The KOSPI index in Seoul jumped more than 5% on Thursday, briefly reclaiming the 9,000-point level as investors rushed into semiconductor stocks.
The broad market rally was anchored by a wave of buying in the technology sector, lifting the benchmark to its highest level in months.
The surge followed Micron Technology's earnings report, which served as a catalyst for renewed optimism in the chip sector.
Traders interpreted the results as a positive signal for the broader semiconductor industry, prompting a swift repricing of South Korean tech names.
This sharp move highlights the continued sensitivity of Asian equity markets to global semiconductor performance.
With the KOSPI heavily weighted toward technology and chipmakers, developments at major US memory producers often dictate the direction of the Korean benchmark.