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KRX activates buy-side sidecar for KOSPI on sharp rise

Program trading was halted for five minutes as the benchmark index climbed 4.42 percent on gains in chip stocks and stronger Wall Street cues.

  • On Tuesday, the Korea Composite Stock Price Index rose sharply, prompting the Korea Exchange to activate a buy-side sidecar when the index surged 5 percent or more.
  • South Korean markets tracked overnight gains on Wall Street, lifted by renewed optimism over AI-related stocks following Anthropic's IPO filing, while oil prices retreated on Qatari mediation hopes involving Iran and the United States.
  • KOSPI heavyweights surged across the board, with Samsung Electronics gaining 4.69 percent and Samsung Electro-Mechanics surging 8.77 percent, alongside other strong tech-sector performers.
  • The KOSPI opened significantly higher and continued climbing as program trading resumed, reflecting strong investor confidence in technology and semiconductor sectors.
  • Enthusiasm persists ahead of major tech earnings and the Federal Reserve's upcoming interest rate decision, as the Dow Jones Industrial Average and Nasdaq Composite also posted overnight gains.
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11 Articles

Left

The KOSPI surged 4% in early trading on the 27th, triggering a buy-side circuit breaker. This is attributed to a resurgence in investor sentiment toward the artificial intelligence (AI) industry as Antropics, the developer of the AI model Claude, commenced its initial public offering (IPO) process. As of 10:15 AM, the KOSPI stood at 5,699, up 4.21% from the previous day.

Lean Right

The KOSPI index opened with a surge of over 3% on the 27th. This is attributed to the broad rise in major indices on the New York stock market the previous day, driven by a rebound in large tech stocks and expectations for corporate earnings. The KOSPI opened at 5,658.65, up 189.18 points (3.46%) from the previous trading day. After opening higher than the previous close, the index is widening its gains amid strong buying by foreign investors.

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·Seoul, Korea (the Republic of)
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South Korea’s KOSPI index rose 4.53 percent to 5,717.30 on Tuesday; Korea Exchange halted programmed buying for five minutes for the second time in six days. SK Hynix and Samsung reported earnings...

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Asian stock markets rose, led by South Korea. Wall Street also rose, boosted by technology stocks ahead of earnings reports.

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연합뉴스-Yonhap News Agency broke the news in Seoul, Korea (the Republic of) on Tuesday, October 27, 2026.
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