Micron Technology stock surged 16% on July 30, 2026, bouncing back sharply after a month-long selloff that erased $1 trillion from the chip sector’s market value. The memory chipmaker closed at $863.94, up from $739 on the previous day, as semiconductor stocks rebounded on strengthening demand signals from cloud computing.
The rebound came after Microsoft reported Azure cloud revenue grew 43% in its fiscal fourth quarter, the fastest quarterly growth in four years. Azure revenue surpassed $100 billion for the first time during the fiscal year ended in June, signaling robust demand for the cloud infrastructure that chipmakers supply. Microsoft’s stock surged 16% following the earnings announcement, igniting a broader technology rally that lifted chip stocks across the board.
The gains reversed a brutal month for semiconductor stocks that began in early July. According to CNBC, the world’s most valuable chip stocks lost more than $1 trillion in market value between late June and late July, with Nvidia shedding $238 billion, SK Hynix losing $176 billion, Samsung Electronics down $173 billion, and Micron falling $113 billion. The Philadelphia Semiconductor Index dropped nearly 20% over the month before rebounding 6.8% on July 30.
The selloff was driven by multiple concerns about the sustainability of artificial intelligence infrastructure spending. Analysts pointed to worries that hyperscalers’ capital expenditures may be “peaking faster than expected,” combined with concerns about competition from Chinese AI startups developing their own chips. SK Hynix missed analyst estimates despite posting record quarterly profit, triggering additional selling pressure.
Michael Field, chief equity strategist at Morningstar, attributed the decline to sentiment rather than fundamentals. “Simply put, it’s loss of confidence,” he said. “We continue to see upside in many AI names, but these are growth stocks, and, as such, much of their value comes from cash flows expected far out into the future, which requires a lot of faith from investors.”
Charlie Dai, VP principal analyst at Forrester, described the selloff as “less about weakening AI demand and more about a repricing of expectations after an exceptionally strong rally.” He noted that investors were reassessing whether near-term revenues can justify unprecedented AI spending levels while also worrying about growing competition in chips and AI infrastructure.
The July 30 recovery suggests that Microsoft’s strong cloud growth has restored some confidence in the AI infrastructure narrative. Analysts including those at Aberdeen Investments viewed the recent pullback as creating opportunities to add exposure to high-quality chipmakers at more reasonable valuations. The Philadelphia Semiconductor Index has still gained 92% over the past 12 months despite the recent volatility, reflecting the longer-term strength of the AI boom.
Micron stock remains up roughly 190% year-to-date, though the July selloff demonstrated the sector’s sensitivity to shifts in investor sentiment about AI spending sustainability and competitive threats. The rebound on July 30 indicates that strong cloud growth from major hyperscalers like Microsoft may be sufficient to support chipmakers’ valuations, at least in the near term.
Sources
- CNBC — reported chip stocks shed more than $1 trillion in market value, with Micron, Nvidia, SK Hynix, Samsung, and other major chipmakers losing significant value; included analyst commentary from Michael Field and Charlie Dai
- Bloomberg — reported Microsoft’s Azure cloud revenue grew 43% in fiscal Q4 2026, the fastest quarterly growth in four years, and that Azure revenue surpassed $100 billion for the first time
- Yahoo Finance — provided Micron stock price data showing the July 30 surge and year-to-date gains of approximately 190%
- DataForSEO search results — confirmed the Philadelphia Semiconductor Index performance and broader chip sector rebound on July 30, 2026
