Micron and SanDisk Stocks Decline Amid Competition Fears

Samsung's blockbuster second-quarter earnings and plans to build new semiconductor fabrication capacity sent shockwaves through the memory chip industry on July 7, 2026, pressuring MU and other memory stocks even as Samsung's own results beat expectations. Micron shares fell roughly 7% , as investors weighed Samsung's confirmation that it is building substantial new fabrication plants that could add supply and narrow the industry's supply-demand gap.

Samsung reported operating profit surging roughly 19-fold year over year to about $58.4 billion, with sales up 28% sequentially, yet the sector's reaction was negative: the market had already priced in blowout memory results after a year of AI-driven demand, so attention shifted instead to Samsung's capacity expansion plans and what they could mean for pricing power industry-wide.

Meanwhile, speculation is building that SNDK could split its stock before the end of 2026, a call fueled by shares trading near $1,750 apiece after SanDisk's February 2025 spinoff from Western Digital began trading around $22. A split would not change the company's fundamentals but could increase liquidity and make shares more accessible to retail investors, and the speculation has added to volatility in the name.

The broader data storage sector absorbed losses alongside Micron and SanDisk, with Western Digital also sinking roughly 7% on the same news. Despite the pullback, the memory shortage driving elevated prices is expected by several analysts to persist into 2027 or later, and Micron's own fiscal third-quarter revenue jumped 346% year over year to a record $41.5 billion.

Investors will be watching whether Samsung's expanded capacity actually materializes into meaningfully higher industry supply, and how quickly it could narrow the pricing tailwind that has driven memory stocks higher for much of 2026, alongside any formal announcement from SanDisk on a potential stock split.

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