Full Breakdown
SK Hynix Shares Plunge Amid AI-Spending Doubts and China Competition
7/28/2026, 8:19:33 PM
Core Event: Sharp Decline in SK Hynix Stock
On July 28, South Korea’s semiconductor sector suffered a steep sell-off. SK Hynix shares fell between 13 % and 15 % in a single session, sending its U.S.-listed ADR below the July 9 offering price of $149. The broader KOSPI index dropped 11 %—its worst single-day loss in nearly five months—after Samsung Electronics and other chipmakers also slid sharply.
Background & Context: AI Boom, Valuation Pressures, and Chinese Advances
SK Hynix and Samsung have been primary beneficiaries of the AI hardware surge, supplying high-bandwidth memory (HBM) to hyperscalers such as Nvidia. Their valuations rose to triple-digit multiples earlier in the year, prompting investors to question whether AI-related spending can sustain those levels.
Two developments intensified the sell-off. First, a report that Chinese firms are progressing with deep-ultraviolet (DUV) lithography machines raised fears of a new wave of memory-chip capacity. Second, the market debut of ChangXin Memory Technologies (CXMT) on the Shanghai exchange—up more than 460 % on its first day—highlighted China’s drive to build an independent AI-chip supply chain. Both factors fed concerns that global memory pricing could face oversupply pressure.
Data & Statistics: Market Moves and Valuation Shifts
- SK Hynix: down 13 %–15 % on July 28; ADR fell to $143.02.
- Samsung Electronics: fell more than 12 % on the same day.
- KOSPI: down 11 % (10.84 % at close), breaching the 6,000 level for the first time since April 14.
- Forward-earnings multiple for SK Hynix: 3.7 ×, roughly half the 6.2 × multiple of peer Micron Technology.
- Analysts expect June-quarter sales of about $57 billion—more than three times the prior-year figure—and a sixfold rise in operating profit.
Official Statements & Responses
James Ooi, market strategist at Tiger Brokers, warned that “SK Hynix’s earnings may also become a global sentiment test for AI hardware,” underscoring the stock’s sensitivity to any earnings miss.
Conflicting Reports & Gaps
Sources differ on the exact magnitude of SK Hynix’s decline: Bloomberg cites “more than 13 %,” Reuters records a 14 % fall, while another outlet reports 14.7 %. The precise identity and performance of the Chinese DUV lithography firms remain undisclosed, leaving investors without concrete timelines for capacity expansion.
Verbatim Quotes
- “The debate now is whether memory is taking too much of the pie,” — Andy Wong, head of multi-asset at Pictet Asset Management HK Ltd.
- “We believe the market was likely spooked by the progress of China’s chip-making equipment capabilities, and was worried that this progress would threaten the competitive position of global chip making and chip equipment leaders,” — Jing Jie Yu, equity analyst at Morningstar.
What’s Next
Investors await the second-quarter earnings reports from SK Hynix and Samsung later this week, which will provide the first post-sell-off data on AI-related demand and pricing trends. Market participants will also monitor Nvidia’s financing discussions with OpenAI, as a potential $250 billion backstop could influence perceptions of AI-infrastructure funding. Continued developments in Chinese memory-chip capacity and DUV lithography will remain key variables shaping sentiment toward South Korean semiconductor stocks.
