Samsung, SK Hynix Swings Made South Korea’s Stock Market the Most Volatile Among Major Markets
South Korea's stock market volatility tripled to 4.1% in 2023, the highest among major markets, driven by Samsung and SK Hynix, which accounted for 99% of gains and 69.3% of declines. The Bank of Korea attributed this to heavy reliance on semiconductor stocks and increased leveraged ETF investments. The central bank will continue monitoring the situation.
How this was made

The 30-second read
Why it matters
The data signals heightened risk for investors in Korean equities, especially semiconductor heavyweights.
Market read
Korean market volatility tops global peers, driven by semiconductor giants.
What to watch
Potential policy measures by BOK to curb leveraged ETF exposure may moderate future swings.
Background
BOK's monetary and credit policy report highlighted a 4.1% volatility rate, triple the prior year.
Ticker impact
Samsung Electronics accounted for 99% of the Kospi's rise and 69.3% of its decline, driving market volatility.
Potential for increased intraday volatility in Samsung and related semiconductor stocks.
Central bank data links Samsung's price moves directly to market volatility metrics.
SK Hynix contributed similarly to Kospi moves, making up 99% of gains and 69.3% of losses.
Expect amplified price swings for SK Hynix and peers in the semiconductor sector.
BOK report ties SK Hynix performance directly to overall market volatility.
Market effects
Korean semiconductor sector faces heightened volatility risk.
South Korean market shows highest volatility among major indices.
Increased Korean volatility may affect global tech supply‑chain sentiment.
Counterpoint
Volatility could present short‑term trading opportunities despite broader risk.
Key entities
- RegulatorBank of Korea
Issued the volatility report.
- CompanySamsung Electronics
Dominant driver of Kospi moves.
- CompanySK Hynix
Key contributor to market swings.


