U.S. stock markets experienced a mixed performance, with the Dow Jones Industrial Average and S&P 500 declining while the Nasdaq Composite eked out gains. The shifts followed President Trump's statement that the ceasefire with Iran was over, signaling potential for continued hostilities near the Strait of Hormuz.

The Dow Jones Industrial Average lost 1.09%, or 576.76 points, closing at 52348.39, and the S&P 500 fell 0.28%, or 21.14 points, to 7482.71. The Nasdaq Composite, however, rose 0.2%, adding 51.96 points to reach 25870.65, driven by a recovery in semiconductor stocks.

U.S. oil futures surged 4.4%, or $3.08, to $73.52 a barrel, after spiking as much as 8% during trading. This rise reflects renewed concerns over the strategic Strait of Hormuz, following Iranian attacks on ships. Oil refiner Phillips 66 saw its stock jump 5%, or $8.97, to $187.81, nearing all-time highs. Elevated gasoline prices, averaging $3.80 per gallon nationally, persist despite recent drops in crude oil.

The geopolitical developments inject uncertainty into energy markets, potentially impacting inflation and consumer spending. Investors are now weighing the risk of escalating conflict against the economic implications of disrupted oil supply routes.