The South Korean KOSPI index staged a notable recovery on Wednesday, bouncing back from a sharp decline in the previous session that saw the market plunge almost 10%. The benchmark index closed 267.18 points, or 3.26%, higher at 8,471.02, driven largely by significant gains in heavyweight technology stocks.
Chipmaking giant Samsung Electronics Co. spearheaded the KOSPI tech rebound, with its shares surging by 9.84%. Fellow semiconductor firm SK Hynix Inc. also advanced, climbing 0.98%, contributing to the market's overall positive movement.
This recovery comes a day after the KOSPI index experienced its steepest single-day decline since March 4, plummeting 910.71 points, or 9.99%, to close at 8,203.84. The severity of Tuesday's sell-off was such that it triggered an automatic 20-minute trading halt across the exchange, a measure designed to curb excessive volatility.
The previous downturn was primarily attributed to heavy selling by overseas investors, particularly in the semiconductor sector. Regulatory signals suggesting concerns about an overheated tech rally also played a role. Lee Chan-jin, head of South Korea's market watchdog, indicated that authorities might have been too quick in approving leveraged funds linked to leading chip stocks, products introduced last month that are believed to have amplified market volatility.
The KOSPI index has become increasingly concentrated in the semiconductor industry, with Samsung Electronics and SK Hynix together accounting for more than half of its total market capitalization. This concentration, while driving growth during boom periods, also makes the index highly susceptible to sector-specific downturns and regulatory shifts.
Analysts caution that volatility may persist. VK Vijayakumar, Chief Investment Strategist at Geojit Investments, noted that excessive volatility would likely continue in semiconductor stocks and markets like South Korea and Taiwan. He explained that sharp rallies would trigger profit-taking, while steep corrections would encourage buying, creating a cycle of fluctuations despite strong underlying profitability for these companies. The high concentration risks remain a significant factor.