The price of oil has fallen sharply after the United States and Iran paused attacks, raising hopes that the conflict between the two countries may calm down.
Brent crude oil, which is used as a global price guide, fell by more than 9% after rising above $100 per barrel last week.
The drop happened after both countries announced that attacks had stopped temporarily to allow possible talks.
The conflict had caused oil prices to rise because of fears that oil supplies could be affected, especially through the Strait of Hormuz, an important route for transporting oil around the world.
Oil prices had earlier fallen after efforts to reduce the conflict, but they increased again when fighting restarted, and concerns about energy supplies grew.
By Monday, oil prices were still lower, but experts warned that the situation remains uncertain because the conflict could change at any time.
Analysts said countries are watching the situation closely because continued tensions could affect fuel prices and global energy supplies.