South Korea’s stock market falls sharply after reaching record highs, with the KOSPI ending about 10% lower as investors sell technology and especially chip-related shares. Multiple reports describe renewed concern that the recent rally may be overstretched, prompting faster selling in heavyweight semiconductor companies such as Samsung Electronics and SK Hynix. The decline accelerates after trading disruptions, with one outlet citing a 20-minute suspension by the Korea Exchange that extends the losses. Other coverage points to broader risk appetite concerns tied to leveraged investment products, alongside worries about speculative positioning in parts of the market. Investors appear to be looking for further signals on the direction of global semiconductors, including attention to upcoming earnings from US chipmaker Micron, which is viewed as potentially influential for the sector. Overall, sources agree the downturn is led by technology sell pressure and comes soon after the index reaches new highs, reversing gains in a single session.