KIS index and stock quote snapshots are refreshed every 30 minutes with ECOS macro reference data. data.go.kr daily files remain the fallback and the basis for daily history.
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: 3,461.3 on 2025-09-18 to 6,894.23 on 2026-09-18.
KIS snapshot estimate: the current combined KIS market capitalization is divided by an estimated KOSPI total that scales the reported 2026-09-18 KOSPI capitalization by the KIS KOSPI index move from that anchor. It is refreshed every 30 minutes and is not a closing observation or a reported daily value.
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.