Micron Gives Up Post-Earnings Gain as Tech Sell-Off Deepens

Micron Technology shares fell about 5% in premarket trading Friday, erasing most of the 15% jump that followed its blowout earnings report two days earlier. The drop came as a broad sell-off swept through semiconductor stocks, with Intel off 3%, Sandisk down 5%, Arm losing 4%, and Marvell declining 3.7%.

Investors are starting to question the price tag of the AI infrastructure buildout. Even after Micron posted third-quarter revenue of $41.46 billion – more than quadruple the year-ago $9.3 billion – and guided the current quarter to roughly $50 billion, compared with $11.3 billion a year earlier, the stock couldn't hold those levels. The surge in revenue reflects hyperscalers buying huge volumes of memory chips for data centers, a theme that has tightened supply for PCs and smartphones and pushed prices higher.

The broader market mood turned cautious. In Europe, ASML fell 2.2%, Infineon lost 3.7%, ST Microelectronics shed 3.3%, and Be Semiconductor dropped 2%. SoftBank plunged more than 12% in Tokyo, extending the risk-off rotation out of high-multiple AI plays.

Micron has gained 863% over the past year. The stock carries an Alpha Score of 79 out of 100, labeled "Strong," reflecting continued momentum. The pullback tests whether that momentum can absorb the broader market's reassessment of AI capital spending. For a full breakdown of Micron's valuation and positioning, see the MU stock page. Broader sector rotation trends appear on the stock market analysis page.

The week's pattern – a 15% surge on earnings, then a 5% retreat – highlights the tug-of-war between Micron's fundamental strength and the market's fear that AI spending has already been priced in. Traders will watch whether the stock stabilizes above the pre-earnings level or loses that floor in the coming sessions.