SK Hynix Shares Plunge Over 10% in Seoul After Nasdaq Debut Profit-Taking

SEOUL — SK Hynix Inc. shares tumbled more than 10 percent on the Korean exchange Sunday, erasing gains from a strong debut of its American Depositary Receipts (ADRs) on the U.S. National Association of Securities Dealers Automated Quotations (Nasdaq) the previous day.

The sharp decline in Seoul followed a wave of profit-taking by investors who had bought into the memory chipmaker ahead of or during Friday's high-profile listing in New York. The sell-off highlighted significant valuation discrepancies between the company's listings on U.S. and Korean markets, prompting traders to lock in returns as prices adjusted.

SK Hynix, a global leader in dynamic random access memory (DRAM) chips that are critical for artificial intelligence applications, saw its ADRs close higher than their opening price on Friday after trading at a premium relative to the domestic stock. However, by Sunday morning in South Korea, sentiment had shifted as market participants weighed the potential dilution from additional share issuances against current valuations.

Analysts noted that while the Nasdaq debut demonstrated strong international demand for SK Hynix's technology portfolio, the immediate reaction in Seoul reflected a cautious approach to long-term holding strategies. The price gap between the two markets created an arbitrage opportunity that many investors exploited quickly before the domestic market opened on Sunday.

The company has not yet issued a formal statement regarding the volatility or its future capital allocation plans beyond previously disclosed guidance. Market observers are watching closely to see if the shares will stabilize in coming sessions as trading volume normalizes following the initial listing frenzy.

Questions remain regarding how long the valuation gap between the U.S. and Korean listings will persist and whether SK Hynix management intends to address the disparity through further corporate actions or strategic communications. The semiconductor sector remains a key driver of South Korea's economic outlook, making any significant movement in its largest chipmaker closely monitored by regional investors.

Trading volumes on the Seoul exchange were elevated during the early hours as institutional and retail traders reacted to overnight developments in New York. The drop marks one of the steepest single-day declines for SK Hynix in recent months, underscoring the sensitivity of investor sentiment to cross-market pricing dynamics.

As markets close Sunday across Asia, attention turns to Monday's trading session on Wall Street and whether U.S.-listed shares will hold their gains or follow Seoul downward. The interplay between domestic expectations and international valuation metrics continues to define the short-term trajectory for SK Hynix stock.