SK Hynix's $28 Billion U.S. Share Sale Was More Than Seven Times Oversubscribed Despite a Brutal Week for Chip Stocks

A Rough Week, a Packed Order Book

Since this outlet reported on July 8 that South Korea's Kospi entered bear market territory on Samsung and SK Hynix weakness, the slide in Korean chip stocks has continued. SK Hynix shares closed 5.7% lower on Wednesday in Seoul while Samsung Electronics fell 6.3%, according to Business Insider. The Kospi dropped another 5.4% on the session.

Yet on the same day those Seoul shares were getting hammered, underwriters working the U.S. listing closed their order books early, at 4 p.m. ET on July 8, with demand running more than seven times the available shares. Channel News Asia confirmed the oversubscription figure, citing a person familiar with the matter who declined to be identified because the details were confidential.

SK Hynix declined to comment on the figures.

What the Deal Actually Is

The offering covers 17.79 million new American Depositary Receipts on Nasdaq, with each ADR representing one-tenth of a common SK Hynix share, according to KuCoin. The total raise is $28 billion, making it the second-largest share sale in the world this year, trailing only SpaceX's $85.7 billion IPO, according to Channel News Asia.

Proceeds are earmarked for new factories and equipment to meet surging demand for AI chips. The primary product driving that demand is high-bandwidth memory, the specialized chip that sits adjacent to GPU processors in AI data centers and feeds them data at speeds standard memory cannot match. SK Hynix is Nvidia's leading HBM supplier, a position it built over 14 years of investment that drew skepticism before the AI boom validated the bet.

Pricing guidance was expected to come after the South Korean market closed Thursday, with allocations to be finalized later in the day in U.S. time, according to Channel News Asia.

Why Investors Piled In Anyway

The oversubscription is notable precisely because it came during what Business Insider described as a broader risk-off mood tied to U.S.-Iran tensions and Washington's decision to revoke a waiver on new Iranian oil sales. The Philadelphia Semiconductor Sector Index fell 5% on Tuesday alone, its sharpest single-day drop after what had been its best quarter ever.

SK Hynix shares have dropped by about a quarter in the last two weeks, yet remain up 680% over the past 12 months, according to Channel News Asia. The stock is still up over 200% this year, according to Business Insider. U.S. institutional investors appear to be looking past that near-term volatility.

KuCoin reported that the oversubscription signals those investors view the current HBM supply crunch as structural rather than cyclical, driven by AI workloads that are growing exponentially rather than by a one-time demand spike.

The Legitimate Bear Case

The bullish read on this deal deserves a fair counterpoint, because it is a real one. Charu Chanana, chief investment strategist at Saxo, wrote Wednesday that the listing "brings a large new block of AI-linked equity supply to market just as investors are questioning whether AI infrastructure stocks have run too far." She also flagged the core tension: the tight supply and strong pricing that make SK Hynix attractive today are the same conditions pulling in more capital and capacity, which could erode those margins over time.

Memory is a cyclical industry. The last major HBM cycle did not exist long enough to test that cyclicality against AI-specific demand, so there is genuine uncertainty about what normalization looks like or when it arrives.

The Strategic Logic Still Holds

Even so, Chanana acknowledged in the same note that "a US listing can broaden the investor base, improve liquidity and potentially narrow valuation gaps with US semiconductor peers." South Korean stocks have historically traded at a discount to comparable U.S. names. A Nasdaq-listed ADR removes a layer of friction for American funds that are mandated or incentivized to hold U.S.-listed securities.

SK Hynix's expanded access to U.S. capital could also accelerate its capacity expansion. KuCoin noted that faster capacity growth would have ripple effects across every company building AI infrastructure, since HBM shortages have been a bottleneck for AI processor deployment.

The Open Question

The final pricing and allocation, expected Thursday in U.S. time, will determine at what level those seven-times-oversubscribed orders actually clear. A deal priced at the top of guidance into a still-declining semiconductor tape would immediately test whether the institutional buyers who submitted orders hold, build, or quietly trim. That outcome is the first real data point on whether the oversubscription reflects durable conviction or calendar-driven FOMO from funds that needed AI exposure before quarter-end.