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The AI trade, for a brief moment this summer, looked like it was going to eat itself. SK Hynix, the South Korean chipmaker that became the poster child for the artificial intelligence memory boom, watched its Seoul-listed shares swing wildly as a sweeping selloff in memory stocks spread from Wall Street to Asian markets.
Here’s the thing: the selloff hit a company that had been on an almost absurd run. SK Hynix shares had climbed roughly 260% year-to-date before the pullback began, a gain that reflected the market’s conviction that high-bandwidth memory, the specialized chip architecture powering AI accelerators, was the most important piece of silicon in the world right now.
What triggered the memory selloff
The cracks appeared between June 23 and June 25, when reports emerged about capacity shifts at SK Hynix, followed by earnings reactions from competitors including Samsung. Traders who had been riding the AI memory wave hit the exit at roughly the same time.
The result was a synchronized decline across the sector. Memory stocks including SK Hynix, Samsung, and Micron fell more than 20% from their highs, the traditional threshold for a bear market, by early July. Semiconductor stocks as a group shed approximately $1.5 trillion in combined market value during this period, with Micron alone accounting for nearly $350 billion of that loss.
The ADR IPO that launched into the storm
The timing of SK Hynix’s U.S. market debut made the selloff storyline even more complicated. The company’s American Depositary Receipt IPO, priced between $26.5 billion and $30 billion, launched into this turbulent environment and was oversubscribed despite the market chaos around it.
Shares opened at $170, a 14% premium to the IPO reference price of $149. In English: investors who wanted in badly enough to pay above the listed price on day one, even as the broader sector was bleeding.
What investors should actually watch now
For anyone watching SK Hynix from the outside, the fluctuating shares in Seoul represent a genuine tension between two competing narratives. The bear case is simple: memory stocks ran too far, too fast, and the sector is now digesting a valuation reset. The capacity shift reports that triggered the selloff raise the possibility that supply is catching up to demand faster than the market had assumed.
The bull case is equally straightforward. HBM is not a commodity memory product. It requires advanced packaging techniques, specialized manufacturing processes, and tight integration with chip designers like Nvidia and AMD. SK Hynix holds a dominant position in this market, and that position does not evaporate because the stock corrected 20%.
The buying into weakness that Bloomberg observed in Seoul is consistent with this view. Micron’s performance during this period also matters for context. If Micron, which competes in overlapping memory markets, lost nearly $350 billion in market cap during the correction, it tells you how much froth had built up across the sector collectively.
The key variables to monitor going forward are capacity utilization data from major chipmakers, the pace of AI infrastructure spending from hyperscalers like Microsoft, Google, and Amazon, and any guidance updates from Nvidia on HBM demand. SK Hynix’s fortunes are tightly coupled to Nvidia’s order book, which means any signal from that relationship will move the stock more than almost any other factor.
Disclosure: This article was edited by Editorial Team. For more information on how we create and review content, see our Editorial Policy.
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