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KOSPI Surges Nearly 5% Past 5,700, Triggering Sidecar Mechanism to Suspend Buying for 5 Minutes

TradingKey

AuthorBlock Tao

Oct 27, 2026 1:53 AM

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On October 27, the South Korean KOSPI index surged nearly 5%, breaking through the 5,700-point mark following a rare V-shaped rebound. Amid extreme buying fever and intense futures volatility, the Korea Exchange urgently triggered a buy-side Sidecar mechanism, suspending program buy orders for 5 minutes. This rally was driven by global institutional short-covering, rising risk appetite ahead of US tech earnings, SK Hynix’s 16 trillion won special dividend, a stabilizing won, and exhausted selling pressure.

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TradingKey - KOSPI Index surges nearly 5%, extreme buying fever prompts Korea Exchange to urgently trigger Sidecar mechanism to suspend program buying.

In early trading on October 27, the South Korean stock market staged an extremely rare V-shaped rebound after experiencing severe volatility and deleveraging shakeouts last week. The South Korean benchmark index, KOSPI, surged over 4% in early trading, forcefully breaking through the 5,700-point mark. Currently, KOSPI's gains have expanded to nearly 5%, reaching 5,736.65 points.

kospi-79ace79766e94ac2b6a6250004da6723 KOSPI Index chart, source: TradingView

As an instantaneous influx of program buying caused severe volatility in the futures market, the Korea Exchange officially activated the buy-side Sidecar protection mechanism in the morning, urgently suspending the execution of KOSPI program buy orders for 5 minutes to cool down market overheating.

This activation of the buy-side suspension mechanism indicates that global institutional investors and quantitative funds are covering short positions and actively rebuilding positions in Korean heavyweight stocks with high leverage efficiency and speed. The driving forces behind this are the recovery of global risk appetite ahead of the US stock market's "tech earnings week," the positive impact of heavyweight stock SK Hynix's 16 trillion won special dividend, as well as the Korean won halting its slide and selling pressure reaching exhaustion.

This content was translated using AI and reviewed for clarity. It is for informational purposes only.

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Disclaimer: The content of this article solely represents the author's personal opinions and does not reflect the official stance of Tradingkey. It should not be considered as investment advice. The article is intended for reference purposes only, and readers should not base any investment decisions solely on its content. Tradingkey bears no responsibility for any trading outcomes resulting from reliance on this article. Furthermore, Tradingkey cannot guarantee the accuracy of the article's content. Before making any investment decisions, it is advisable to consult an independent financial advisor to fully understand the associated risks.

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