Sixty days. That is all it took for the world to burn through its oil safety net faster than at any point in recorded history. Between March and April 2026, global observed inventories fell by roughly 246 million barrels, according to the International Energy Agency’s May Oil Market Report. The agency called the pace unprecedented. The cause was a partial shutdown of the Strait of Hormuz, the narrow chokepoint that carries about one-fifth of the world’s daily oil supply. The fallout has forced governments to crack open strategic reserves at a scale never attempted before, leaving the cushion between stable markets and the next price shock thinner than it has been in decades.
The numbers behind the record
The IEA documented a 129-million-barrel drop in global observed inventories during March, followed by another 117-million-barrel decline in April. Before the crisis began, total visible stocks stood above 8.2 billion barrels, according to the agency’s March assessment. That means the world lost roughly 3 percent of its accessible oil supply in eight weeks.
The IEA’s April report traced the initial phase of the decline to disruptions at the Strait of Hormuz, through which roughly 20 million barrels of crude and petroleum products normally flow each day. Partial closure of the waterway forced tankers onto far longer routes around the Cape of Good Hope or left them idling while awaiting safe passage. The result was a sharp compression of available supply in consuming regions, well before any formal sanctions or coordinated production cuts could take effect.
The squeeze showed up quickly where it matters most to consumers. Brent crude, the global benchmark, climbed above $120 per barrel by May 2026, up from roughly $85 at the start of the year, according to market pricing data. The U.S. national average for regular gasoline exceeded $4.50 per gallon in late May, based on EIA weekly survey data. Diesel and jet fuel followed a similar trajectory, raising costs for freight carriers, airlines, and virtually any business that depends on road or air transport.
Emergency reserves deployed at record scale
Governments responded with unusual speed. The U.S. Department of Energy launched a Strategic Petroleum Reserve emergency exchange covering 172 million barrels, the largest single-country drawdown on record. The department explicitly tied the action to a broader IEA-coordinated effort that made 400 million barrels available from member nations’ emergency stockpiles. The Associated Press reported the IEA’s formal announcement on March 11, 2026, noting that the combined release dwarfs any previous coordinated action, including the multi-phase response to the 2022 Russia-Ukraine crisis, during which the United States alone released 180 million barrels from the SPR alongside a separate 60-million-barrel commitment from other IEA members.
The U.S. Energy Information Administration’s May Short-Term Energy Outlook reinforces the severity of the imbalance. The EIA projects that global oil inventories will continue declining through the second quarter of 2026 as the Hormuz disruption persists. Even with emergency barrels flowing into the market, the agency’s modeling suggests total stocks are likely to fall further before stabilizing, a signal that government action alone may not be enough to restore balance.
What remains uncertain
The headline figures are stark, but critical details remain unresolved. The IEA announced that member countries agreed to make 400 million barrels available, yet whether all pledged volumes have actually reached refineries or remain partially committed on paper is unclear from available documentation. Delivery logistics, port capacity, and the willingness of individual governments to draw down their own reserves at the promised pace all introduce friction between announcement and execution.
The precise volume of crude rerouted or stranded because of the Hormuz restrictions is also hard to pin down. The IEA’s monthly reports describe the disruption in qualitative terms rather than quantifying diverted barrels. That gap matters for anyone trying to forecast what comes next: if most of the inventory decline reflects temporary shipping snarls, stocks could rebuild relatively quickly once the strait reopens fully. If it reflects deeper structural shortages, tightness could persist well beyond the current crisis.
No IEA member government has published a detailed timeline for refilling strategic reserves after the emergency release. The U.S. Energy Department has outlined the procedural mechanics of its SPR exchange, which requires participating companies to return oil at a later date, but it has not committed to specific purchase schedules or price thresholds for restocking. Before this latest release, the American SPR held roughly 350 million barrels, already well below the approximately 727-million-barrel peak it reached in late 2009 and the roughly 593 million barrels it held before the large-scale drawdowns of 2022. The current exchange pushes the reserve toward levels not seen since the early 1980s. European and Asian IEA members face parallel questions about how long their buffers will remain depleted and whether they have the fiscal room to buy barrels back at today’s elevated prices.
Then there is demand. The EIA’s projections assume only modest consumption declines in response to higher prices, but those estimates depend on economic growth holding up, efficiency gains materializing, and consumers not pulling back sharply on driving and travel. If high prices curb activity more than expected, inventory draws could narrow on their own. If pent-up travel demand and manufacturing output prove resilient, the squeeze could deepen even with emergency releases in place.
One notable gap in the current picture is the response from OPEC+ producers. Saudi Arabia, the United Arab Emirates, and other Gulf exporters with spare capacity have historically ramped up output during major supply disruptions. So far, the IEA’s reports have not detailed any significant OPEC+ production increase tied to the Hormuz crisis, and the group’s next scheduled policy meeting will be closely watched for signals about whether members are willing to open the taps further.
A thinner safety net for whatever comes next
Stored oil functions as the global energy system’s shock absorber. Commercial inventories let refineries smooth deliveries and ride out unplanned outages. Strategic reserves exist specifically to cushion geopolitical crises. When both are falling at record speed, the market’s capacity to handle the next surprise shrinks considerably. A second supply disruption, a severe winter, or a faster-than-expected rebound in demand would hit a system with far less slack than it had at the start of the year.
Price volatility tends to intensify under these conditions. Traders bid more aggressively for marginal barrels, refiners compete for dwindling spot cargoes, and those dynamics ripple through to gasoline pumps and heating bills. Governments, meanwhile, face an uncomfortable calculus: every barrel released today is one fewer barrel available for the next emergency.
For now, the combination of record reserve releases and rerouted shipping has prevented outright physical shortages in major consuming regions. But the underlying data from the IEA and EIA point in the same direction: the buffer is being consumed faster than it can be rebuilt. Unless the Strait of Hormuz reopens fully or demand cools meaningfully, policymakers will soon confront a harder question than how to manage today’s tight market. They will have to decide how much protection to hold back for whatever comes next, knowing the answer may determine whether the next disruption is manageable or catastrophic.
David M. Keller is a finance writer based in Columbus, Ohio, covering personal finance and consumer-focused economic topics. He earned his degree in journalism from Ohio University and began his career reporting on local business and economic trends for a regional media outlet. Since then, he has contributed to a variety of online publications, focusing on clear, practical coverage of topics such as cost of living, debt, and everyday financial decision-making.
