Korea Exchange Activates KOSDAQ Sidecar After Futures Drop 6%, Halting Programme Trading for Five Minutes

Newsquawk · 2026-08-21

The Korea Exchange triggered a sidecar on the KOSDAQ market after KOSDAQ 150 futures dropped by 6 percent, resulting in a five-minute suspension of programme trading orders. This mechanism differs from a full market circuit breaker, typically activating during rapid, flow-driven selloffs. Because algorithmic and arbitrage strategies heavily drive programme transactions in South Korea, such halts can temporarily interrupt volatility within the thin KOSDAQ liquidity structure. Market participants must now evaluate whether this event stems from small-cap specific dynamics or broader macro risk aversion. Observers will closely monitor foreign investor flows, currency movements, and whether selling pressure persists once programme trading resumes, as these factors will dictate the market trajectory toward the close and into the subsequent session.

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The Korea Exchange triggered a sidecar on the KOSDAQ market after KOSDAQ 150 futures plunged 6%, suspending program trading quotes for 5 minutes. This measure is the result of program sell orders amplifying the downturn, characteristic of the KOSDAQ market's thin liquidity and high retail participation. Investors should closely monitor potential additional selling pressure after the resumption of program trading, as well as exchange rate and foreign supply-demand trends.

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KOSDAQ Stock Market — A sidecar was triggered due to a 6% plunge in KOSDAQ 150 futures, temporarily halting program trading, and further downward pressure is feared due to vulnerable liquidity and excessive volatility.

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