Oil Prices Decline as Strait of Hormuz Reopens

Global energy markets experienced significant relief following the interim agreement between the United States and Iran, which mandates the reopening of the Strait of Hormuz to international shipping traffic. The memorandum of understanding, reached on June 18, 2026, alleviated fears of supply disruptions caused by months of conflict, leading to sharp declines in oil prices. With the signing of the deal, tensions over the critical waterway, through which one-fifth of the world's oil trade passes, have subsided, and markets are now anticipating an increase in global supply.

The 14-point memorandum of understanding between the U.S. and Iran aims to end the conflict, immediately reopen the Strait of Hormuz, and initiate broader direct negotiations on contentious issues such as Tehran's nuclear program. Under the agreement, Iran is expected to allow vessel transits through the Strait of Hormuz, with the goal of restoring full traffic capacity within 30 days. U.S. Central Command (CENTCOM) announced the lifting of the U.S. blockade on ships traveling to and from Iranian ports and coastal areas. Furthermore, the easing of sanctions on Iranian crude is also being considered as part of the negotiations. However, Iran has stated its intention to resume charging 'service fees' for passage through the strait after the 60-day negotiation period, a stance that conflicts with the U.S. expectation of 'toll-free' transit.

These positive developments immediately impacted global oil prices. Brent crude futures dropped below $79 per barrel, marking their lowest levels since early March. Brent crude, which was trading around $118 in April at the peak of the conflict, experienced a sharp decline following the agreement news. U.S. West Texas Intermediate (WTI) also saw significant losses. In parallel with falling oil prices, global stock markets rallied, with the Dow Jones Industrial Average reaching record highs as investors priced in optimism for global economic stability. Wholesale natural gas prices in Europe also decreased.

The Strait of Hormuz is a strategic choke point through which approximately 20-25% of the world's oil and natural gas passes. The conflict, which lasted over 100 days since February 2026, had caused major disruptions in global energy supply chains and contributed to high oil prices. The U.S. Energy Information Administration (EIA) had previously assumed the strait would remain effectively closed in the near term, with normal shipping resuming in Q3 2026 and reaching full capacity by early 2027. The International Energy Agency (IEA) had also revised down its 2026 global oil demand outlook, forecasting a decrease of 1.1 million barrels per day due to the conflict. High oil prices had incentivized some producers outside the Middle East, such as Brazil, Kazakhstan, and Venezuela, to increase their output.

Market analysts caution that a full return to pre-crisis normality for the Strait of Hormuz will take time. Logistical challenges, mine clearance operations, and uncertainties regarding sustained transit safety mean that reaching full capacity could take weeks or even months. Economists at Capital Economics estimate that energy flows could reach 80% of pre-war levels by September. Goldman Sachs has cut its Brent crude forecast to $80 per barrel for Q4 2026, expecting Persian Gulf crude exports to return to pre-war levels by the end of July. Bank of America forecasts Brent crude to average $82 per barrel this year, down from $93, and trade in the $70-$80 range for the second half of 2026. Experts note that the market is pricing in a faster return of Iranian oil, but also suggest that the decline may be limited due to the need to replenish global inventories and ongoing supply uncertainties.

While some institutional investors are positioning for oil prices to fall rapidly to $50-$60 per barrel if the conflict is fully resolved, the International Energy Agency anticipates a supply surplus of 8 million barrels per day in 2027, assuming normal shipping traffic is restored. This indicates that the search for a new equilibrium in energy markets will continue.