South Korea Stock Boom: Why Kospi Is World’s Most Volatile Benchmark Stock Index

South Korea's Kospi Index experienced volatility exceeding 60% in 2026, compared to approximately 30% for Japan's Nikkei 225 and lower levels for Bitcoin during the same period. The index generated significant returns for investors despite the price swings. The Kospi's volatility level ranked among the highest among major global stock indices.

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