US stocks rally as oil drops 4% on Middle East de-escalation hopes

US equities surged on Monday, with the Nasdaq up 2.12%, as oil prices fell about 4% on diplomatic efforts to end the Middle East conflict. Trump's comment that war with Iran is 'very unlikely' if negotiations progress reinforces the risk-on sentiment. The market's positive reaction to oil easing underscores the direct link between geopolitical risk and equity performance.

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