U.S. oil reserves hit 43-year low as twin chokepoint crisis deepens

The U.S. Strategic Petroleum Reserve has fallen to 319.5 million barrels, its lowest since August 1983, as the closure of the Strait of Hormuz and a new Houthi blockade on Saudi Red Sea oil threaten to cut roughly 25% of global supply.

"Crude oil is fast losing its strategic petroleum reserve buffer, and a violent repricing up cannot be discounted until the market sees toned-down rhetoric from both parties," June Goh, an analyst at Sparta Commodities, said.

The SPR has drained 66 million barrels since the Iran conflict began in late February, including a record 9.92 million barrels in a single week in May. WTI crude briefly touched $114.58 per barrel in April before a short-lived June ceasefire pushed prices back toward $70. After the ceasefire collapsed in July, WTI has climbed back to around $85, a gain of more than 20% from the June low. The Energy Select Sector SPDR Fund has gained 30.77% year to date, with Exxon Mobil up 24.1% and Chevron up 25.28%.

The reserve was created after the 1973 Arab oil embargo and peaked at 726.6 million barrels in December 2009. At current levels, the U.S. holds less than a quarter of China's 1.4 billion barrel stockpile. With the Strait of Hormuz closed and the Houthis now blocking Saudi shipments through the Bab el-Mandeb, the world has lost two of its most critical oil transit routes simultaneously — a scenario analysts had warned about but never expected to materialize.

A Two-Front Supply Crisis

The Strait of Hormuz closure alone erased roughly 15 million barrels per day from global markets when Iran shut the waterway in late February. Before the conflict, almost 20% of the world's traded oil passed through the narrow channel between the Persian Gulf and the Gulf of Oman. The International Energy Agency responded with a coordinated release of 400 million barrels from more than 30 countries, while the U.S. ramped up domestic production and Asian importers imposed conservation measures including four-day work weeks and driving restrictions.

Those measures bought time, but they are running out. The IEA release is largely exhausted, and the U.S. SPR has fallen so low that structural integrity is becoming a concern, according to analysts cited by the Washington Post. China, which stopped buying crude for its own reserves during the crisis, has resumed purchases, removing a critical demand-side buffer that had freed up roughly 5 million barrels per day for the world market.

The Bab el-Mandeb Factor

On July 20, Yemen's Houthi rebels announced a maritime embargo on Saudi oil shipments passing through the Bab el-Mandeb Strait, the narrow waterway between Yemen and Djibouti. Saudi Arabia had diverted roughly 4.5 million barrels per day through pipelines to its Yanbu port on the Red Sea to bypass the Hormuz closure. The Houthi blockade now threatens to cut off that alternative route as well.

A full closure of the Bab el-Mandeb would cut global oil supply by an additional 7%, according to Reuters, on top of the roughly 10% reduction already caused by the Hormuz closure. The Houthis previously waged a shipping campaign from November 2023 through September 2025 that forced vessels to avoid the Suez Canal, adding nearly $200 billion in shipping costs. The U.S. and its allies expended significant air defense and strike munitions during that campaign, and the Pentagon has warned that stockpiles are dwindling.

What $100 Oil Would Mean

TD Securities has said $100 per barrel is plausible if physical shortages become visible. Eurasia Group sees oil rising toward $95. UBS has warned of a crude "danger zone" as SPR buffers disappear. Patrick De Haan, head of petroleum analysis at GasBuddy, called the SPR drawdown "a pretty monumental number" and warned that "the longer this goes on the fewer tools the administration has."

For U.S. consumers, the risk is asymmetric. Gasoline prices have stayed at $3.85 per gallon as of July 13, contained partly by SPR releases. But with the reserve approaching structural limits and both chokepoints closed, the cushion that kept pump prices stable through the first half of 2026 is disappearing. The next supply shock, if it comes, will arrive without a safety net.

This article is for informational purposes only and does not constitute investment advice.