Oil Prices Fall as Record US Inventory Build Offsets Iran Supply Risks

Key Takeaways:

• US crude inventories surged by 17.4 million barrels, the largest weekly increase in around three and a half years.

• The massive inventory build raised concerns over weaker near-term oil demand and softer export activity.

• US–Iran negotiations remain deadlocked, keeping supply risks around the Strait of Hormuz elevated.

• Deteriorating shipping conditions are making actual energy flows through the region increasingly difficult to assess.

• Oil remains caught between bearish demand signals and persistent geopolitical supply risks.

Market Summary:

Crude oil prices edged lower as a surprisingly large increase in US inventories outweighed ongoing concerns over supply disruptions in the Middle East.

According to the Energy Information Administration, US crude inventories jumped by 17.4 million barrels in the latest week, compared with market expectations for a decline. The increase was the largest since January 2023 and was driven partly by weaker crude exports and higher imports, reinforcing concerns over near-term demand conditions.

The broader demand outlook has also become more cautious. Both OPEC and the International Energy Agency recently lowered their 2026 oil-demand forecasts, adding further pressure to crude prices.

However, the downside remains limited by continued uncertainty surrounding the US–Iran conflict and the Strait of Hormuz. A senior Iranian source said there had been no progress in efforts to revive the interim agreement reached in June, leaving negotiations over shipping access unresolved.

Shipping conditions have also deteriorated, with some vessels reportedly switching off tracking signals because of security concerns. This reduces transparency over actual supply flows and makes it more difficult for traders to assess how much crude is moving through the region.

For now, crude oil remains caught between bearish inventory and demand signals and bullish geopolitical supply risks. Further developments in US–Iran negotiations and shipping activity through the Strait of Hormuz are likely to remain the key catalysts for oil prices.