The thin blue line: OPEC+ spare capacity below four million barrels a day is the metric to watch.
Production buffers across the cartel have eroded steadily through Q1 2026. With Saudi Arabia carrying sixty-three percent of the headroom, a single supply incident could absorb half the global cushion in a week.
Production buffers across the OPEC+ alliance have eroded steadily through the first quarter of 2026. As of the IEA's May Oil Market Report, 3.8 mb/d of spare capacity remains in the system — the tightest reading since February 2022 and roughly 0.3 mb/d below the five-year average.
The concentration matters as much as the total. Saudi Arabia alone accounts for 2.4 mb/d of the cushion, with the United Arab Emirates contributing a further 0.9 mb/d. The remaining 0.5 mb/d is distributed across five other producers — each carrying less than one hundred and fifty thousand barrels of headroom.
A coordinated supply incident in the Persian Gulf could absorb half the global cushion within seven days.
That arithmetic is what gives the HORMUZ-2026 scenario its uncomfortable weight. In our base case, two-thirds of available spare capacity is mobilised by day three; the cushion does not recover to its pre-incident level for fourteen weeks.
European gas storage continues its seasonal refill at 78.3%, well above the five-year mean, and the FAO Food Price Index has ticked up to 121.4 points. Two prospective scenarios — Strait of Hormuz transit disruption and Black Sea grain corridor closure — remain in elevated watch status.