Shell's chief executive has warned that the global oil market is running short of nearly 1 billion barrels of supply, with the gap growing larger each day the Strait of Hormuz stays closed.

The Strait of Hormuz is the narrow waterway between Iran and Oman through which roughly 20% of the world's traded oil normally passes. Its closure following the conflict with Iran has effectively cut off a major artery of global energy supply, forcing buyers to scramble for alternative sources.

How the Shortage Builds

The deficit is not a static number. Each additional day the strait remains shut adds to the cumulative shortfall, compounding pressure on inventories that were already being drawn down before the closure. Shell's CEO framing it as a daily deepening hole signals that the longer a resolution takes, the harder it becomes to refill storage and stabilize prices.

Markets are currently pricing in the possibility of a deal between the U.S. and Iran that could reopen the waterway and restore energy shipments. That hope is providing some floor to sentiment, but no agreement has been confirmed, and the physical supply gap continues to widen in the meantime.

What This Means for Energy Markets

A shortfall approaching 1 billion barrels is a significant number by any measure. Global oil consumption runs at roughly 100 million barrels per day, so the cited deficit represents close to ten days of total world demand that has not been delivered as expected. That kind of gap, if sustained, typically feeds through to higher crude prices, tighter refining margins, and elevated fuel costs for consumers and businesses.

Countries heavily reliant on Middle Eastern crude — including several large Asian importers — face the most immediate sourcing pressure. Rerouting shipments around the Cape of Good Hope adds weeks to delivery times and raises freight costs, neither of which disappears quickly even if the strait reopens.

The key variable now is diplomacy. A U.S.-Iran deal that reopens Hormuz would likely trigger a sharp easing in supply anxiety and a corresponding drop in oil prices. Failure to reach an agreement, or a prolonged negotiation, would keep the deficit growing and push energy markets into a more sustained period of tightness. Traders and buyers will be watching any signal from Washington or Tehran closely.