Markets react to pause in military action
U.S. stocks climbed sharply Monday after President Donald Trump announced a five-day postponement of planned military strikes on Iranian power plants. The move followed what Trump described as “very good and productive conversations” between the United States and Iran aimed at resolving hostilities in the Middle East.
Details about the timing and substance of those conversations shifted throughout the day, with differing accounts from U.S. and Iranian sources. For investors, however, the possibility of de-escalation was enough to spark a broad rally, particularly as energy markets have been strained by weeks of conflict.
Major indexes post strongest gains in weeks
Futures for the S&P 500 and Nasdaq 100 jumped roughly 3% shortly after Trump’s morning statement. While gains moderated by the close, the rally remained significant. The S&P 500 ended the day up 1.1%, and the Nasdaq Composite rose 1.4%. The Dow Jones Industrial Average gained 631 points, while the small-cap Russell 2000 advanced 2.7%.
All sectors of the S&P 500 finished higher, marking the strongest day for the major indexes since early February.
Oil prices plunge on easing fears
Energy markets saw dramatic swings. U.S. crude oil fell around 11%, settling at $88.13 per barrel. Brent crude dropped to $99.94 per barrel, slipping below $100 for the first time since March 11.
Despite the decline, oil remains elevated overall, up more than 30% since the conflict began on Feb. 28 and over 50% year to date. Natural gas prices in the United States fell 6%, while European gas futures dropped 9%. Heating oil futures declined 12%, reflecting broader expectations of easing supply pressure.
Strait of Hormuz remains focal point
The conflict has centered in part on the Strait of Hormuz, a critical route for global oil shipments. Trump suggested the waterway could reopen soon but provided limited details. Analysts cautioned that even if fighting stops quickly, reopening the strait could take months due to infrastructure damage and logistical challenges.
Iranian state media characterized Trump’s announcement as a retreat, while Trump maintained that Tehran had initiated diplomatic outreach. The president previously issued a 48-hour ultimatum demanding the strait be reopened, with that deadline set to expire Monday night.
Bond markets reflect shifting risk outlook
U.S. Treasury prices rose following the announcement, pushing yields lower after recent increases driven by inflation concerns linked to higher energy costs. Yields edged down modestly later in the morning as conflicting reports introduced renewed uncertainty.
Market strategists noted that volatility has been fueled by inconsistent messaging. As UBS economist Paul Donovan observed before the rally, investors face difficulty pricing geopolitical risk when official statements offer differing assessments and measurable objectives remain unclear.
For now, the pause in military action has provided temporary relief to equities and energy markets. Whether that relief proves lasting will depend on the trajectory of diplomatic efforts in the days ahead.

