AI Stock Rout: Micron Plunges 7%, Broadcom Falls 2.7% as $100 Oil Fuels Sell-Off

The AI sector, which defied gravity for much of 2026, is suddenly facing a reckoning. Memory giant Micron lost 7% of its value on Friday, and networking powerhouse Broadcom shed 2.7%, in a rout that signals deep unease about the economic assumptions underpinning the AI boom. With oil costs skyrocketing and trade tariffs adding to the cost of hardware, the euphoric spending on AI infrastructure may confront harsh economic reality.

Global equity markets ended the week in turmoil on Friday, July 24, 2026, as a sharp sell-off in AI-related shares collided with Brent crude oil surging past $100 per barrel for the first time in months. Asian bourses led the declines, with major indices skidding in a broad-based retreat from technology names, while Wall Street closed mixed, masking underlying sectoral stress. The S&P 500 finished at 7,411.98, eking out a mere 3.68-point gain, yet still notching its second consecutive losing week—the first back-to-back weekly decline since March. The Dow Jones Industrial Average rose 235.60 points, or 0.5%, to 51,947.25, powered by value and commodity-linked stocks, whereas the Nasdaq Composite dropped 161.87 points, or 0.6%, to 24,975.82, dragged lower by heavy losses in semiconductor giants. The divergence underscores a market gripped by contradictory forces: the resilience of traditional industries amid geopolitical energy price spikes, and the vulnerability of growth sectors to tightening financial conditions and supply-side cost pressures.

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Memory giant Micron lost 7% of its value on Friday, and networking powerhouse Broadcom shed 2.7%, in a rout that signals deep unease about the economic assumptions underpinning the AI boom.

The week’s escalation in the U.S. war with Iran emerged as the dominant macro risk, disrupting oil tanker routes through the Strait of Hormuz and threatening a sustained interruption to global crude supply. Brent crude, the international benchmark, breached the psychological $100 barrier midweek, settling near that level on Friday after a modest dip—the first daily decline in a week—as traders weighed retaliatory strikes and diplomatic signals. This energy shock compounds pre-existing anxieties over President Trump’s latest round of tariffs, which renewed trade war fears and stoked worries about imported inflation. Consumer and producer price data earlier in the month had already pointed to stubborn inflationary pressures, reducing the probability of Federal Reserve rate cuts in the near term. Higher-for-longer interest rates disproportionately penalize high-growth tech and AI companies, whose valuations rely on discounted future cash flows.

AI-related equities bore the brunt of the selling. Micron Technology plummeted 7%—a staggering one-day drop that wiped out billions in market capitalization—while Broadcom fell 2.7%. Both firms are integral to the AI infrastructure supply chain, producing memory chips and networking semiconductors essential for training large language models and scaling data center capacity. The rout suggests investors are repricing the AI theme amid fears that rising energy and borrowing costs could slow enterprise AI adoption and capital expenditure plans. Hyperscalers like Microsoft and Google have previously signaled aggressive spending on AI infrastructure; a sustained oil shock could compress their margins and delay deployment timelines. The sell-off in Asia, where many AI component manufacturers and assembly operations are based, amplified the global nature of this reappraisal. Shares in South Korean memory makers and Taiwanese foundries also declined sharply, though the Associated Press report did not provide specific index levels.

The market’s breadth camouflaged the underlying weakness. Within the S&P 500, more stocks rose than fell, a reflection of rotation into defensive sectors and energy names that benefit from higher oil prices. However, the market-cap-weighted index was held back by the outsized influence of mega-cap tech. This phenomenon—a “stealth correction” where index levels appear stable while growth leaders crack—has historically preceded broader market pullbacks. The Dow’s outperformance further illustrates the rotation: its components include energy, industrial, and financial firms that are less sensitive to tech valuations and may even gain from higher commodity prices and a steeper yield curve.