Oil prices fell sharply on Monday after the United States unexpectedly suspended its air campaign against Iran, a move that revived expectations of a possible easing in the conflict. The sell-off pushed crude to its lowest level in more than a week, with Brent dropping below $90 a barrel.

The market reaction reflected how quickly geopolitical risk can be priced into energy markets and then unwind when tensions appear to cool. A pause in military action reduced immediate fears of wider disruption, leading traders to pull back from earlier positions that had been driven by concern over the crisis.

Brent’s decline of more than 8% underscored the speed of the shift in sentiment. Oil had been supported by worries that any escalation involving Iran could threaten regional stability and affect supply expectations, but hopes for de-escalation changed the near-term outlook.

Even with the sharp drop, the broader direction of oil prices is still likely to depend on developments around the US-Iran situation. Markets will continue to watch for signs of renewed conflict or further restraint, as either path could quickly reshape pricing across the energy sector.