USO Surges 5% After-Hours as Iran Conflict Escalates and Strait of Hormuz Closes

Geopolitical Shock Triggers After-Hours Rally

Energy markets entered a state of high alert during Wednesday's after-hours session, with the United States Oil Fund (USO) climbing 5.26% on massive volume of 80.9 million shares. The move was catalyzed by a rapid deterioration of security in the Persian Gulf, where Iranian forces reportedly targeted commercial vessels and Dubai International Airport. The most significant driver for the after-hours spike was the confirmed closure of the Strait of Hormuz, which has historically served as the transit point for nearly 21 million barrels of oil per day.

Traders in the extended session reacted to breaking reports that the U.S. military engaged and destroyed 16 Iranian minelayer vessels near the Strait. This direct confrontation has injected a massive risk premium into crude prices, with West Texas Intermediate (WTI) futures pushing toward the $108 per barrel mark. The move represents a continuation of a volatile trend; USO has now surged more than 30% since the regional conflict began on February 28, 2026.

IEA Intervention Fails to Cool Prices

In a historic but ultimately ineffective move to stabilize markets, the International Energy Agency (IEA) announced the largest emergency oil reserve release in its 50-year history. The agency's 32 member countries unanimously agreed to release 400 million barrels from strategic stockpiles. Despite the unprecedented scale of this intervention—more than double the release seen during the 2022 energy crisis—market participants in after-hours trading appeared to view the supply disruption from the Hormuz closure as a far greater threat than the relief provided by the reserves.

Analysts noted that while a 400-million-barrel release is significant, it cannot easily bypass the physical logistical hurdles created by a closed Strait of Hormuz. "The market is pricing in a total blockade scenario," noted one energy strategist. "In that context, strategic reserves are a temporary band-aid on a severed artery."

Inventory Data and Inflationary Pressures

Adding fundamental support to the geopolitical rally, the American Petroleum Institute (API) released its weekly report after the close, showing a surprise crude inventory draw of 1.7 million barrels for the week ending March 6. This contrasted sharply with analyst expectations of a 1.4 million barrel build. The tightening of domestic stocks, combined with a 4% year-over-year increase in U.S. jet fuel demand, suggests that the oil market was already fundamentally tight before the latest military escalation.

This energy shock arrives at a delicate time for the Federal Reserve. While the February Consumer Price Index (CPI) released earlier today matched expectations at 2.4%, that data does not account for the current $20-per-barrel spike in crude. Economists warn that if oil remains above $100, headline inflation could quickly accelerate toward 3.2%, potentially forcing the Fed to abandon its planned "insurance" rate cuts and maintain a hawkish stance to combat energy-driven price pressures.