KOSPI Plunges Over 6% to 7,500 Level... Sell Sidecar Triggered

Repeated Sharp Fluctuations Throughout the Week...
Sell Sidecar Triggered Twice in Two Trading Days
Samsung Electronics and SK hynix Plunge by 6% and 8%, Respectively

The KOSPI index plunged by more than 6% from the previous trading day, dropping to the 7,500-point level. The market has been extremely volatile throughout this week, with sharp fluctuations causing significant confusion.

The KOSPI index started the day with a decline for the 10th consecutive day, falling below 8,000 points again after just one day. Various indices are displayed on the status board at the dealing room of Hana Bank headquarters in Jung-gu, Seoul. 2026.06.10 Photo by Dongju Yoon

As of 1:41 p.m. on June 10, the KOSPI index was trading at 7,585.60, down 511.33 points (6.32%) from the previous trading day. By investor type, foreign investors and institutions had net sold 3,482.122 billion won and 1,446.095 billion won, respectively, while individual investors had net purchased 4,722.126 billion won.

The KOSPI index is experiencing unprecedented volatility this week. On June 8, the index plunged more than 8% during intraday trading, triggering a circuit breaker at 9:03 a.m. and a temporary suspension of program sell orders (sell sidecar) at 9:34 a.m.

On the following day, June 9, a temporary suspension of program buy orders (buy sidecar) was triggered at 9:12:52 a.m. On June 10, a sell sidecar was triggered at 1:16:52 p.m. The sidecar is activated when the KOSPI 200 futures price rises or falls by more than 5% from the reference price and remains at that level for one minute, resulting in a five-minute suspension of program sell orders.

By sector, most are in decline. Electrical & Electronics (-7.47%), Insurance (-6.81%), Financials (-4.52%), Retail (-4.39%), and Machinery & Equipment (-3.87%) are all down, while only Construction (+1.75%) and Textiles & Apparel (+1.17%) are showing gains.

Among the top market cap stocks, most are also weak except for a few. Samsung Electronics (-6.9%), SK hynix (-8.5%), Samsung Life Insurance (-7.8%), Hyundai Motor Company (-7.5%), SK Square (-7.4%), Samsung Electro-Mechanics (-7.0%), and LG Energy Solution (-5.3%) saw significant declines compared to the previous trading day. Only a few stocks such as LS ELECTRIC (+4.5%), Hanwha Ocean (+4.2%), HD Korea Shipbuilding & Offshore Engineering (+2.0%), and HD Hyundai Heavy Industries (+1.9%) showed strength.

The KOSDAQ index was trading at 937.27, down 30.54 points (3.16%). Foreign investors had net sold 286.015 billion won, while individual investors and institutions had net purchased 277.185 billion won and 6.014 billion won, respectively.

By sector, all were in decline except for Publishing & Media Replication (+10.31%). Electrical & Electronics (-5.60%) saw the largest drop, followed by Financials (-4.22%), Medical & Precision Instruments (-3.61%), Chemicals (-3.28%), Manufacturing (-3.12%), and General Services (-2.57%).

Among the top KOSDAQ market cap stocks, the top three—Alteogen (-4.1%), EcoPro BM (-3.6%), and EcoPro (-3.6%)—all declined. In addition, Seojin System (-8.5%), HPSP (-8.0%), Robotis (-7.7%), LIG Nex1 (-6.8%), and Rainbow Robotics (-5.7%) were also weak. On the other hand, PSK Holdings (+12.8%), TES (+5.5%), Voronoi (+4.0%), Samchundang Pharm (+3.5%), and Jusung Engineering (+2.6%) showed gains.

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