data.go.kr daily public market files are shown with ECOS macro reference data. Price and index files update after the next trading day.
Compares the pair's reported KOSPI market-cap share with the KOSPI daily close over the same one-year window. The two top axes are independent, so vertical spacing between the lines is not a metric. The lower panel shows the pair's actual adjusted-price performance versus KOSPI.
20-session relative return of the market-cap-weighted Samsung Electronics + SK hynix adjusted-price basket versus KOSPI. Positive means the basket outperformed; negative means it underperformed.
Market-cap dominance is Samsung Electronics and SK hynix's combined share of reported KOSPI listed market capitalization. It is shown directly as a percentage.
KOSPI daily close: 4,004.42 on 2025-11-05 to 5,383.8 on 2026-11-05.
Sources: data.go.kr reported daily KOSPI close and market capitalization · KIS quote snapshots for the separately marked estimate · KIS adjusted completed-session prices for the price-leadership panel · calculated by Korean Tickers. For each price session, the basket uses the latest available reported market-cap weights dated before that session. Samsung Electronics market capitalization includes its non-semiconductor businesses.