US reserves drain at a record pace as Brent bets on a ceasefire

US reserves drain at a record pace as Brent bets on a ceasefire Traders are pricing a quick end to the conflict, yet a record strategic-stock withdrawal and shrinking global inventories argue against the optimism. Oil prices recovered on Thursday (2026-05-21) after two straight sessions of losses, with Brent crude up 0.77% as a record draw on US crude inventories sharpened worries about tightening global supply.² The rebound underscored how fragile the trade has become. Brent gained about 6% over the week to Friday (2026-05-15) on war risk, slid 5% early on Monday (2026-05-18) when US-Iran tensions appeared to ease, then bounced roughly 3% the same day on fresh supply fears.^1,36 The bull case is loud. Citi told clients on Tuesday (2026-05-19) that it expected Brent to reach $120 a barrel in the near term, arguing the market underprices the risk of prolonged supply disruption, while Wood Mackenzie said prices could approach $200 if the conflict severely cut Middle East flows.⁴ Three things sit awkwardly against that optimism. The first is the pace of stock depletion. The US Energy Information Administration said the country pulled nearly 10 million barrels from its Strategic Petroleum Reserve during the week to 2026-05-11, the largest weekly withdrawal on record.² IEA head Fatih Birol told reporters at the G7 finance meeting in Paris that strategic releases had added 2.5 million barrels a day to global supply.⁶ That is an emergency rate of draw, and it cannot run indefinitely. If governments were confident the conflict would end soon, they would not be emptying strategic tanks at a record clip.² The behaviour of official stockholders fits a market bracing for disruption, not one expecting a fast resolution.⁶ The second is in how prices traded the peace headlines. The Monday (2026-05-18) selloff came on signs that US-Iran tensions had eased, yet the same session reversed higher after a report that Washington had agreed to waive sanctions on Iranian crude during talks.^3,6 Falling on the ceasefire and rising on the supply risk within hours points to a de-escalation that is priced but not believed.⁶ The third is the inventory backdrop. UBS projects global stockpiles could fall near a record low of 7.6 billion barrels by the end of May, and PVM has warned that stocks could reach critically low levels.^5,4 A buffer that thin means any collapse of the ceasefire narrative would hit a market with little slack to absorb it.⁵ These reads are not really in competition. A quick peace would strip out the war premium, yet it would not refill stocks that the IEA says are depleting at a record pace, a tightening that predates the conflict.⁵ What would settle the argument is the path of US reserve releases in the coming EIA reports. A slowing draw would signal Washington thinks the worst has passed; an accelerating one would say the buffer is being run down because the disruption is expected to last.²