SK Hynix Shares Sink a Record 15% in Seoul After Nasdaq Triumph

SK Hynix’s shares sank 15.4% in Seoul on Monday, their worst single trading day on record, just three sessions after the chipmaker’s American depositary receipts jumped 13% in a blockbuster Nasdaq debut. Shares of the chip giant closed 15.4% lower on Monday, posting the largest fall in history, data from LSEG showed. The South Korean memory-chip maker had jumped 13% in its Wall Street debut on Friday, reflecting strong appetite from U.S. investors for AI-linked semiconductor stocks.

The listing that preceded the crash was itself a record. SK Hynix’s American depositary receipts raised $26.5 billion in what ranks as the largest U.S. share sale ever completed by a foreign company. The offering surpasses the $25 billion Alibaba raised in its 2014 U.S. market entry.

A Record Debut Turns Into Seoul’s Worst Trading Day

South Korea’s AI-fueled stock rally came under renewed pressure Monday as SK Hynix Inc. tumbled by a record 15%, underscoring growing investor concerns that the boom has become overstretched. Traders pointed to fears of lower-than-expected earnings and a rotation into the company’s newly listed American depositary receipts, which surged 13% in their debut on Friday. The decline reflects a mix of profit-taking and uncertainty over how the U.S.-listed shares should be valued relative to the Korean stock, with analysts saying the ADR debut has effectively created a new benchmark for investors to assess the company’s valuation. Despite posting the second-largest U.S. listing on record, investors headed for the exits in Korea as a second quarter estimate projected the chipmaker to miss the market consensus.

SK Hynix shares fell more than 15% in trading on Monday, its biggest one-day decline on record, as investors in Seoul cashed out of a scorching share price rally following its Nasdaq debut last week. SK hynix shares closed down 15.37 percent at 1.85 million won ($1,230) in Seoul on Monday. The company’s U.S.-listed shares dropped 9.2% to $152.50 in premarket trading on Monday after jumping more than 12% in its Nasdaq debut on Friday.

Same Stock, Two Very Different Prices

Priced at $149 apiece, the offering comprised 177.9 million ADRs, with every ten ADRs corresponding to a single underlying common share. That ratio means the Nasdaq price and the Seoul price are two readings of the same equity, and Monday showed how far apart those readings can drift. Taiwan Semiconductor Manufacturing Co.’s U.S.-listed ADRs trade at a roughly 13% to 14% premium to its domestic shares, Yoo pointed out, adding that SK Hynix’s sharp move has created a discount rate of more than 20% between its U.S. and Korean listings. “Companies with both U.S. and home-market listings often trade at a premium in the U.S., benefiting from broader investor access, deeper liquidity and stronger valuation support,” said James Ooi, a market strategist at Tiger Brokers in Singapore. Arbitrage is limited by hurdles in converting Korean shares to ADRs, he added.

After the rout in the Seoul market on Monday, SK Hynix’s U.S. ADRs, which represent one-tenth of a share and closed at $168 on Friday, were left trading at about a 37% premium to its South Korean share price. That gap gave arbitrage traders plenty to argue over, and no two of them priced the stock the same way.

SK Hynix led the market for high-bandwidth memory chips with a 58% revenue share in the first quarter, whereas Samsung and U.S. competitor Micron Technology each held 21%, Counterpoint Research data showed. HBM chips are primarily used in artificial intelligence systems for customers such as Nvidia and Alphabet’s Google. Jupiter Asset Management’s Sam Konrad, who manages Asia equity income for the firm, told Reuters that the new listing may ultimately drive a valuation rerating for SK Hynix’s Seoul-traded shares, which have historically carried a price-to-earnings ratio below Micron’s despite what he sees as comparable or superior fundamentals. Analysts have noted the Nasdaq debut could help close the valuation gap between SK Hynix and its U.S. peer Micron Technology.

Everybody’s Confused About the Fair Price

Not every trader in Seoul agreed on why the stock cratered. Two listings, in two currencies, on two exchanges, left no shared answer for which price reflected reality.

Everybody’s really confused about what’s going to happen to the memory demand and where the fair price is.

Daniel Yoo, global strategist at Yuanta Securities, made the comment on “Squawk Box Asia.” Yoo said the sell-off was also driven by the mechanics of the offering, calling it “additional share issuance” that increased the supply of stock available to investors. “The market is taking this as a correctional period for SK Hynix domestically,” he said. The pullback was likely to prove temporary as structural AI demand continues to outpace supply, he said, adding that shares will likely move “in the right direction” over the next six to 12 months despite near-term volatility. Ryu Young-ho, a senior analyst at NH Investment & Securities, said investors were profit-taking after the conclusion of the U.S. offering.

How Big This Listing Actually Was

Before Monday’s reversal, the Nasdaq arrival had been billed as a watershed for foreign listings in the United States. Investor appetite proved especially strong, with orders reportedly covering seven times the number of shares on offer before the deal was priced. Only SpaceX’s $75 billion IPO was larger among all U.S. equity offerings, meaning the SK Hynix deal slots in at number two all-time, according to The Wall Street Journal.

• $26.5 billion raised: SK Hynix listed its American depositary receipts on the Nasdaq, raising $26.5 billion in what ranks as the largest U.S. share sale ever completed by a foreign company.
• 177.9 million ADRs priced at $149 each, with every ten ADRs equal to one common share.
• Orders covering seven times the shares on offer before the deal priced.
• About $5 billion in ADRs went to three cornerstone investors: Baillie Gifford, Coatue Management, and Situational Awareness Partners, per Bloomberg.

According to Bloomberg, total orders reached approximately $200 billion. Nearly half of the allocated shares were distributed to the 10 largest institutional investor accounts. Bank of America, Citigroup, Goldman Sachs and JPMorgan served as the lead underwriters. The Friday listing ranked as the second-largest U.S. listing on record after Elon Musk’s SpaceX.

The Ceremony in Times Square

SK hynix held an “Opening Bell” ceremony on the morning of July 10 at the Nasdaq MarketSite in Times Square, New York, officially marking the commencement of trading. The company published its own account of the Times Square ceremony, naming SK Group Chairman Chey Tae-won and Executive Vice Chairman Chey Jae-won among those in attendance. “Through continuous innovation, we will push the boundaries of what memory can achieve while empowering our employees to reach even greater accomplishments,” SK hynix CEO Kwak Noh-Jung said. He added, “SK hynix seeks to be wherever AI is, continually demonstrating our technology leadership.”

Proceeds from the offering will fund the purchase of extreme ultraviolet lithography machines and the construction of new production facilities, according to the company’s filings. The ADR offering is scheduled to close on July 14. The newly issued common shares underlying the ADRs will be additionally listed on the KOSPI Market of the Korea Exchange on July 29.

Collateral Damage in a Leveraged Trade

Korea’s benchmark index plunged 8.95 percent Monday, triggering both a sidecar and a circuit breaker, as Samsung Electronics and SK hynix led the rout. The declines in SK Hynix’s shares, alongside those of rival chipmaker Samsung Electronics, contributed to a 9% plunge in South Korea’s Kospi, triggering a 20-minute trading halt. Korean stocks extended losses after trading resumed after President Lee Jae Myung reiterated that the government would help speed up projects to build chip fabs in investments worth hundreds of billions of dollars, as outlined by Samsung and SK Hynix.

The selloff was largely led by foreign and institutional investors, who offloaded 1.41 trillion won and 1.47 trillion won, respectively, according to the Korea Exchange. Retail investors, who had been the backbone of the latest rally, were increasingly shifting attention to the chipmaker’s U.S.-listed shares, according to reporting from the Korea JoongAng Daily.

In Hong Kong, a single-stock ETF tracking SK Hynix offered by fund manager CSOP, which uses leverage to target twice the daily returns of its shares, lost more than a third of its value on Monday, its biggest one-day decline since listing in October. “It’s common on the first trading day for investors to rotate out of the Korea-listed shares and into the U.S.-listed ADR, making the selloff largely a flow-driven move,” said Hwang San-hae, a market analyst.

Why the Bulls Aren’t Backing Away

Not everyone reading Monday’s chart saw a warning sign. Some strategists framed it as ordinary portfolio mechanics rather than a verdict on artificial intelligence demand.

It doesn’t really speak to any sort of reduction in the excitement about AI hardware.

Phillip Wool, chief research officer at Rayliant Global Advisors, offered a different read on the same slide in Asian chip stocks. He downplayed the recent weakness in Asian AI hardware names, describing it as a portfolio rebalancing exercise rather than a deterioration in the industry’s outlook, noting that many investors had accumulated outsized positions in South Korean and Taiwanese AI chipmakers after their strong gains. Wool said the AI investment was broadening beyond semiconductors, but that should continue to benefit memory suppliers such as SK Hynix.

The company’s own memory supercycle outlook forecasting surging HBM demand leans on similar arguments, and Gartner’s forecast for HBM revenue through 2027 backs the bull case with hard numbers. According to Gartner, HBM revenues are forecast to increase from US$31 billion in 2025 to US$69 billion in 2027, representing a CAGR of 49.5%. BofA named SK hynix the global memory industry’s “Top Pick,” predicting it will be one of the primary beneficiaries of this supercycle. Yoo’s own read on the timeline was blunt: shares should move “in the right direction” over the next six to 12 months despite near-term volatility, in his words, even if Monday’s plunge stings first. Readers who want the fuller backstory on how the $29 billion IPO filing first flagged the memory crunch can find it in Budgy App’s earlier coverage of the offering.

Frequently Asked Questions

What is SK Hynix’s new Nasdaq ticker symbol?

Trading on Friday used the provisional ticker SKHYV, with the permanent designation SKHY taking effect when trading resumed Monday.

Why did SK Hynix’s Seoul-listed shares fall so sharply on Monday?

Traders pointed to fears of lower-than-expected earnings and a rotation into the company’s newly listed American depositary receipts, which had surged 13% in their Friday debut. Analysts also said the ADR debut effectively created a new benchmark for investors to assess the company’s valuation, adding to the confusion over price.

How much did SK Hynix raise in its Nasdaq listing?

SK Hynix raised $26.5 billion in what ranks as the largest U.S. share sale ever completed by a foreign company.

How large was the gap between SK Hynix’s Nasdaq and Seoul share prices?

After Monday’s rout in Seoul, SK Hynix’s U.S. ADRs, which closed at $168 on Friday, were left trading at about a 37% premium to its South Korean share price.

What do analysts expect for SK Hynix stock going forward?

Yuanta Securities’ Daniel Yoo said the pullback was likely to prove temporary as structural AI demand continues to outpace supply, expecting shares to move “in the right direction” over the next six to 12 months despite near-term volatility. Rayliant Global Advisors’ Phillip Wool said AI investment was broadening beyond semiconductors in a way that should keep benefiting memory suppliers such as SK Hynix.

Disclaimer: This article is for informational purposes only and does not constitute investment advice. Stock prices, ADR premiums and analyst forecasts discussed here involve significant risk and can change quickly. Readers should consult a qualified financial professional before making investment decisions. Figures are accurate as of the date of publication.