Global stock markets posted substantial gains Monday as investors welcomed news that the United States and Iran reached a tentative agreement to extend their ceasefire and reopen the Strait of Hormuz, a critical pathway for international crude oil shipments that has been disrupted for more than three months.
The S&P 500 rose 1.9% on optimism that the agreement signals a long-term resolution to a conflict that has driven inflation higher worldwide. The Dow Jones Industrial Average climbed 705 points, or 1.4%, as of 1:32 p.m. Eastern time, while the Nasdaq composite surged 3% higher. Brent crude oil fell 4.8% to $83.14, returning to early March levels and well below the $100-plus prices seen just weeks ago, though still elevated from the roughly $70 per barrel cost before the war began.
Energy Costs and Economic Impact
The decline in oil prices offers potential relief to households and businesses that have faced elevated costs for essential goods ranging from food to fuel to fertilizer due to the conflict with Iran. Lower energy prices could ease inflationary pressures that have complicated monetary policy decisions for central banks globally.
Iran confirmed the agreement, though its implementation awaits a formal signing ceremony scheduled for Friday in Switzerland, according to Pakistan. Broader negotiations on contentious issues including Iran's nuclear program are expected to continue over the next 60 days, leaving room for potential complications that could undermine the deal. Industry experts caution that even with the Strait of Hormuz reopened, the energy sector will require months to restore full operational capacity.
Market Winners
Companies with significant fuel expenses saw immediate stock price gains. United Airlines rose 4.7%, American Airlines climbed 3.3%, and cruise operator Carnival increased 3.6%. The artificial-intelligence sector also posted strong performance, with Micron Technology rallying 9.8%, Advanced Micro Devices rising 7.2%, and Nvidia climbing 3.6%. Nvidia's gain provided the strongest upward force on the S&P 500 given its position as Wall Street's most valuable company.
SpaceX, Elon Musk's rocket company that also owns AI company xAI, surged 14.2% in its second day of trading on Wall Street. The successful debut suggested robust investor appetite for AI-related investments remains intact. The market has assigned SpaceX a total valuation exceeding $2.1 trillion, surpassing the combined market capitalizations of Exxon Mobil, Bank of America, and Coca-Cola.
Federal Reserve Implications
In the bond market, Treasury yields eased on expectations that lower oil prices will reduce pressure on central banks to raise interest rates. The yield on the 10-year Treasury declined to 4.47% from 4.48% late Friday. The Federal Reserve will announce its latest interest rate decision later this week, marking the first under new chair Kevin Warsh, who was nominated by President Donald Trump. Trump has publicly advocated for lower interest rates.
Traders view it as nearly certain that the Fed will maintain its main interest rate unchanged after its two-day meeting concludes Wednesday. Previously, traders had been increasing bets on a potential rate hike this year due to persistent inflation and a solid U.S. job market. However, the tentative U.S.-Iran deal has shifted expectations, with traders now assigning only a 58% probability to a rate increase this year, down from 71% a week ago, according to CME Group data.
Corporate Developments
Roku fell 0.9% after announcing that Fox Corp. is acquiring the streaming pioneer in a cash-and-stock transaction valued at approximately $22 billion. Roku's stock had already jumped 20% Friday when early media reports about a potential deal emerged. The acquisition will provide Fox access to the Roku channel, first-party data, and more than 100 million global streaming households. Fox's stock declined 16.1%.
International Markets
Stock indexes climbed across Asia and Europe. Japan's Nikkei 225 jumped 5% to finish at a record high, with Takashi Hiroki, chief strategist at Monex, stating, "This is great news. Buying by foreign investors is leading the market with expectations of easing tensions around the situation in the Middle East." South Korea's Kospi surged 5.2%, supported in part by continued rallies for AI winners like Samsung Electronics. London's FTSE 100 was an outlier, slipping 0.4%.
Why This Matters:
The tentative Iran agreement represents a potential turning point for global energy markets and inflation trajectories that have complicated economic policy for months. Lower oil prices directly affect consumer purchasing power and business operating costs, potentially allowing the Federal Reserve greater flexibility in monetary policy without the immediate pressure of energy-driven inflation. However, the 60-day negotiation period and months-long recovery timeline for energy infrastructure mean uncertainty remains. For investors, the market response demonstrates confidence in diplomatic solutions over prolonged conflict, while the strong performance of fuel-dependent industries and continued AI sector strength suggests economic resilience. The deal's ultimate success will depend on implementation details and whether broader diplomatic progress can be achieved on nuclear and regional security issues.