President Donald Trump declared an interim deal with Iran "over" on July 8, 2026, triggering a 5.2% surge in oil prices and widespread market volatility that underscored the economic fragility created by months of conflict. Speaking at a NATO summit in Turkey, Trump said he had no interest in further talks with Iran and warned that Washington would likely carry out additional strikes on Wednesday night. "For me, I think it's over," he said, though he added that U.S. representatives could continue negotiations. "It's just a waste of time dealing with them."
Brent crude climbed 5.2% to $78.02 a barrel and briefly topped $80 after Trump's remarks. The jump reflected traders' concern that a continuation of the war could block the Strait of Hormuz and prevent crude from moving from the Persian Gulf to customers worldwide. That scenario would worsen inflation and force the Federal Reserve and other central banks to raise interest rates, compounding the economic damage already inflicted since the war began on February 28, 2026.
Market Reaction
The S&P 500 fell as much as 1.1% before trimming its loss to 0.3%, ending down 0.28% at 7,482.71. The Dow Jones Industrial Average dropped 576.76 points, or 1.1%, to 52,348.39. The Nasdaq composite rose 0.2% to 25,870.65 after erasing an early loss, though Nasdaq futures approached a four-week low as traders reassessed geopolitical risk.
Treasury yields rose with oil prices. The yield on the 10-year Treasury briefly neared 4.60% before pulling back to 4.57%, up from 4.55% late Tuesday and from 3.97% before the war began. Traders were pricing in a likely rate hike by the Fed's December meeting, according to CME's FedWatch. By Wednesday afternoon, traders were pricing in about a 69% chance of a U.S. rate hike in September, up from 62% on Tuesday.
Gold prices moved lower despite the geopolitical turmoil. Spot gold fell 0.9% to $4,067.39 an ounce by 2:10 p.m. EDT after hitting its lowest level since July 1 earlier in the session. U.S. gold futures for August delivery settled 1.8% lower at $4,082.40 an ounce. David Meger, director of metals trading at High Ridge Futures, said, "The main factor for today's move is the increased escalation in tensions between the U.S. and Iran, with a potential ceasefire over, we've seen risk assets across the board trade lower, gold included."
Bank of America said in a note dated Tuesday that it was reducing its 2026 average gold forecast by 14% to $4,360 on a more hawkish Fed, but still saw $5,000 in reach once the tightening cycle ends. Spot silver fell 2.9% to $58.25 an ounce, platinum shed 3.6% to $1,580.92 and palladium dipped 4.5% to $1,219.84.
AI Stocks and Asian Markets
In Asia, South Korea's Kospi dropped 5.3% amid sharp swings tied to AI stocks, while Hong Kong's Hang Seng index rose 3%. Shares of Chinese AI startup Zhipu, also known as Z.ai and traded as Knowledge Atlas Technology, jumped 13.4%. A six-month lock-up period for cornerstone investors after Zhipu's January trading debut in Hong Kong was set to expire that week, and China National Radio reported late Tuesday that nearly 70% of Zhipu's cornerstone investors were committed to stay on. Zhipu's share price had risen more than 1,300% since its debut.
IMF Downgrades Growth Forecast
The International Monetary Fund cut its 2026 global growth forecast to 3.0% from 3.1% in April and said growth should rebound to 3.4% in 2027. The IMF said the world economy had dodged a sharper downturn, with demand for artificial intelligence and other technologies helping offset a sharp drop in energy supplies caused by the war. Petya Koeva Brooks, deputy director of the IMF's research department, said, "In effect, we expect a V-shaped recovery, weaker growth this year relative to our pre-war forecast, followed by a rebound next year." She also said, "The world economy has weathered the shock from the war better than feared so far, with limited evidence of second round effects."
The IMF raised its 2026 headline inflation forecast to 4.7% from 4.4% in April and said it should fall to 3.9% in 2027. It said energy prices were 25% higher than before the war began and that the new forecast assumed the Strait of Hormuz would start to reopen in mid-July and traffic would gradually normalize by March 2027. It assumed an average oil price of $89 a barrel.
The IMF left its 2026 growth forecast for the U.S. economy unchanged at 2.3% and raised its 2027 forecast by 0.1 percentage point to 2.2%. It lowered the euro area's 2026 forecast to 0.9% from 1.1% in April and left 2027 at 1.2%. Japan's 2026 forecast edged down to 0.6%, with 2027 raised to 0.7%. South Korea's growth forecast was revised up by 0.7 percentage point to 2.6% because of strong AI hardware exports.
Emerging market and developing economies saw a 0.1 percentage point cut to 3.8% in 2026, with 2027 raised to 4.5%. China's growth was expected to reach 4.6% in 2026 and 4.1% in 2027. India's 2026 forecast was trimmed to 6.4% from 6.5%, while its 2027 forecast was lifted to 6.7% from 6.5%. The Middle East and Central Asia region saw its 2026 forecast cut by 1.2 percentage points to 0.7%, while its 2027 forecast was raised by 1.9 percentage points to 6.5%.
Risks Remain
The IMF said the war's economic damage had been limited partly because countries could draw on existing oil stockpiles and because oil-exporting countries outside the Persian Gulf stepped up production. Petya Koeva Brooks said countries had also adapted quickly by finding alternative routes and supplies. She warned, "There's still a lot of uncertainty," and said a renewed escalation could reignite commodity-price volatility, tighten financial conditions, strain policy buffers and worsen food insecurity in low-income countries. She also said higher oil prices could de-anchor inflation expectations and trigger a correction in financial conditions. Deniz Igan, who leads the IMF's work on economic updates, said, "A renewed conflict in the region is going to catch the global economy in a worse position than it was the first time."
Why This Matters:
The collapse of diplomatic efforts with Iran threatens to impose significant economic costs on American consumers and businesses through higher energy prices and tighter monetary policy. Energy prices are already 25% higher than before the war began, and a prolonged closure of the Strait of Hormuz would force the Federal Reserve to prioritize inflation control over economic growth, potentially triggering rate hikes that could slow job creation and business investment. The IMF's revised forecasts show that global economic resilience depends heavily on private sector adaptation and increased production from non-Persian Gulf suppliers, not government intervention. South Korea's upward revision based on AI hardware exports demonstrates how technological innovation and market-driven growth can offset geopolitical shocks. However, the warning that a renewed conflict would find the global economy "in a worse position" underscores the fiscal and economic vulnerability created by prolonged instability in a region critical to energy markets.