CXMT’s 466% Debut Rattles AMD; SanDisk, Micron, SK Hynix Slide

The sharp sell-off impacting SanDisk (SNDK), Micron (MU), and broader semiconductor/AI names like AMD is driven by a mix of long-term competition threats,

Written by: Olumide Adesina • Tuesday, July 28, 2026 • 1 min read

• Last updated: Tuesday, July 28, 2026

Stocks are making a recovery after sharp decline the previous day.

The sharp sell-off impacting SanDisk (SNDK), Micron (MU), and broader semiconductor/AI names like AMD is driven by a mix of long-term competition threats, analyst downgrades, and profit-taking following a massive run-up.

SanDisk Shares Under Pressure as Memory Cycle Risks Return Ahead of Earnings

The primary catalyst sparking the late-July pullback across memory and storage stocks is the high-profile IPO of ChangXin Memory Technologies (CXMT) on Shanghai’s STAR Market.

CXMT raised roughly $9 billion, with its stock surging after launch. As China’s leading DRAM manufacturer, CXMT’s aggressive expansion fuels investor anxiety over a potential future glut in global DRAM and NAND supply, which could erode the high gross margins incumbents currently enjoy.

Reports that tier-1 supply chains (like Apple) are evaluating Chinese memory chips accelerated fears that low-cost alternatives could challenge Western market share sooner than expected.

Earlier in July, a significant downward revision from Korea Investment & Securities on SK Hynix rattled the entire memory complex. A 15%+ single-day drop in SK Hynix created a ripple effect across the sector.

SanDisk and Micron took heavy damage due to high operational leverage. Because memory products (DRAM/NAND) function as commodities, even slight adjustments to future pricing assumptions trigger sharp valuation pullbacks.

While pure-play memory names like SanDisk and Micron dropped double digits, logic chipmakers like AMD and Nvidia were pulled down by broader macro/sector headwinds:

AI Circular Financing & ROI Questions: Wall Street has grown increasingly cautious amid the massive capital expenditure (CapEx) targets set by hyperscalers, raising concerns about near-term returns on AI hardware.

Aggressive Profit-Taking: Stocks across the sector experienced historic runs through the first half of the year (with memory and storage stocks up several hundred percent). When fresh competitive news or analyst cuts break, elevated positioning often leads to sharp, synchronized pullbacks.

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ABOUT THE AUTHOR See More

Olumide Adesina

Financial Market Writer

Olumide Adesina is a French-born Nigerian financial writer. He tracks the financial markets with over 15 years of working experience in investment trading.