Kospi and Kosdaq Buy Sidecars Triggered as Samsung and SK Hynix Surge

South Korean financial markets surged during early trading on November 10, triggering simultaneous program-trading purchase halts on both the Kospi and Kosdaq indices, Munhwa Ilbo reported.

As of 11:00 a.m. KST, the Kospi rose 203.14 points (4.05%) to 5221.99, following a start at 5247.22—up 228.37 points (4.55%)—and reaching a intraday high of 5300.92.

The market rally prompted the Korea Exchange to issue a program-trading purchase halt, known as a buy sidecar, at 9:06 a.m. on the Kospi. Approximately four minutes later, at 9:10 a.m., a buy sidecar was also triggered on the Kosdaq market amid a morning surge of up to 5% across domestic equities driven by recovering investor sentiment in U.S. semiconductor stocks.

코스피·코스닥 급반등‥장 초반 '매수 사이드카' (2026.11.10/뉴스외전/MBC)

The domestic stock market advance was heavily influenced by overnight gains in the United States, where the Nasdaq index rose 2.74% and the S&P 500 climbed 2.35% on November 9. The Philadelphia Semiconductor Index jumped 6.85% as major U.S. chipmakers surged, including a 13.26% spike for AMD and a 6.25% gain for Micron.

Following the international semiconductor rebound, domestic market leaders Samsung Electronics and SK Hynix posted sharp increases. By 11:00 a.m., Samsung Electronics traded up 4.74% at 198,900 won, attempting to solidify a 200,000-won price level, while SK Hynix rose 5.81% to 1,202,000 won to reclaim the 1.2 million-won mark. Both major equities experienced 2 days of recovery following drops of 16% to 20% during the previous week.

[경제읽기] 코스피 매수 사이드카…젠슨 황 논란 일파만파 / 연합뉴스TV (YonhapnewsTV)

Samsung Electronics maintained the highest count of small shareholders among listed companies, climbing 54.5% from 5,160,210 at the end of 2024 to 7,971,242 in the first half of 2024. SK Hynix recorded the second-largest minor shareholder count, expanding 4.4-fold from 780,867 to 3,461,526 over the same period.

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