Although the benchmark Kospi surged more than 28 percent in May, most stocks actually declined during the month, signaling growing market polarization as buying activity concentrated in a small number of AI-driven large-cap stocks.

Shares rebounded to a fresh all-time high on Friday, driven by strong gains in AI-related shares and renewed optimism about a potential cease-fire in Iran.

Although the benchmark Kospi surged more than 28 percent in May, most stocks actually declined during the month, signaling growing market polarization as buying activity…

Korea's benchmark KOSPI recovered from steep intraday losses Tuesday as retail and institutional investors stepped in to offset heavy foreign selli...