KOSPI Plunges 3.52%… Samsung E&A and Vinatenc Rise by Double Digits

The KOSPI closed at 5,533.77, down 3.52% from the previous trading day, with 702 declining stocks far outnumbering the 162 advancing stocks. The KOSDAQ also showed a weak trend, with 1,284 declining stocks outnumbering the 369 advancing stocks.

Market at a Glance

KOSPI trading value was approximately KRW 21.5952 trillion, and trading volume was 253.85 million shares. Foreign investors and institutions were net sellers, while individuals and other investors were net buyers. The KOSDAQ recorded an average change of -2.07%, with trading value of approximately KRW 8.1008 trillion and trading volume of 578.27 million shares. In the KOSDAQ as well, foreign investors and institutions were net sellers, while individuals and other investors were net buyers. Of the 887 KOSPI-listed stocks, 162 advanced, 702 declined, and 23 were unchanged; of the 1,718 KOSDAQ-listed stocks, 369 advanced, 1,284 declined, and 65 were unchanged.

Korea market daily snapshot for 20261022

Market Leaders

SK hynix, one of the leading stocks by trading value, fell 4.19% to KRW 1,234,000. Its trading value was approximately KRW 5.1329 trillion, and trading volume was 4.13 million shares. Samsung Electronics fell 4.24% to KRW 214,500, with trading value of approximately KRW 4.4596 trillion and trading volume of 20.49 million shares. Samsung Electronics’ change over the latest five trading days was 3.37%.

Stocks in Focus

Samsung E&A rose 17.61% to KRW 56,100. Trading volume was 12.34 million shares, or 7.19 times the 20-day average, and its change over the latest five trading days was 32.94%. Vinatenc rose 14.68% to KRW 108,600, with trading volume of 1.17 million shares, or 3.78 times the 20-day average. Its change over the latest five trading days was 47.76%. Elice rose 18.02% to KRW 94,300, with trading volume of 9.72 million shares, or 2.59 times the 20-day average.

Key Disclosures

Samsung E&A filed disclosures related to operating results based on consolidated financial statements, a disclosure correcting a filing, a decision to retire shares, and a report on major matters (decision to acquire treasury shares). For Vinatenc, disclosures were identified regarding the conclusion of a single sales and supply contract and a report on major matters (decision to issue convertible bonds). Samsung Electronics filed a report on the ownership status of specific securities held by executives and major shareholders, as well as a general report on large holdings of shares and other securities.

  • 삼성E&A · 주식소각결정 (028050) — View DART filing
  • 삼성E&A · 주요사항보고서(자기주식취득결정) (028050) — View DART filing
  • 비나텍 · 주요사항보고서(전환사채권발행결정) (126340) — View DART filing

Next Trading Day Checkpoints

  • Check whether the KOSPI’s declining trend continues
  • Monitor changes in the distribution of advancing and declining stocks on the KOSPI and KOSDAQ
  • Check changes in trading volume for SK hynix and Samsung Electronics
  • Check whether Samsung E&A, Vinatenc, and Elice make additional disclosures
This article was prepared solely on the basis of the price, trading, investor-flow, and disclosure facts provided in the FACT JSON and does not include investment solicitation or forecasts.

Recent reports on this topic

2026-10-21KOSPI Surges 3.29%…SK hynix Gains 8.24%2026-10-20KOSPI plunges 3.73%…SK hynix and Samsung Electronics both decline2026-10-19KOSPI Closes 1.76% Higher…Samsung SDI Surges 11.49%2026-10-16KOSPI Closes Up 2.05%…Samsung Electronics Gains 4.58%, HT Robotics Surges2026-10-15KOSPI Plunges 7.57%…Trading Concentrated in Samsung Electronics and SK hynix
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