Impacts of the US-Iran Conflict on Global Oil Supply and Investor Outlook

By Patricia Miller

Jun 17, 2026

2 min read

The US and Iran are set to sign a 60-day peace deal, impacting global oil supply forecasts and investor expectations.

After nearly four months of intense military conflict, the United States and Iran are expected to finalize a 60-day interim peace agreement this Friday in Switzerland. This conflict has significantly impacted global energy supply, and data reveals a dire situation. The International Energy Agency forecasts that by 2026, the global oil supply will experience a drop of about 3.9 million barrels per day on average. This deficit is substantial enough to surpass demand expectations, with lingering effects affecting at least the third quarter of the year.

In response to the peace deal announcement, markets reacted positively. Brent crude prices fell approximately 4% to around $84 per barrel, a sharp decrease from nearly $120 at the height of the crisis. This represents a considerable price swing of around $36 per barrel in just a few months.

#How Did the War Change the Global Oil Supply?

The conflict began on February 28, 2026, following joint airstrikes by the US and Israel targeting Iran, which led to widespread supply disruptions across the Persian Gulf. A critical consequence of these actions was the closure of the Strait of Hormuz, a key waterway that facilitates the transport of about 20% of the world’s oil.

The production decrease primarily affected Gulf nations involved in the conflict. The IEA's projections demonstrate the severity of the situation, predicting an average supply shortfall of 3.9 million barrels per day for the entire year. The Oil Market Report released in May 2026 highlights these conflict-induced trends, indicating that significant supply deficits will likely persist through at least the third quarter of 2026.

#What Are the Key Components of the Peace Deal?

The framework for this interim agreement was announced around June 14-15, 2026, with the formal signing planned for June 19 in Switzerland. The primary aim of this 60-day deal is to cease hostilities and allow for the resumption of oil transit through the Strait of Hormuz. It is crucial to note that this window is a confidence-building measure and not intended to serve as a permanent resolution.

Industry experts are looking ahead to the IEA’s upcoming Oil Market Report, which is expected to incorporate these developments and project potential shifts in oil supply and pricing after the deal’s implementation.

#What Are the Implications for Investors?

The recent decrease in Brent crude to around $84 per barrel reflects the market's initial response to the easing of tensions. While this price remains significantly higher than pre-conflict levels, it does not eliminate the uncertainties surrounding Iran’s nuclear activities and the broader geopolitical challenges that instigated the February strikes.

Attention should be focused on the IEA's June Oil Market Report. A signal indicating a potential narrowing of supply shortfalls in the latter half of 2026 could lead to further declines in crude oil prices. The difference between the current $84 price and the $120 peak illustrates a significant economic impact that could span into various sectors globally.

Important Notice And Disclaimer

This article does not provide any financial advice and is not a recommendation to deal in any securities or product. Investments may fall in value and an investor may lose some or all of their investment. Past performance is not an indicator of future performance.