Western Digital shares fell 5.4% in premarket trading on Monday to $551 as a sharp selloff across global memory and storage stocks weighed on wdc stock sentiment, despite a broadly positive performance in the wider U.S. equity market.
The decline originated in South Korea, where SK Hynix suffered a drop exceeding 15%—the largest single-day decline in the company’s history. The move came as investors locked in profits after the stock’s strong rally ahead of last week’s Nasdaq listing, but weakness deepened when South Korean brokerage KIS published second-quarter 2026 earnings estimates for SK Hynix that came in approximately 8% below market expectations.
The weaker forecast reflected slower-than-anticipated HBM4 memory chip shipments and the company’s significant reliance on high-bandwidth memory contracts, limiting its ability to benefit from higher prices in the conventional DRAM market. The disappointing outlook triggered broad selling across the memory and storage industry.
Western Digital and SanDisk both fell more than 6% in premarket trading, while Micron declined over 5% and Seagate lost more than 4%. Investors viewed the lower earnings forecast as a potential indication that momentum in the memory supercycle may be beginning to slow, prompting a reassessment of valuations across the sector. The Roundhill Memory ETF (DRAM) fell 9%, with Samsung, SK Hynix, and Micron serving as its top three holdings and representing 73% of net assets, amplifying losses.
The sector-wide decline came despite recent support from Wall Street. Citi recently reaffirmed its Buy rating on Western Digital and increased its price target to $800, but the positive research note did little to offset the broader wave of selling affecting semiconductor stocks.
Concerns about memory oversupply have been building among analysts. Bloomberg Intelligence’s Shuli Ren argues that the global memory shortage peaked in Q2 2026 and could tip into oversupply by 2028. This view contrasts with the bullish case that has driven memory stocks up dramatically in 2026, with Western Digital up 238% year to date through Friday’s close, Micron up 243%, and SanDisk up 707%.
The decline in Western Digital contrasted with a stronger overall market backdrop. The S&P 500 rose 0.4%, the Dow Jones Industrial Average gained 0.3%, and the Nasdaq Composite added 0.3%, suggesting the selling pressure was driven by sector-specific concerns rather than broader macroeconomic factors. While today’s move reflects a sympathy selloff following weaker expectations for a major industry player, Western Digital remains caught between constructive long-term expectations for AI-related storage demand and short-term uncertainty surrounding the pace of growth in the memory market.
Sources
- Yahoo Finance — WDC premarket decline to $551, SK Hynix 15% drop, KIS earnings estimate 8% below consensus, HBM4 shipment concerns, Citi Buy rating and $800 price target
- 24/7 Wall St. — Memory sector selloff details, Micron/SanDisk/Seagate declines, DRAM ETF 9% fall with top holdings breakdown, Citi reaffirmation
- Yahoo Finance (Bloomberg Intelligence) — Shuli Ren analysis on memory shortage peak in Q2 2026 and potential 2028 oversupply
