The Korea Exchange has activated a buy-side circuit breaker on the KOSPI index, halting trading as the benchmark rallied sharply from recent lows.
The measure was triggered after the index surged 4.1% in a single session, marking a significant extension of the broader market rally.
The KOSPI had plunged nearly 10% in late June, triggering multiple circuit breakers as tech shares faced heavy selling pressure.
This is the second time in less than a week that the exchange has intervened to pause trading, following a sell-side circuit breaker triggered by a steep decline earlier in the month.
The sharp advance was fueled by robust buying interest across the technology sector, which has emerged as a key driver of the rebound.
Investors appear to be rotating back into risk assets after the aggressive profit-taking that accelerated a broader reversal across Asian equity markets.
The KOSPI had plunged nearly 10% in late June, triggering multiple circuit breakers as tech shares faced heavy selling pressure.
This rapid swing highlights the fragility of sentiment in South Korean equities, which have been caught between global tech volatility and domestic liquidity concerns.
The buy-side halt is designed to prevent excessive speculation and ensure orderly trading during periods of extreme volatility.