• U.S. stock futures reversed gains after President Trump's remarks on Iran, escalating geopolitical tensions.
  • Oil prices surged as investors priced in potential supply disruptions from the Middle East.
  • Risk-off sentiment swept through markets, with Treasury yields falling and the VIX spiking.

Markets on Edge

S&P 500 and Nasdaq futures turned negative late Thursday after President Trump made hawkish comments regarding Iran, stoking fears of a broader conflict in the Middle East. According to people familiar with the matter, Trump's remarks caught many traders off guard, as earlier in the session futures had been trading higher on optimism about a potential trade deal with China.

"The market was not positioned for this kind of rhetoric," a senior equity trader at a major New York bank said, asking not to be identified because they were not authorized to speak publicly. "It's a sudden shift in risk appetite."

Oil prices jumped more than 3% on the news, with Brent crude topping $72 a barrel, as investors feared disruptions to global supplies from the region. The yield on the 10-year Treasury note fell 5 basis points to 1.82%, while the Cboe Volatility Index, or VIX, rose above 18, indicating heightened anxiety.

Geopolitical Risk Resurfaces

Trump's comments come amid ongoing tensions over Iran's nuclear program and its support for militant groups in the region. The president did not specify any new actions but reiterated his administration's hardline stance. "We have a lot of options," he said, according to a pool report from the White House. "We'll see what happens."

The shift in sentiment underscores how sensitive markets remain to geopolitical headlines, especially those involving the Middle East. In recent months, traders have largely shrugged off such risks, focusing instead on central bank policy and corporate earnings. Thursday's action suggests that calm may be brittle.

Analysts at a major Wall Street firm noted parallels to previous flare-ups in 2019 and early 2020, when Trump's threats against Iran led to sharp but temporary selloffs. "Unless there is a clear escalation, we expect this to be a short-term blip," one strategist said, though they cautioned that oil's rise could weigh on equities longer if sustained.

Energy and defense stocks saw modest gains in after-hours trading, while technology shares slipped. Investors are now watching for any official statements from the Pentagon or the State Department that could clarify the administration's next steps. Attempts to reach the White House for additional comment were not immediately successful.

Correction: A previous version of this article misstated the time of the futures decline. The move occurred after Trump's remarks, not before.