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KRX triggers sidecar on KOSPI volatility, halting program trades for five minutes

KRX triggers sidecar on KOSPI volatility, halting program trades for five minutes

The Korea Exchange paused program buy orders for five minutes after Kospi 200 futures rose more than 5%, with reports citing triggers on July 21 and again around 9:06 a.m. on July 22.

Fact Check
The primary source, Korea Economic Daily (Hankyung), directly confirms every specific detail: a buy-side sidecar was activated on the KOSPI cash market for exactly 5 minutes from 12:41:29 p.m. on July 21, 2026, triggered by the KOSPI 200 futures index rising 5.17% (53.44 points) to 1086.58. The bloomingbit feed independently reproduces the same figures, and BlockBeats confirms the sidecar halts only program trading while manual/cash trading continues, matching the claim's assertion that cash trading in the broader market continued.
Summary

The Korea Exchange triggered a buy-side sidecar to temporarily suspend program buy orders on the KOSPI market for five minutes after sharp gains in Kospi 200 futures exceeded the exchange’s volatility threshold. One report said the halt began at 12:41:29 p.m. on July 21 when the futures index reached 1,086.58, up 53.44 points, or 5.17%, from the previous close. A later report said another buy sidecar was activated at about 9:06 a.m. on July 22 after Kospi 200 futures held gains of more than 5% for over one minute, reaching 1,139.30, up 5.4% from a reference price of 1,080.84. A sidecar pauses automated basket orders rather than closing the broader market.

Terms & Concepts
  • sidecar: A market safeguard that temporarily pauses certain program trades when volatility breaches a threshold.
  • program buy orders: Automated basket purchase orders executed through trading systems rather than manual orders.
  • Kospi 200 futures: Futures contracts tied to the Kospi 200 index and used to gauge expected moves in South Korean equities.