SK Hynix just pulled off the biggest US stock listing in tech history. One day later, its Korea-listed shares crashed harder than ever before.
The contradiction is stark. The company raised more money than Alibaba did. The domestic stock lost 15.4% in a single session.
The sell-off hit SK Hynix shares on Monday, one day after its US depositary receipts began trading. Depositary receipts are certificates that let foreign companies sell shares on US exchanges. SK Hynix's US receipts opened at $170, well above the reference price of $149, and ended their debut session up 12.8% on Friday.
Back in Seoul, the party ended fast. Traders rushed to lock in profits after a months-long rally that had pushed SK Hynix's Korea-listed stock nearly doubled this year. The high-profile US listing gave them a clear exit signal.
The decline also spread to rivals. Samsung Electronics, another South Korean memory chip maker, lost over 10%. Japanese memory chip company Kioxia slumped nearly 13%.
The SK Hynix plunge did not happen in a vacuum. Asian markets pulled back as investors worried about escalating Middle East conflicts and a growing fear that the artificial-intelligence rally had run ahead of business reality.
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The Korea Composite Stock Price Index (Kospi) fell nearly 9% by the close. Circuit breakers - automatic trading halts triggered by steep drops - kicked in for the seventh time this year on the Kospi.
US chip stocks also took a hit. AMD and Intel each fell 5% when trading began, while Nvidia slipped 1.5%.
The tech-heavy Nasdaq declined 0.9% as of just after the US market open, while the broader S&P 500 slipped 0.3%. Only the Dow Jones Industrial Average managed a small gain, opening 0.1% higher.
Japan's Nikkei 225 index fell about 2%. The sell-off felt like a coordinated reset.
The biggest question now is the gap between SK Hynix's two stock listings. US depositary receipts trade at roughly a 37% premium to the Korea-listed shares. That kind of spread is unusual.
Tiger Brokers market strategist James Ooi explained why. "Companies with both US and home-market listings often trade at a premium in the US, benefiting from broader investor access, deeper liquidity and stronger valuation support, as seen with TSMC," Ooi wrote on Monday.
Morningstar, an investment research firm, placed a fair value of $160 on the US depositary receipts and 2.4 million won on the Korea-listed shares. Analyst Lorraine Tan noted, "The current memory upcycle is tracking substantially stronger than expected, but our base case continues to assume normalization in cycle dynamics, limiting upside at current levels."
In plain words: business is good, but not good enough to justify today's prices.
The large valuation premium between SK Hynix's US and Korea shares will attract attention. If US holders decide to cash out, the gap could narrow quickly. Analysts remain broadly positive, but the stock looks fairly valued near current levels. A record drop does not mean the story is over - it means the easy gains are gone.
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