President Donald Trump called off a planned massive attack on Iran late Saturday, opting instead to pursue diplomatic talks set for Monday, according to reports confirmed across multiple outlets including Reuters, AP News, and The Guardian. Trump said the U.S. and Iran would resume negotiations, signaling a shift from military escalation toward negotiated settlement.
The decision to halt the strike came after months of escalating tensions. A ceasefire agreement between the U.S. and Iran had collapsed in early July after Iran conducted a surprise missile attack on U.S. forces in the Middle East, prompting Trump to threaten retaliation. According to Al Jazeera and CNN, Trump had pledged a major military response, with the planned attack targeting Iran’s energy infrastructure.
The cancellation sent immediate ripples through financial markets. Oil prices fell sharply, dropping more than $5 per barrel on Monday as investors welcomed the easing of military tensions, according to Energy News and CNBC. Stock markets surged in response: the S&P 500 gained 1.48% to close at 7,600.61 points, while the Dow Jones Industrial Average hit a record high, rising 1.3%, according to Reuters and the Detroit News. The Nasdaq climbed 2.1%, marking a strong market open for August.
The core dispute centers on the Strait of Hormuz, a critical waterway through which roughly 20 percent of global oil passes, according to the YIP Institute. Iran has sought guarantees that the U.S. will lift its naval blockade and reopen the strait to international shipping. Multiple rounds of talks in recent months—including negotiations in Switzerland in June—had produced preliminary frameworks for reopening the waterway, but disagreements over freedom of navigation and nuclear issues kept the parties at an impasse, according to Al Jazeera and Le Monde.
Trump claimed that both sides were “close to a new deal,” though Iran initially denied that talks were actively planned, according to Sky News and CBS News. The proposed agreement would reopen the Strait of Hormuz and lift the U.S. blockade on Iranian ports, with nuclear negotiations potentially postponed to a later phase, according to earlier reports from Axios and Reuters.
The cancellation follows a pattern of military pauses and threats that have characterized the 2026 conflict. Earlier in July, Trump had threatened strikes multiple times before pausing for diplomatic efforts, according to the New York Times and Time magazine. Each shift in posture—whether toward escalation or negotiation—has moved oil prices and equity markets in opposite directions, reflecting investor sensitivity to Middle East geopolitical risk.
What the Strait of Hormuz Dispute Means
The Strait of Hormuz has become the linchpin of U.S.-Iran negotiations because control over the waterway carries enormous economic and strategic weight. When Iran threatened to close it earlier in the conflict, oil markets spiked; when negotiations hint at reopening it, prices fall. The preliminary framework agreements reached in May and June called for Iran to reopen the strait to prewar capacity within 30 days, according to the Washington Post, but disagreements over who controls navigation rights have stalled final agreement.
The Monday talks will test whether both sides can move beyond these sticking points. Trump’s decision to pause military action suggests he believes negotiation remains viable, though the history of collapsed ceasefires and surprise attacks in this conflict underscores the fragility of any agreement. For markets, the stakes are clear: a lasting deal on the Strait of Hormuz would stabilize oil prices and reduce geopolitical risk premiums baked into equity valuations.
Sources
- Reuters — Trump calls off Iran attack, sets talks for Monday; stock market and oil price reaction; Strait of Hormuz negotiations framework
- AP News — Trump said he would order U.S. forces to hold off on new strikes against Iran; oil prices fell sharply
- The Guardian — Trump says Iran talks set for Monday as Tehran and Oman discuss strait of Hormuz deal
- Al Jazeera — Iran war escalation context, ceasefire collapse in July, Strait of Hormuz negotiations roadmap
- CNN — Trump’s retaliation threats after Iran’s surprise attack, military escalation timeline
- CNBC — Oil prices fell after Trump canceled planned strikes; market reaction
- Energy News — Oil prices dropped more than $5 per barrel as Trump held back attack
- Detroit News — S&P 500 gained 1.48%, Dow hit record high on Iran talks announcement
- Yahoo Finance — S&P 500, Dow, Nasdaq futures rise as Trump calls off Iran attack
- Investopedia — Stock market gains and oil price declines following Trump’s Iran decision
- Sky News — Trump claimed talks happening; Iran denied planned negotiations
- CBS News — U.S.-Iran negotiations set to begin Monday despite conflicting statements
- Axios — Iran’s proposal to reopen Strait of Hormuz while postponing nuclear talks
- Le Monde — Iran-U.S. negotiations stalled over Strait of Hormuz freedom of navigation
- New York Times — Trump held off on major escalation against Iran in late July
- Time Magazine — Trump threatened massive attack to force Iran to negotiating table
- Washington Post — Iran working to reopen strait within 30 days under preliminary framework
- YIP Institute — Strait of Hormuz carries roughly 20 percent of global oil
