Bullstory
Jun 5, 2026

Doosan Robotics 16% plunge, KOSPI sell-sidecar activated

The KOSPI 6month 5day 4% decline triggered a sell-sidecar. Semiconductor stocks remained weak during the same period, with Samsung Electronics and SK hynix opening down in the premarket by 4% and Doosan Robotics and Naver each falling sharply.

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![Doosan Robotics 16% plunge, KOSPI sell-sidecar activated/blog-images/gen-eb15371f-a190-4384-869f-5c16b6c66a30.jpg)

The KOSPI 6month 5day 4% decline triggered a sell-sidecar. As the sell-sidecar was activated that day, selling related to program trading was temporarily restricted. The market shock caused by the sharp index decline was reported to have intensified over a short period.

As U.S. semiconductor stocks weakened, Samsung Electronics and SK hynix opened down by 6month 4day in the premarket by 4%. Weakness in the premarket affected investor sentiment before the domestic market opened. The same trend carried through the overall session.

6month 4day, the Dow Jones recorded an all-time high. On the same day, Broadcom plunged. Broadcom's plunge negatively affected stock prices across the semiconductor sector.

Doosan Robotics fell by 6 month 5 day 16% . The stock has been classified by some as a Jensen Huang-related “Kkanbu stock.” The sharp drop that day significantly increased the stock’s volatility.

NAVER fell by 6 month 5 day 6% . In addition, some large IT and platform stocks also declined. The weakness centered on large-cap stocks was reported to have affected the market as a whole.

Investor attention was focused on the overlap between weakness in semiconductor stocks and sharp declines in robotics-related stocks. A common feature was that the volatility of related stocks increased during the trading day. Earnings and disclosure information to be released on the next trading day has been mentioned as a factor to watch.

Sources: 국내언론,파이낸셜뉴스 증권,연합뉴스 경제

Bullstory synthesized this report from the linked sources. AI may have assisted the writing process. Check the original reports for factual confirmation.