March 17, 2026

The S&P 500 rose on Tuesday as Wall Street built on the momentum seen in the previous session amid developments in the Iran war.

The broad market index rose 0.6%, as did the Nasdaq Composite. The Dow Jones Industrial Average added 330 points, or 0.7%.

Volatile oil prices and the fallout of the Iran war continue to influence investor sentiment. On Tuesday morning, oil prices advanced more than 1%, with global benchmark Brent crude above the $100 mark.

Oil’s bounce came after President Donald Trump suggested that a coalition to protect shipping along the Strait of Hormuz is still in the works.

The S&P 500 climbed 0.6% on Tuesday, riding the wave of momentum from the previous day amid ongoing tensions from the Iran conflict, with the Dow rising 330 points and the Nasdaq also up 0.6%. Investor sentiment was shaped by rising oil prices, as Brent crude surged above $100 following President Trump's remarks about forming a coalition to safeguard shipping through the Strait of Hormuz, despite some countries' reluctance to join. Trump emphasized that while several nations are eager to participate, a few longtime U.S. allies are hesitant or unwilling to contribute, raising questions about the coalition's future and maintaining market attention on geopolitical risks.

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