Chinese chipmaker CXMT surges 466% in Shanghai trading debut
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Chinese chipmaker CXMT surges 466% in Shanghai trading debut
Samsung ElectronicsCXMTSK HynixNvidiaOpenAI

South Korean chip stocks face intensified sell-off as investors ditch shares amid AI investment concerns and competition from China

South Korean chip stocks, including Samsung and SK Hynix, plummeted over 10% amid growing investor concerns about AI spending and competition from China, driving the Kospi index to its lowest level in three months, as fears mount over the financial health of AI companies funding datacentre expansions.

The Guardian The Guardian28 July 2026 · 10:13 UTC
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South Korean semiconductor stocks are facing a significant sell-off, with Samsung and SK Hynix both dropping over 10%. This decline is attributed to investor concerns regarding AI investment and competition from China, leading to the Kospi index hitting its lowest point in three months.4

The sell-off has intensified as investors react to the huge borrowing by AI companies for datacentre expansions. Analysts have noted that the competition from cheaper Chinese firms is also a significant factor. For instance, China has commenced mass production of homegrown deep ultraviolet (DUV) chip-making tools, which poses a direct threat to South Korean manufacturers.

In addition, shares of the Chinese memory chip maker CXMT surged by 466% upon its debut on the Shanghai stock exchange, highlighting the competitive landscape. The Wall Street Journal reported that Nvidia's stock fell 5% after discussions about a $250 billion datacentre project with OpenAI, further indicating the volatility in the tech sector. Nvidia’s five-year CDS spiked, suggesting that it may not be the right time to buy the dip.67

Overall, the combination of AI investment concerns and Chinese competition is reshaping the landscape for South Korean chip stocks, prompting a reevaluation of their market positions.

Key Insight
“Investors are increasingly worried about the significant borrowing by AI companies for datacentre expansions, contributing to the sell-off. Meanwhile, China has begun mass production of homegrown deep ultraviolet chip-making tools, further intensifying competition in the semiconductor market.”
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“Samsung and SK Hynix fall by more than 10% amid renewed fears over AI spending and Chinese competition”
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