U.S. stocks rose on Friday, July 31, 2026, to close out a highly volatile month for Wall Street. A massive surge in Amazon shares managed to offset a sharp decline in Apple, even as rising oil prices and mounting bond yields intensified broader worries about persistent inflation.
The S&P 500 climbed 52.09 points, or 0.7%, to finish at 7,489.72 after veering between gains and losses throughout the session. The Dow Jones Industrial Average added 276.97 points, or 0.5%, to close at 52,485.03, while the tech-heavy Nasdaq composite rallied 251.68 points, or 1%, to 25,373.85, recovering from a brief midday dip that erased an early 1.3% jump. Despite Friday’s gains, which secured the S&P 500’s first winning week in three, the benchmark index ended July with a marginal monthly loss.
The Tech Divergence: Amazon’s Cloud Surge vs. Apple’s Supply Crunch
The final trading day of July highlighted a stark divergence within the tech sector. Amazon led the market’s upward momentum, leaping 15.3% after reporting quarterly profits that more than tripled compared to the previous year. This explosive growth was driven primarily by an acceleration in its cloud computing division, AWS. Wall Street analysts viewed the results as concrete evidence that Amazon’s massive capital expenditures in artificial intelligence (AI) are starting to generate substantial returns. Consequently, Amazon raised its investment spending forecast for the remainder of the year.
This positive reaction mirrored Microsoft’s performance earlier in the week, when its stock recorded its best single-day gain in nearly 18 years on similar AI monetization signals. However, other tech giants did not fare as well. Apple shares tumbled 7.4% despite beating quarterly profit expectations. Investors reacted negatively to Apple’s disappointing revenue growth forecast for the current quarter, which company executives attributed to a severe component supply crunch as the industry-wide AI boom vacuums up critical hardware.
The supply-and-demand volatility also triggered wild swings among semiconductor manufacturers. Micron Technology, for instance, surged 6.4% early in the day, only to plunge 6.5% before finally closing with a 5.9% loss.
Geopolitical Friction and Energy-Driven Inflation
Underpinning the stock market’s volatility is the ongoing geopolitical conflict involving Iran, which has severely disrupted crude oil flows in the Middle East. Brent crude, the international benchmark, rose 1.2% on Friday to settle at $87.93 per barrel. Over the course of July, Brent prices careened wildly between a low of $72 and a high of $102.
The spike in oil has had an immediate impact on American consumers. According to AAA, the average price for a gallon of regular gasoline in the United States climbed to nearly $4.11, up from $3.85 just a month prior. Beyond the gas pump, elevated energy costs are exerting upward pressure on shipping and logistics, raising the baseline price of consumer goods transported via ships, planes, and trucks.
Federal Reserve Credibility and Bond Yield Spikes
Fears of prolonged inflation sent shockwaves through the fixed-income market. The yield on the 10-year U.S. Treasury note rose to 4.71% on Friday, up from 4.68% on Thursday and a mere 3.97% before the outbreak of hostilities with Iran. This rapid ascent in long-term yields has already pushed average U.S. mortgage rates to their highest levels in a year.
Bond yields surged earlier in the week after Federal Reserve Chairman Kevin Warsh reiterating his commitment to bringing inflation back down to the central bank’s 2% target, but declined to provide a concrete roadmap. The Fed chose to keep its benchmark interest rate steady, despite inflation remaining stubbornly high. Warsh has publicly stated he intends to make decisions based on “unfiltered” market data rather than giving forward guidance to Wall Street.
This approach has drawn criticism from market observers. “Without clarifying why action was or wasn’t taken already, it’s hard to see how statements about being committed to hitting its inflation target aren’t just a bluff,” noted Brian Jacobsen, chief economic strategist at Annex Wealth Management. Economists at Bank of America added that the Fed faces “a growing credibility problem” and must deliver a rate hike and a cohesive policy narrative at its upcoming September meeting to restore market confidence.
Global Market Context and Investor Sentiment
The volatility was not confined to U.S. exchanges. In South Korea, the Kospi index experienced a historic 17.9% single-day surge on Friday, propelled by chipmaking giants Samsung Electronics and SK Hynix, which both jumped more than 26%. Despite this record-breaking day, the Kospi still closed July with a staggering 22% monthly loss, erasing a portion of its massive gains from the first half of 2026.
As volatility persists, retail and institutional sentiment has shifted significantly. The Fear and Greed Index, which peaked at a “greedy” 71 in May 2026, has plummeted to 37, placing it firmly in “fear” territory. Nonetheless, market veterans point to classic investment principles during such pullbacks. Investing legend Warren Buffett famously observed that “bad news is an investor’s best friend,” as market downturns allow disciplined investors to acquire high-quality assets at a discount.