SK Hynix: HBM4 Production Goes Live as a $26.5 Billion Nasdaq Windfall Tests the Memory Cycle’s Mettle

SK Hynix stock suffered its steepest loss then rebounded after $26.5B US IPO and HBM4 mass production. Analysts warn memory shortage may worsen, supporting long-term outlook.

The past week for SK Hynix has been a masterclass in volatility. On Monday, the stock suffered its steepest single-day loss ever in Seoul. By Wednesday, it had roared back as much as 13% intraday before closing up 8.83% at 2,082,000 won. The whipsaw comes just days after the company pulled off the largest US listing by a foreign entity in history and announced the start of mass production for its next-generation HBM4 memory—a product tailor-made for Nvidia’s upcoming “Vera Rubin” AI platform.

SK Hynix has officially begun volume output of its 12-layer HBM4 chips, which have already passed Nvidia’s quality certification, according to industry reports from July 14. The company plans to sharply accelerate deliveries from September onward to meet insatiable demand for high-end AI hardware. In the first quarter of 2026, SK Hynix commanded a 56.4% revenue share of the global HBM market—a lead no rival has come close to challenging.

The Nasdaq debut, completed on July 10, was the real thunderclap. SK Hynix raised roughly $26.51 billion by placing 177.9 million American Depositary Receipts at $149 each. Demand outstripped supply by a factor of seven, underscoring the frenzy for AI memory plays among international investors. The fresh capital is already earmarked for expansion: the M15X facility in Cheongju, a new semiconductor cluster in Yongin, and a state-of-the-art chip-packaging plant in Indiana that is expected to come online in the second half of 2028.

The sheer size of that equity raise set the stage for the turbulence that followed. Fibonacci Asset Management founder and CEO Jung In Yun told CNBC that Monday’s record crash was a cocktail of profit-taking, ADR-related arbitrage, and a general risk-off shift toward Korean equities—not a fundamental deterioration in SK Hynix’s business. “The ADR itself wasn’t the main cause, but it accelerated short-term positioning. Investors who had profited from the strong rally used the successful ADR debut to lock in gains,” he explained.

Analysts, however, are doubling down on a narrative of historic scarcity. Meritz Securities senior analyst Kim Sunwoo calculates that DRAM manufacturers can currently meet only 75–80% of overall demand. By 2027, she warns, that coverage ratio could sink to around 60%, even after stripping out speculative orders. “As the supply shortage tightens further, memory prices and profits should keep rising. That supports a strong stock recovery,” she said. SK Hynix CEO Kwak Noh-jung shares that view, telling Reuters he expects 2027 to produce the worst memory shortage the industry has ever seen, with demand outstripping the company’s production capacity well beyond 2030.

Barclays has initiated coverage of the ADRs with an Overweight rating and a $330 price target, betting that the structural imbalance in DRAM will persist. The firm notes that leading suppliers simply cannot close the gap quickly enough. That theme is drawing attention to the broader chip complex: in Seoul, archrival Samsung Electronics gained 6.8% on Wednesday, while Seoul Semiconductor added 6.4%. In Japan, Advantest climbed 4.2%, Lasertec surged 6.4%, and Disco rose 2.8%, with Tokyo Electron and SoftBank Group posting more modest gains.

Macro conditions lent a hand as well. Strong results from major US banks and a softer-than-expected inflation report lifted the S&P 500 and Nasdaq, even as Middle East tensions simmered. Those tailwinds helped offset earlier jitters over a slowdown in quarterly memory price hikes expected in the second half of 2026—a concern that had sent chip stocks sliding in prior weeks.

Technically, SK Hynix still has ground to reclaim. The stock remains 30.30% below its 52-week high of 2,987,000 won, set on June 25, and sits 4.6% under its 50-day moving average of 2,181,404 won. The relative strength index stands at a neutral 46.2, while 30-day annualized volatility remains elevated at 126.21%—a sign that the market is watching the September delivery ramp-up and upcoming earnings with hawkish intensity. Yet with a year-to-date gain of 208.15%, the stock has already more than tripled, driven by an infrastructure buildout that shows no signs of easing.

SK Hynix’s capacity buildout is a multi-year marathon. Between the Cheongju and Yongin expansions and the Indiana packaging plant, the company is betting that today’s $26.5 billion cash pile will be the foundation for capturing the next waves of AI demand. The question now is whether the supply constraints that analysts and its own CEO are forecasting will deliver the sustained profitability that justifies the stock’s towering valuation—or whether the autumn ramp will reveal that the market has already priced in the shortage.