S&P 500 Wobbles as Trump Declares Iran Deal ‘Over’

Investor confidence faltered after President Trump’s abrupt declaration that the interim Iran ceasefire has collapsed, sending shockwaves through equity markets and oil prices alike.

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A Sudden Shock: Trump Declares Ceasefire ‘Over’

On July 8, 2026, speaking at the NATO summit in Ankara, President Trump bluntly declared the interim memorandum of understanding with Iran “over,” labeling Iranian leaders “scum” and expressing no desire to continue talks. He also warned of possible new strikes, though he later downplayed the likelihood of a full-scale war. This abrupt shift came just three weeks after the ceasefire was brokered to allow 60 days of negotiations.

Markets React: Equities Slide, Oil Surges

Markets responded swiftly. At midday ET, the S&P 500 had dropped approximately 0.89% to 7,437.21, while the Dow fell 1.46%, and the Nasdaq declined 0.91%. By close, the S&P 500 ended lower, dragged by geopolitical uncertainty, although gains in chip stocks like Broadcom provided a partial cushion. Oil prices rallied sharply—Brent crude rose over 5%, briefly topping $80 a barrel, while WTI climbed over 6%.