Memory-chip maker Micron has lit a fire under the entire AI semiconductor sector. Strong quarterly earnings, paired with an upbeat forecast from Qualcomm, ignited a roughly $400 billion rally across AI chip stocks, according to Yahoo Finance and Crypto Briefing.
The headline numbers were striking. Micron posted record revenue on surging demand for the memory used in AI systems. Intellectia AI reported the company's fiscal Q3 2026 set a revenue record, while eciks.org said revenue quadrupled to $41.46 billion. Seeking Alpha framed the jump as a 346% revenue surge.
The results reshuffled Wall Street's pecking order. CNBC reported that Micron overtook Nvidia and Meta to become the market's new "margin king" — the company squeezing the most profit from each dollar of sales. TradingView noted Micron also briefly leapfrogged Meta and Tesla in the market on the AI chip demand surge.
Qualcomm added fuel. TradingKey reported its shares jumped 12% after hours, backed by Meta and Microsoft, with new AI inference chips that may push the stock past $300. The company also hiked its sales target.
The optimism rippled overseas. The Edge Malaysia reported Asian stocks surged as Micron's earnings eased fears about an AI slowdown, with South Korean shares climbing on AI optimism. Reuters, via KFGO, said South Korean chip shares jumped after Micron flagged strong AI-related demand.
There was a note of caution beneath the euphoria. TradingView argued Micron's record quarter exposed AI's "next trillion-dollar bottleneck" — the memory needed to feed increasingly hungry AI models.
Why it matters: memory chips were long seen as a commodity afterthought to flashy processors, but Micron's results suggest they are now a central, profit-rich chokepoint in the AI buildout — and a fresh signal that demand for AI infrastructure shows little sign of cooling.