IMF warns oil market buffers are nearly exhausted amid U.S.-Iran escalation

Renewed U.S. military strikes against Iran and the reimposition of a naval blockade on Iranian ports have sent oil prices climbing again this week, as the International Monetary Fund warned that the cushions that shielded the global economy from the worst of the energy shock have been largely exhausted.

Escalation Unravels Fragile Peace Framework

The latest round of hostilities began July 12 when U.S. Central Command launched strikes to "degrade Iranian capabilities used to attack commercial shipping in the Strait of Hormuz." President Trump reimposed a full naval blockade on all Iranian ports effective July 14, after having lifted it in June as part of an interim peace agreement. Iran responded by striking U.S. military bases across Kuwait, Bahrain, Jordan, Oman, and Qatar, and declared the strait closed to commercial traffic.usatoday+3

Brent crude rose to roughly $85 per barrel by midweek, after surging 9.6% on Monday alone — the largest single-day percentage gain for the international benchmark since May 2020. U.S. refining margins have simultaneously hit record territory, with the NYMEX 3-2-1 crack spread reaching an all-time high above $64 per barrel on July 8, according to Reuters data cited by industry trackers, as fuel inventories sit at multi-year lows.wsj+2

IMF: More Than a Billion Barrels Lost

In a blog post published July 15, the IMF said that by the end of May, more than 1.1 billion barrels of crude — equivalent to roughly 10 days of typical global consumption — had failed to reach markets since the war began. The fund noted that the three shock absorbers that cushioned the initial blow — a pre-war supply surplus, coordinated inventory releases, and reduced demand — have now been largely depleted.imf

"As tensions flare again in the Strait of Hormuz, that room is now smaller and shrinking further as spare capacity has been deployed, demand has compressed, and inventories have been drawn down," the IMF wrote. Reuters Thomson Reuters Corporation ↗ 2.92% reported separately that the world "still faces the looming risk of future price spikes" with long-term peace elusive and buffer reserves drained.reuters+1

Markets Eye the Fed

The energy price shock has complicated the Federal Reserve's policy outlook. The Fed has held rates at 3.50%–3.75% since December 2025, and CME FedWatch data as of July 15 showed an 83.4% probability the central bank will stand pat at its July 29 meeting. But markets are increasingly pricing the risk of tightening later this year — CME data from early July showed rate hike probability for 2026 climbing, and prediction market Polymarket shows "25 bps increase" carrying a 30% probability for the September meeting.polymarket+1

The IMF's latest World Economic Outlook update, issued July 8, projects global growth of just 3% in 2026, down from 3.5% last year, with oil prices expected to rise nearly 32% for the full year and global consumer inflation averaging 4.7%.apnews