Oil prices fell sharply on Monday, with crude sliding about 5% after the United States and Iran paused strikes over the weekend. The move came after roughly two weeks of attacks and signaled to traders that the immediate risk of further escalation may have eased.

The decline reflected a fast shift in market sentiment. When fighting appears to slow, concerns about a broader regional conflict and possible disruption to energy flows typically ease as well. That helped push prices lower at the start of the week.

Investors also appeared to focus on the possibility of a diplomatic solution. Hopes that the pause could open space for talks reduced some of the geopolitical premium that had built up in oil during the recent tensions.

Even so, the market remains sensitive to developments involving the U.S. and Iran. Any sign that the pause is breaking down, or that tensions are rising again, could quickly change the direction of crude prices.