SK Hynix Posts Record Profit, Stock Sinks 8.76% on the Miss

SK Hynix just posted the most profitable quarter in its history — and its stock fell anyway. The company reported 60.5426 trillion won ($54.55 billion combined with revenue) in operating profit for Q2 2026, up 557% year over year, yet its Nasdaq-listed ADR (SKHY) closed down 8.76% at $130.49, a fresh all-time low since its record-setting listing this month.

red stock chart decline

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What happened

SK Hynix reported second-quarter revenue of 79.3187 trillion won and operating profit of 60.5426 trillion won, with an operating margin of 76.3% — a record for the company and, for a capital-intensive manufacturer, an almost unheard-of figure market watchers have called the "dream margin." Revenue climbed 257% year over year and operating profit jumped 557%, driven by surging demand for HBM, AI server DRAM, and eSSD. In a single quarter, SK Hynix earned more operating profit than it did in all of 2025 (47.2 trillion won). The company also began shipping HBM4 in Q2 and is supplying HBM4E samples to a major customer ahead of a planned full production ramp-up in the second half.

Despite those numbers, both figures missed Wall Street's expectations: analysts had modeled revenue closer to 84 trillion won and operating profit near 64 trillion won, meaning SK Hynix came in roughly 6.4% below the operating-profit consensus.

Why it matters / market reaction so far

The stock reaction was immediate and sharp. Shares in Seoul fell as much as 14.65% intraday to close around 1.55 million won, while the Nasdaq ADR dropped 8.76% to a new post-listing low. Slower-than-expected shipment growth in advanced AI memory chips was cited as a key driver behind the miss, and the overnight slide in US chip stocks compounded the move — the Philadelphia Semiconductor Index fell 4.49%, with Micron and SK Hynix's own ADR both down more than 8% before the print even landed.

This is the same volatility I flagged in SK Hynix ADR Slides Into Its Biggest Earnings Day Yet — the market had already been pricing in disappointment before the numbers came out. It also extends the pattern from SK Hynix's Record $26.5B ADR Sinks Below Its Offering Price: the ADR priced at $149 in its record $26.5 billion Nasdaq offering earlier this month, and at $130.49 it now sits nearly 12% below that offering price despite the company just posting its best quarter ever.

semiconductor memory chip wafer

Photo by PublicDomainPictures on Pixabay

Who and what is affected

  • SK Hynix (SKHY / 000660.KS): Fresh post-listing lows on both the Seoul-listed common shares and the Nasdaq ADR, even as fundamentals hit records.
  • Micron (MU): Trading as the closest US-listed HBM/DRAM peer, Micron fell alongside the broader semiconductor selloff and will face similar scrutiny on its own shipment-growth guidance.
  • Samsung Electronics: As the other half of the Korean memory duopoly, Samsung's HBM and DRAM guidance will now be read against SK Hynix's miss as a read-through for the whole sector.
  • Nvidia (NVDA) and AI hyperscalers: HBM supply and pricing feed directly into AI server buildouts, so any sign that shipment growth is decelerating — even amid record profit — reads as a signal on the durability of AI infrastructure demand.

What to watch next

The company's earnings call is where the real signal will come from: guidance on HBM4/HBM4E ramp timing, memory pricing trends into the back half of the year, and any commentary on long-term supply agreements (LTAs) with major AI customers. Investors are treating the shipment-growth slowdown as more informative than the record headline profit, since it speaks to whether 2026's AI memory supercycle can sustain its current pace into 2027. Analysts will also be watching whether the stock stabilizes above or continues drifting below its $149 ADR offering price, which has effectively become a psychological line in the sand for the Nasdaq listing.

This is not financial advice — always do your own research before making investment decisions.

The paradox here is a familiar one in AI-cycle stocks: record results are no longer enough on their own — they have to beat already-elevated expectations. SK Hynix delivered the best quarter in its history and still sold off, because the market is now pricing in the trajectory of AI memory demand, not just the last three months of it.

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