KOSPI Surges Over 4% to Top 8,400 in Early Trading... KOSDAQ Turns Lower

Samsung Electronics Returns to "3 Million Won per Share", SK hynix Maintains "2 Million Won Mark"
Buy-Side Sidecar Triggered as KOSPI Surges

The KOSPI surpassed the 8,400 mark in early trading. The KOSDAQ opened higher but quickly turned downward.

On May 27, 2026, when the KOSPI index surpassed 8400 points intraday, triggering a buy-sidecar, the current status of the domestic stock market was displayed on the electronic board in the dealing room of the Hana Bank headquarters in Jung-gu, Seoul. Photo by Kang Jinhyung

As of 9:12 a.m. on May 27, the KOSPI index stood at 8,424.34, up 376.8 points (4.68%) from the previous trading day.

The KOSPI saw a sharp surge early in the session, triggering a buy-side sidecar (temporary suspension of program buy orders). The KOSPI sidecar is activated when the KOSPI 200 futures price rises by 5% or more from the base price and stays at that level for one minute, suspending the effectiveness of program buy orders for five minutes.

By investor type, foreigners and institutions showed strong net buying. Foreign investors recorded a net purchase of 109.7 billion won, while institutions net bought 179.8 billion won. Retail investors posted a net sale of 236.3 billion won.

The upward trend in the KOSPI is being led by certain sectors. By sector, electrical and electronics (+7.13%), manufacturing (+5.31%), insurance (+3.01%), and financial (+2.53%) are gaining. Construction (-3.16%), medical precision equipment (-2.62%), general services (-1.84%), and paper and lumber (-1.67%) are declining.

Among the top 20 companies by market capitalization, more stocks rose than fell. SK Square (+11.18%), SK hynix (+10.28%), Samsung Electro-Mechanics (+7.89%), and Samsung Electronics (+6.86%) advanced. Samsung Electronics returned to the "3 million won per share" level, while SK hynix maintained the "2 million won per share" mark. In contrast, Celltrion (-1.33%), LG Energy Solution (-0.88%), Hyundai Motor (-0.87%), and Samsung Biologics (-0.56%) saw their stock prices decline.

On the 27th, as the KOSPI index surpassed 8400 points during the session, triggering a buy-side car, the status of the domestic stock market was displayed on the electronic board in the dealing room of Hana Bank headquarters in Jung-gu, Seoul. 2026.5.27 Photo by Kang Jinhyung

On the same day, the KOSDAQ index recorded 1,148.17, down 24.35 points (2.08%) from the previous trading day. The KOSDAQ had opened at 1,173.80, up 1.28 points (0.11%) from the previous day, but quickly turned lower.

By investor type, foreigners and institutions showed strong net selling. Foreign investors net sold 37.9 billion won, while institutions net sold 115.2 billion won. Retail investors net bought 134.9 billion won.

All sectors posted declines. Medical precision equipment (-3.02%), machinery and equipment (-2.45%), construction (-2.35%), and IT services (-2.32%) fell.

Among the top 20 companies by market capitalization, most stocks declined. LIG Nex1 (-4.69%), Wonik IPS (-3.20%), Kolon TissueGene (-3.12%), and Sam Chun Dang Pharm (-3.03%) fell. Only Padu (+7.28%), Alteogen (+0.82%), Ecopro BM (+0.23%), and Ecopro (+0.07%) recorded gains.

Meanwhile, the KRW/USD exchange rate opened at 1,506.7 won in the Seoul foreign exchange market, up 2.4 won from the previous trading day.

This content was produced with the assistance of AI translation services.