![[CAPTIONS]
The Kospi index and SK hynix's share price are displayed on a board at the dealing room of Hana Bank's headquarters in Jung-gu, Seoul, on the 10th, when the Kospi opened up more than 3%. Yonhap News - Seoul Economic Daily Finance News from South Korea](https://wimg.sedaily.com/news/cms/2026/07/10/rcv.YNA.20260710.PYH2026071003170001300_P1.jpg "KOSPI Jumps 5%, KOSDAQ 6% as Buy-Side Sidecars Triggered")
South Korean stocks surged on the 10th, triggering "buy-side sidecars" — temporary halts on program buy orders — on both the KOSPI and KOSDAQ markets in succession.
According to the Korea Exchange (KRX), a sharp rise in the KOSPI 200 futures index prompted a five-minute suspension of program buy orders on the main bourse starting at 12:54:55 p.m.
At the time of the trigger, the KOSPI 200 futures index stood at 1,240.15, up 60.60 points, or 5.13%, from the previous session's close.
A KOSPI buy-side sidecar is activated when the price of KOSPI 200 futures rises 5% or more above the reference price for one minute. Once triggered, program buy orders are suspended for five minutes.
A buy-side sidecar was subsequently triggered on the KOSDAQ market at 1:08:48 p.m.
At that time, the KOSDAQ 150 futures price stood at 1,487.40, up 84.80 points, or 6.04%, from the previous session's close. The KOSDAQ 150 spot index also rose 89.45 points, or 6.44%, to 1,476.37.
A KOSDAQ buy-side sidecar is triggered when the KOSDAQ 150 futures price rises 6% or more above the reference price and the KOSDAQ 150 index rises 3% or more above the previous session's close, with both conditions persisting simultaneously for one minute.
On the day, the KOSPI extended its gains in the 5% range and the KOSDAQ in the 6% range, continuing their strong rally.
