Stock Market Rallies Near Record as Oil Prices Ease Inflation Fears

Wall Street woke Monday to better news on the oil front, and the stock market responded with conviction. The S&P 500 climbed 1.5%, closing at 7,600.50—just 0.1% shy of the all-time high it had set earlier in the summer. The Dow Jones Industrial Average broke through to a record of its own, gaining 693 points to 53,178.41, while the Nasdaq composite surged 2.1% to 25,913.90. The catalyst was straightforward: crude oil prices had eased, which meant the inflation fears that had roiled markets all month could finally catch their breath.

July had been a bruising month of whipsaw trading. Oil had careened between $72 and $102 a barrel as the war with Iran created genuine uncertainty about whether tankers could move freely through the Persian Gulf to deliver crude to the rest of the world. Every time the conflict seemed to escalate, prices spiked. Every time tensions appeared to cool, they fell. The S&P 500 had ridden that same volatile wave, ending July roughly where it started—exhausted but unbroken. Then, over the weekend, President Donald Trump announced he would hold off on new military strikes against Iran, heeding the counsel of regional allies. That single statement shifted the entire calculus. Brent crude sank 4.7% to $83.77, and with it went much of Wall Street's anxiety about runaway energy costs feeding inflation.

The relief rippled through the bond market as well. The yield on the 10-year Treasury fell from Friday's 4.75% to 4.68%, though it remained well above the 3.97% level from before the Iranian conflict began. Higher yields have real teeth—they make borrowing more expensive for households and businesses, they threaten to undercut stock valuations, and they've already pushed the average long-term mortgage rate to its highest level in a year. Even a modest decline was enough to ease some pressure.

Companies with large fuel bills led the charge. United Airlines climbed 5.8%, American Airlines rose 5%, and Norwegian Cruise Line Holdings jumped 6.6%. Boeing added 8% after U.S. regulators certified its 737 MAX-7 for commercial service. Tyson Foods, the meat processor, gained 2.8% after reporting spring profits that exceeded analyst expectations. CEO Donnie King noted that strength was holding in the company's chicken business and its prepared foods division, which includes brands like Jimmy Dean and Hillshire Farm.

Tyson's beat was part of a broader pattern. More than half of the companies in the S&P 500 had already reported spring earnings, and the results were running 47% higher than the same quarter a year earlier, according to FactSet. If that pace holds through the full reporting season, it would mark the strongest earnings growth since spring 2021, when the economy was surging out of the COVID-19 pandemic. That matters because stock prices, over the long term, follow corporate earnings. Wall Street had grown nervous that valuations had gotten ahead of the fundamentals. Monday's earnings momentum helped quiet those doubts. Manufacturing data added to the optimism—a report showed that U.S. factory growth had accelerated to its strongest pace since 2022.

But the market's confidence was not complete. Semiconductor stocks—the beneficiaries of the artificial intelligence boom—continued their erratic dance. Micron Technology swung from a 6.4% loss to a 1.7% gain during the session before settling with a 0.8% advance. The stock is up roughly 190% for the year, but investors remain uncertain whether the surge in chip revenues driven by AI spending will prove durable or whether it represents a temporary bubble. If companies decide that AI is generating less profit and productivity than they had hoped, they could slash their spending on data centers, which would crater the stocks that have soared on those expectations.

The volatility was even more pronounced in South Korea, where the Kospi index is heavily weighted toward just two tech giants: Samsung Electronics and SK Hynix. Seoul's Kospi fell 5.1% on Monday, a sharp reversal from Friday's 17.9% surge—the index's best day in history. In Japan, Tokyo's Nikkei 225 declined 0.9% after the United States and Japan jointly moved to support the yen against the dollar. A stronger yen would help contain inflation in Japan, but it could also weigh on Japanese exporters who rely on a weaker currency to keep their goods competitive abroad.

The S&P 500's near-miss of its record high leaves investors in a peculiar position: the market has rallied on easing geopolitical tensions and solid earnings, yet the underlying questions about whether valuations can be sustained remain unresolved. The next few weeks of earnings reports and economic data will determine whether Monday's optimism was justified or merely a pause in a longer period of uncertainty.