hormuz Stays Closed as Global Stocks Draw at 5 Million Barrels Per Day

The Strait of Hormuz closure has cut roughly 14 percent of global oil supply, the largest single disruption in recorded history. Yet WTI crude was trading at $90.12 per barrel and Brent at $93.00 per barrel as of late morning Thursday on the CME and ICE respectively, per Rigzone. Macquarie Group Chief Economist Ric Deverell attributes the muted price response to an inventory buffer: pre-war global oil stocks were very high and are now being drawn down rapidly.

The Inventory Countdown Clock

Macquarie estimates global oil inventories are drawing at approximately 5 million barrels per day. At that pace, the firm projects that stocks will reach 2025 seasonal lows by early July 2026, roughly 25 to 30 days from now. A second milestone follows: 2022 price-spike troughs by early August. Working the math forward, 30 days at 5 million barrels per day consumes 150 million barrels from the buffer. Deverell summarized the dynamic using a phrase drawn from Harold Macmillan: "inventories, my dear boy, inventories."

If the Strait remains closed to Labor Day on September 7, 2026, Macquarie forecasts Brent crude between $130 and $150 per barrel. If the conflict extends into 2027, Deverell said prices around $200 per barrel "may be needed to balance supply and demand." Those scenarios assume no alternative supply routes offset the 14 percent reduction from Hormuz.

Where Forecasters Diverge

BMI Research forecasts Dated Brent at $88 per barrel for the full year 2026 and $72.50 per barrel for 2027. BMI's base case implies the Strait partially reopens or alternative supply materially offsets the disruption before inventory levels reach critical thresholds. Goldman Sachs, whose $82 Q3 Brent target was $12 below Brent's settlement price when Oil Authority last reported the divergence in our Goldman and Rystad forecast analysis, now sits $11 below Thursday's late-morning Brent price of $93.00.

The three active Q3 forecasts span $48 to $68 per barrel: Goldman at $82, BMI at $88, and Macquarie between $130 and $150. All three cite Hormuz as the central variable. The spread reflects fundamentally different assumptions about closure duration, not disagreements over demand. Macquarie prices a full-duration closure; Goldman prices a ceasefire or reopening before the quarter ends; BMI sits in between.

Canadian Oil in a $130 Brent World

The Macquarie scenario's Canadian implication follows directly from current differentials. Western Canadian Select was quoted at approximately $80.69 per barrel on Thursday morning, per OilPrice.com, on an 11-hour reporting delay. The WCS-WTI differential stood at approximately $9 per barrel, within the range Oil Authority reported when the spread narrowed to $8.61 as Pacific Rim refiners shifted to Canadian heavy crude. In a $130 Brent scenario, holding the current $2.88 Brent-WTI spread and $9 WCS-WTI discount constant, WCS would approach $118 per barrel.

The Buffer Becomes the Risk

The pre-war inventory surplus that has kept prices below $100 is also the market's primary cushion against a further disruption. When those buffers drain toward 2022 troughs, as Macquarie projects by August, any secondary supply shock from Iraq, Oman, or the Gulf states would hit a market with no reserve capacity. U.S. crude stocks have recorded six consecutive weekly draws, per the EIA's June 3, 2026 weekly report covering the week ending May 29, 2026, with inventories sitting 3 percent below the five-year seasonal average.

The countdown clock Macquarie describes is already running.