A sharp tech selloff exposed concentration risks in Asian markets, where chip giants such as TSMC, Samsung and SK Hynix dominate benchmarks. As their rapid gains pushed portfolio weights beyond risk limits, active fund managers were forced to sell despite strong fundamentals. The unwind triggered market volatility, accelerated fund outflows and intensified the shift from active to passive investing.

South Korean stocks are seeing a shift from optimism to caution as investors trim positions and add protection. While chip giants Samsung Electronics and SK Hynix powered a…

Margin balances soar along with chip champions Samsung Electronics and SK Hynix