KOSPI Surges 3.29%…SK hynix Gains 8.24%

The KOSPI closed at 5,735.66 on the 21st, up 3.29% from the previous trading day. The KOSDAQ recorded an average change rate of 0.89%, with advancing stocks outnumbering declining stocks, while SK hynix and Samsung Electronics emerged as leading stocks among those with the highest trading values.

Market at a Glance

On the KOSPI, 888 stocks traded, with 429 advancers, 415 decliners, and 44 unchanged. Trading value was approximately 27.162 trillion won, and trading volume was 277.50 million shares. By investor type, foreign investors, institutions, and other investors were net buyers, while individuals were net sellers.

On the KOSDAQ, among 1,715 stocks, 988 advanced, 645 declined, and 82 were unchanged, with advancing stocks prevailing. The average change rate was 0.89%, trading value was approximately 6.4143 trillion won, and trading volume was 606.66 million shares. By investor type, individuals, institutions, and other investors were net buyers, while foreign investors were net sellers.

Korea market daily snapshot for 20261021

Leading Market Stocks

SK hynix, a leading stock by trading value, closed at 1,288,000 won, up 8.24%. Trading volume was 6,093,892 shares, trading value was approximately 785.64 billion won, and its change rate over the most recent five trading days was -9.61%. A related disclosure was “Corporate Briefing (IR) Held (Notice).”

Samsung Electronics rose 7.18% to 224,000 won. Trading volume was 30,271,570 shares, trading value was approximately 672.73 billion won, and its change rate over the most recent five trading days was -4.48%. Recent disclosures included “Report on the Ownership Status of Specific Securities by Executives and Major Shareholders” and “Report on Large-Scale Holdings of Stocks, etc. (General).”

Stocks in Focus

HT Robotics closed at 11,410 won, up 16.79%. Trading volume was 31,520,840 shares, or 3.31 times the 20-day average, and its change rate over the most recent five trading days was 66.08%. A related disclosure was “Report on the Ownership Status of Specific Securities by Executives and Major Shareholders.”

Myungsin Industry rose 19.62% to 10,060 won. Trading volume was 19,228,933 shares, or 11.14 times the 20-day average, and its change rate over the most recent five trading days was 16.30%. Trading value was approximately 185.5 billion won.

LIG Defense & Aerospace closed at 496,000 won, down 8.49%. Trading volume was 869,136 shares, or 5.84 times the 20-day average, and its change rate over the most recent five trading days was -14.04%. Trading value was approximately 420.5 billion won.

Key Disclosures

Among the selected stocks based on the most recent 7 trading days, Samsung Electronics’ “Report on the Ownership Status of Specific Securities by Executives and Major Shareholders” and “Report on Large-Scale Holdings of Stocks, etc. (General),” as well as HT Robotics’ “Report on the Ownership Status of Specific Securities by Executives and Major Shareholders,” were identified. Myungsin Industry submitted “Consent to the Listing of Subsidiaries, etc.” and “[Correction] Corporate Briefing (IR) Held (Notice).”

  • 명신산업 · 종속회사등상장에관한찬성여부 (009900) — View DART filing
  • 삼성전자 · 임원ㆍ주요주주특정증권등소유상황보고서 (005930) — View DART filing
  • HT로보틱스 · 임원ㆍ주요주주특정증권등소유상황보고서 (396300) — View DART filing
  • 삼성전자 · 주식등의대량보유상황보고서(일반) (005930) — View DART filing
  • 명신산업 · [기재정정]기업설명회(IR)개최(안내공시) (009900) — View DART filing

Next Trading Day Checkpoints

  • It is necessary to check whether the KOSPI’s upward trend continues and how the closing price changes.
  • It is necessary to observe how the distribution of advancing, declining, and unchanged stocks in the KOSPI and KOSDAQ changes.
  • It is necessary to check changes in market trading volume and trading value, particularly the trading volumes of leading stocks such as SK hynix and Samsung Electronics.
  • It is necessary to check whether additional disclosures are made by related stocks such as Samsung Electronics, HT Robotics, and Myungsin Industry.
This article was prepared solely on the basis of the price, trading, investor flow, and disclosure information included in the FACT JSON and is not intended as investment solicitation.

Recent reports on this topic

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 hynix2026-10-14KOSPI Falls 0.44% to 6,008.81… HMM and Samsung SDI Rise
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