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Global Market: South Korea’s Kospi Plunges over 7% as Chip Stocks Tumble on CXMT Concerns

  • On Tuesday, South Korea's Kospi stock market plunged more than 7% intraday to its lowest level since July 31, extending a dramatic reversal for what was once the world's hottest AI-fueled stock market.
  • Chinese memory-chip maker CXMT plans to introduce a new server-memory product by year-end, a development Chris Weston, head of research at Pepperstone, said is "challenging established assumptions around market share, pricing power and the durability of margins."
  • AI chip heavyweights Samsung Electronics and Hynix led the losses, falling 9% and 10% respectively, while weakness spread across Asia as Japan's Nikkei and Taiwan's Taiex both fell around 3%.
  • Broadcom CEO Hock Tan warned Monday that capital, rather than chips or electricity, could become the biggest constraint on the AI industry's growth, adding to investor concerns over pricing power.
  • While CXMT has yet to demonstrate it can manufacture this technology at scale, investors are looking beyond AI demand alone to assess how the industry's massive infrastructure buildout will be financed.
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There were no significant negative factors on the 13th capable of bringing down the KOSPI. The U.S. bond market, which had been pressuring global stock markets, took a breather on the 12th (local time), while international oil prices are fluctuating at levels they had surged to in the middle of last month. The fact that China's Changxin Memory (CXMT) announced its technological pursuit amplified concerns about intensifying competition in the sem…

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asiae.co.kr broke the news on Monday, October 12, 2026.
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