Why are oil prices crashing down today, and will Brent and US WTI crude futures continue to decline or move upwards again? Oil prices dropped nearly 7% after reports suggested the United States and Iran were moving closer to a deal linked to the Strait of Hormuz. Brent crude and US WTI futures declined as traders reacted to hopes of improved oil supply. Analysts said uncertainty still remains because negotiations are not final and oil flows through the region continue to face restrictions.