The chipmaker's revenue surged 346% year-over-year, but a 22% post-earnings selloff shows Wall Street wants receipts, not promises, on AI's staying power.
Micron Technology pulled off one of the most impressive earnings reports in recent semiconductor history, and the market’s response was to sell the stock into the ground.
The memory chipmaker reported fiscal Q3 2026 revenue of approximately $41.5 billion, up from $9.3 billion in the same quarter a year earlier. Gross margins hit 84.9%. Adjusted EPS came in at $25.11. By almost every traditional measure, Micron crushed it. And yet, after an initial post-earnings pop of 13-15%, the stock reversed course violently, declining more than 22% by early July and falling below where it traded before earnings dropped.
The show-me market
Micron’s stock had already risen more than 250% year-to-date heading into the June 24 earnings report. Its market capitalization briefly topped $1 trillion in May 2026. In early June, Micron shares took an 8%-plus hit on June 4, followed by another 13% decline on June 5. The catalyst wasn’t anything Micron did. Broadcom issued softer guidance on its AI ASIC business, and that was enough to send tremors through every stock riding the AI wave.
The post-earnings selloff compounded those fears. Investors looked at the guidance, which projected around $50 billion in revenue for Q4 2026, and instead of cheering the growth, they started asking whether AI infrastructure spending from hyperscalers like Microsoft, Google, and Amazon can sustain these trajectories.
Supply constraints meet demand anxiety
CEO Sanjay Mehrotra has been consistent in his messaging: demand for high-bandwidth memory is outstripping what Micron can produce. All of the company’s HBM production for 2026 is fully allocated, meaning every chip rolling off the line already has a buyer. Mehrotra noted that Micron can only meet 50-60% of some customer demand, and he projects this tightness will persist beyond 2027.
Data centers now represent more than 50% of Micron’s customer base, a structural shift driven almost entirely by AI workloads. The company is investing heavily in US fabrication capacity to try to close the supply gap.
What this means for investors
The Broadcom-triggered selloff in early June demonstrated how interconnected these bets are. A guidance miss from one AI-adjacent company sent ripples through the entire sector. Micron’s Q4 guidance of roughly $50 billion in revenue will be the next major data point. If there’s any whiff of softening demand from hyperscalers, the 22% post-earnings decline could look like a warm-up act.
When a stock runs 250% in six months, the bar for “good enough” earnings becomes almost impossibly high. Micron cleared it on the numbers and still got punished. That gap between fundamentals and sentiment is where the real risk, and the real opportunity, tends to live.
