South Korea's benchmark stock index, the KOSPI, surged 4.97% to 6,661.22 on August 12, 2026, triggering a buy-side "sidecar" trading curb to stabilize the market.
The powerful intraday rally was driven entirely by a massive rebound in major semiconductor and technology heavyweight stocks.
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✍🏼The Trigger Condition: The Korea Exchange (KRX) activated the sidecar mechanism at 11:57 a.m. local time after the benchmark KOSPI 200 Futures index jumped more than 5% (specifically 5.13%) and held that position for at least one minute.
✍🏼The Cooling Mechanism: The sidecar automatically suspended all program-buy orders for five minutes to cool institutional trading velocity and allow the market to absorb the rapid price movement.
✍🏼Market Context: This event marks the 23rd buy-side sidecar issued on the KOSPI in 2026 alone, highlighting a year characterized by structural, tech-driven volatility.
#KOSPIRisesNearly5%TriggersBuySideSidecar
