A World Living Off Its Oil Reserves
The US/Iran conflict started in Feb 2026 and it has effectively closed the Strait of Hormuz, not a day goes by without seeing a new headline on the topic. Before the war, 20M barrels of oil per day were shipped through that stretch of water, ~20% of global oil supply and Brent was ~$70 a barrel. Right now, export volumes are running at less than 10% of pre-conflict levels.
The world has been living off its strategic reserves ever since, with most coverage focusing on the daily oil price and ceasefire rumours. The more worrisome questions are: how much oil is left in those reserves, what it will cost to rebuild it, and what the global economy looks like if this does not get resolved before December.
What the Oil Reserves Look Like Currently
The International Energy Agency's (IEA) 32 member countries (US, UK, Japan, Canada, South Korea, European countries and a number of others) started the conflict holding ~1.2B barrels in strategic reserves, plus ~600M barrels of industry stocks held under government obligation. On March 11th they announced the largest coordinated emergency drawdown since the organisation was founded in 1974, releasing 400M barrels (one third of government holdings). This happened as Brent spiked to over $115 per barrel, with intraday peaks significantly higher, before settling back into the $95-110 range.
The US Strategic Petroleum Reserve (SPR) entered the conflict at ~411M barrels, down from 700M+ at its peak before years of politically motivated drawdowns (such as suppressing oil prices when war has broken out or to fund government spending). The Trump administration has since loaned a further 53.3M barrels to energy companies. API CEO Mike Sommers, speaking on CNN on June 8th, confirmed the SPR now holds ~350M barrels. With ~20% of capacity required to keep the reserve operationally functional, the effective floor sits at ~70M barrels, leaving 280M barrels of buffer. Gasoline inventories have already drawn down 38M barrels, almost equal to an entire summer driving season's worth of stock, before summer demand has even peaked. Sommers was clear, domestic production increases in the Permian Basin and Alaska cannot substitute for reopening the Strait.
To put the IEA's position in to context, 32 countries hold 1.2B barrels in government reserves. China alone had 1.4B barrels in reserves when the conflict broke out, they have spent years quietly building one of the largest strategic stockpiles on earth whilst the US and Europe were drawing down on theirs for political convenience. China has since relied on that inventory rather than overseas supply, pulling back aggressively on imports since the conflict began.
How Long Can They Hold?
The Strait carried 20M barrels per day before the conflict, even at maximum drawdown rate of 4.4M barrels per day the US SPR cannot offset that disruption alone, and actual delivery takes weeks after a drawdown is authorised. The IEA's 400M barrel release addresses just 20 days of the Strait's normal throughput.
After that release, IEA member countries retain roughly 800M barrels of government reserves, at a sustained drawdown rate the buffer covers ~40 days of normal Hormuz throughput.
The EIA's May 2026 Short-Term Energy Outlook estimates global oil inventories are falling at an average of 8.5M barrels per day in Q2 2026. At that rate, the IEA's remaining 800M barrel government reserve buffer lasts ~94 days at current depletion rates, assuming governments are willing to drain to the operational floor. The IEA's maximum release rate of 4.4M barrels per day replaces just 22% of the 20M barrels per day that normally pass through the Strait. The report also confirmed cumulative supply losses from Gulf producers already exceed 1B barrels with more than 14M barrels per day currently trapped.
Additionally, the UAE departed OPEC effective May 1st 2026. Because the UAE held significant spare production capacity, OPEC's available spare capacity for 2027 has dropped from 3.8M to 2.5M barrels per day. This reduces the buffer the market assumed would be available to accelerate the recovery.
Current Demand Destruction
High prices are doing what high prices always do, cut demand. The IEA's May 2026 Oil Market Report forecasts global oil demand to contract by 420K barrels per day for FY 2026. In Q2 2026 alone the contraction is 2.4M barrels per day, the sharpest quarterly demand decline since Covid-19 cut global consumption back in 2020.
Before the conflict the IEA forecasted demand would grow by 850K barrels per day in 2026. The swing from pre-war forecast to today is 1.3M barrels per day, ~475M barrels over the full year.
The sharpest cuts have come from petrochemicals and Middle Eastern/Asian flight routes, both highly price-sensitive and with few short-term substitutes. As the conflict drags on the IEA warns demand destruction will spread into road transport and industrial use across all regions.
That said, falling demand does not reduce the reserve depletion problem. Governments are releasing strategic reserves specifically to hold prices below the level at which demand destruction becomes severe. If they were to stop releasing reserves, prices will spike and demand contracts further. If they continue releasing reserves, the buffer shrinks. There is no middle ground in which prices stay manageable whilst the reserves stay intact, the reserve is being consumed to buy time and that time is finite.
The Replenishment Bill
Governments that released reserves at $90-115 per barrel will need to buy them back at whatever price prevails when replenishment begins. The US Department of Energy has acknowledged that SPR refills won't begin until November 2026 at the earliest.
The SPR currently sits at approximately 350M barrels against a capacity of 714M barrels. The 53.3M barrels lent to energy companies during the conflict will be returned through exchange agreements, covering roughly 15% of the gap. The remaining 310M barrels need to be purchased on the open market. At $95 per barrel that costs approximately $29.5B, at $115 it costs $35.7B.
The IEA's coordinated 400M barrel emergency release was sold directly into the market to suppress prices, which also needs to be repurchased too. The proceeds from those sales went into general government revenues, not a ring-fenced IEA rebuild fund. Replenishment requires new budgets, a politically difficult ask when governments are simultaneously managing deficits, slowing economies, elevated interest rates and sticky inflation.
The US SPR's maximum injection rate is approximately 700K barrels per day, even after the exchange returns reduce the gap to 310M barrels, purchasing and injecting the remainder will take over 440 days.
When the Strait reopens every government will be trying to rebuild reserves at the same time, creating a demand floor on the price of oil that could last for years.
What Happens If This Lasts Until December
The IMF's April 2026 World Economic Outlook modelled three scenarios:
Short-lived conflict with oil normalising to $82 per barrel: global GDP grows 3.1% in 2026.
Prolonged conflict with oil averaging $100 per barrel through year end: global GDP growth falls to 2.5%.
Deepening hostilities with infrastructure damage: global GDP growth falls to 2.0%, the edge of a global recession.
The regional picture looks even worse, Vanguard's analysis found that oil at $125 per barrel sustained through year end would trim one full percentage point from euro area real GDP and push Europe into recession. The ECB has already revised its 2026 GDP forecast down to 0.9% and is expected to hike rates to 2.25% on June 11th. Separately, Allianz models the Eurozone at 0.2% annual growth under a prolonged Hormuz closure scenario with inflation peaking at 4.6%.
Goldman Sachs raised its US recession probability to 30% directly in response to the oil price surge from the Strait disruptions, up from 20% before the conflict began. JPMorgan sits at 35%, with its economists explicitly pushing back against optimistic readings and arguing the Iran conflict is not merely an inflation speed bump. EY-Parthenon puts the odds at 40%. The EIA's base case assumes Brent falls to an average of $89 per barrel by Q4 2026 as Hormuz traffic gradually resumes, but that assumes a diplomatic resolution which has not yet materialised.
Japan imports nearly all of its oil and is the most acutely exposed major developed economy, with India, South Korea, and Taiwan facing the same challenges.
China, with 1.4B barrels in reserve and domestic production supplementing imports through alternative routes, is the major economy best positioned to absorb a prolonged closure.
Winners and Losers
The Winners
$XOM (Exxon Mobil) and $CVX (Chevron): US domestic producers are the clearest beneficiaries, with every barrel produced commanding a global price set by the disruption while carrying none of the Strait supply risk. Both have the balance sheets and production capacity to deploy capital quickly into elevated price environments.
$COP (ConocoPhillips): same thesis as Exxon and Chevron, more production-weighted and less refining exposure.
$PSX (Phillips 66) and $MPC (Marathon Petroleum): US refiners benefit as the price differential between domestic crude and globally traded refined products widens, disruption to Middle Eastern refining capacity reduces competition for refined product margins.
$SLB and $HAL (Halliburton): oilfield service companies that benefit from the capital expenditure surge that elevated prices trigger, with every oil producer globally is reassessing drilling programmes.
$LNG (Cheniere Energy): European and Asian buyers are substituting disrupted Middle Eastern pipeline gas with LNG, with the LNG terminals Europe has built since 2022 now running at full capacity.
The Losers
Airlines ($DAL, $UAL, $AAL): Although all three are up YTD despite the oil price surge, passing costs through to customers while demand has held up. The demand destruction the IEA is already seeing in Middle Eastern and Asian flight routes has not yet reached US carriers. American has zero fuel hedging contracts outstanding per its Q1 2026 10-Q, leaving it fully exposed to every cent of oil price movement. If oil stays elevated through year end and the demand destruction spreads into US domestic travel, the re-pricing arrives quickly for airlines carrying $4B+ in additional annual fuel costs with no hedging protection.
Consumer discretionary ($FDX, $UPS, $HD, $TGT): higher energy costs act as a consumer tax on discretionary spending, logistics costs rise with diesel prices and margins compress at both ends simultaneously.
European industrials ($BASFY, $TKAMY): the DAX has significant industrial weighting and European energy costs are structurally higher than the US, energy-intensive manufacturers face a cost structure that makes elevated oil prices genuinely damaging to profitability.
Japanese equities broadly ($EWJ): Japan has no real domestic oil production and the yen faces depreciation pressure as the trade balance deteriorates, which feeds imported inflation and constrains the Bank of Japan's already complicated policy position.
Emerging market oil importers: countries like India, South Korea, and Taiwan that import the majority of their oil face simultaneous currency pressure and energy cost inflation. Both compress domestic consumer spending and corporate margins at the same time, these are macro headwinds for those economies rather than specific tickers.
My View
The reserves buffer is a short-term bridge, not a long-term solution. The IEA's 90-day import cover requirement was designed for temporary supply shocks, not sustained major shipping lane closures.
As of today Brent is trading at ~$91 per barrel, down from over $115 with intraday peaks significantly higher. Trump said last night a deal could be reached in two-three days and that the Strait would reopen immediately after. The ceasefire technically remains intact but the Strait is still closed under a dual US-Iran blockade. Markets have now heard variations of this announcement multiple times since February, each time Brent falls on the optimism and recovers when the deal doesn't materialise. The structural supply disruption continues regardless of the diplomatic noise.
The ECB is hiking into a slowing economy on Thursday and the Fed faces the same bind, it is a supply-side problem the wrong tools cannot fix.
Even if a deal is reached this week, the supply recovery will not be instant. Commodity Context analyst Rory Johnston notes any Strait reopening would trigger an immediate $10-20 drop in crude from speculative positioning unwinding, but that relief would be short-lived. Infrastructure damage, supply chain bottlenecks, and production outages that built up over months do not clear overnight. His estimate is Brent anchors in the $80-90 range after reopening rather than returning to pre-war levels near $70. The market is pricing in a full recovery, but the physical infrastructure does not recover as fast as a futures contract reprices.
The daily coverage focuses on ceasefire odds and Brent's price moves, but the more important story is the structural one. Reserves that took decades to build are being consumed in months, the bill to replace them is growing every week and when the Strait eventually does reopen, every government on earth will be competing to buy from the same market at the same time. That is the floor under oil prices that outlasts the conflict.
Ticker Thoughts is independent analysis. No positions held in the tickers mentioned at time of publication.