Memory and storage stocks are selling off sharply in early trading Tuesday, reversing Monday’s rebound. Micron Technology (NASDAQ:MU | MU Price Prediction) shares are down 7% to $917, SanDisk (NASDAQ:SNDK) stock is off 7% to $1,616, and Western Digital (NASDAQ:WDC) shares are dropping 7% to $537.
The selling extends across the group. Seagate Technology (NASDAQ:STX) stock is down 5% to $822, and the Roundhill Memory ETF (CBOE:DRAM) is trading 6% lower at $61. The moves are chip-specific, and the Dow is actually in the green Tuesday morning.
Samsung’s Record Beat Sparks a Paradoxical Selloff
The catalyst is Samsung Electronics. The Korean giant reported a preliminary Q2 operating profit of about $58 billion, a 19-fold jump from a year earlier that exceeded analyst estimates. Despite the record print, Samsung shares fell 7%, and as much as 10% intraday in Seoul.
The reaction reflects profit-taking after Samsung stock surged 150% this year, and Deutsche Bank flagged that results were “only” 6% ahead of estimates. The bigger concern is about whether semiconductor and AI-adjacent companies can sustain these margins going forward. SK Hynix also traded lower in Asia, and that overhang has followed the tape into U.S. memory names.
Peers Follow the Move After a Historic Run
The selloff hits a group that has been the year’s runaway trade. Micron stock was up 245% year to date (YTD) heading into today’s session, with the forward P/E ratio at 7x against a trailing P/E ratio of 22x. Micron’s fiscal Q3 2026 print delivered revenue of $41.46 billion, up 346% year over year (YoY), with non-GAAP gross margin of 85%.
SanDisk stock had climbed 635% YTD, and Western Digital shares were up 235% YTD. Meanwhile, Seagate stock had risen 216% YTD. Those gains explain the sensitivity: any hint of demand fatigue lands hard on richly priced names. Samsung, SK Hynix, and Micron each topped $1 trillion in market value in May before pulling back.
The Bull Case Still Has Legs
The setup for memory hasn’t broken. Samsung’s operating profit was a record, a critical high-bandwidth memory (HBM) supply bottleneck is seen persisting well into 2027, and last week analysts at UBS and Bank of America framed the pullback as a “healthy reset” in a memory supercycle rather than a structural break. Micron’s Q4 2026 guide of $50 billion plus or minus $1 billion in revenue underscores that pricing power.
The bear case is the mirror image. These are high-beta names, with Micron’s beta at 2.14 and Seagate’s at 2.07, and the AI trade faces valuation scrutiny after a vertical run. The prediction markets are already leaning cautious: the crowd assigns a 58% probability that Micron stock closes lower on July 7, though the current reality is probably more pessimistic than that. Reddit sentiment for Micron shares bottomed near 28 last Friday before rebounding.
What to Watch
Investors can watch for whether Micron stock holds above the $900 level, a line that prediction markets currently peg with 87% probability of being tapped this week. A decisive break lower would signal that the profit-taking is turning into something more durable, while a hold and reclaim would suggest the Samsung read-through is being absorbed as noise rather than a trend change.
Given the volatility, investors should consider keeping their position sizes modest until the sector digests the Samsung read-through. Analyst notes and any SK Hynix commentary later this week could reset the tone for the group, and the next Micron and SanDisk quarterly updates will be the real tests of whether AI-driven memory pricing power is holding.
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