SK Hynix's HBM Crown Is Under Siege — and the Charts Show Just How Far It's Fallen
Published on 08/10/2026 at 10:31 | Redaktion boerse-global.de
The numbers tell a brutal story. SK Hynix shares are trading at 1,420,000 won, a staggering 52.46 percent below the 52-week high of 2,987,000 won reached in June. The 30-day slide alone has wiped out 34.86 percent of the stock's value, and the equity now sits 32.58 percent beneath its 50-day moving average of 2,106,300 won. For a company that was the undisputed king of high-bandwidth memory just months ago, the descent has been vertiginous.
Yet here's the paradox: the stock is still up 118.56 percent on a year-over-year basis. The rally that preceded the crash was so explosive that even after this correction, long-term holders remain deeply in profit. The question now is whether the current weakness represents a buying opportunity or the beginning of a structural shift in the memory-chip pecking order.
Samsung's 80 Percent Yield Changes the Calculus
The proximate cause of the sell-off has a name, and it's not a macro headwind or an AI-demand scare. Samsung Electronics, SK Hynix's crosstown rival in Suwon, has announced an HBM4 production yield of 80 percent — the industry's so-called "golden" threshold that signals readiness for mass production. Samsung says it hit this milestone four months ahead of schedule, and its HBM4E yield in reliability testing has already topped 70 percent.
That changes the competitive math. UBS projects that Samsung will capture 41 percent of the HBM market by 2027, edging past SK Hynix's projected 39 percent share. The bank also expects Samsung's HBM4 revenue to triple in the third quarter of 2026 — a trajectory that, if realized, would fundamentally challenge SK Hynix's status as the preferred AI-memory supplier.
Should investors sell immediately? Or is it worth buying SK Hynix?
The $38 Billion Answer
SK Hynix's response has been characteristically aggressive. On August 7, the board approved a 54.3 trillion won investment package — roughly $38.3 billion — spanning two new fabrication facilities. The bulk, 35.2 trillion won, is earmarked for the Yongin Y2 plant dedicated to HBM and DRAM production, with construction slated to begin in July 2027 and the first cleanroom scheduled for June 2029. Another 19.1 trillion won will fund the Cheongju M17 NAND fab, breaking ground in February 2027 with cleanroom completion targeted for December 2028.
The company has also accelerated its broader expansion timeline: the Yongin cluster is now expected to be fully operational by 2033, earlier than originally planned. The strategic logic is straightforward — Omdia projects roughly 19 percent annual growth in both DRAM and NAND through 2030, and SK Hynix is betting that memory will account for 60 percent of all semiconductor revenue by the end of the decade.
Investors, however, initially balked at the sheer scale of the capital commitment. The stock's 7-day decline of 9.38 percent came as foreign investors dumped Korean chip equities worth approximately 5.9 trillion won between August 3 and 7, part of a broader rotation out of volatile tech names.
Wall Street Splits on the Recovery
The analyst community is sharply divided on what comes next. Morgan Stanley, in a report dated August 6, declared the memory-chip correction over. Analyst Sean Kim — who gained notoriety in 2021 for his "Memory, Winter Is Coming" warning — has reinstated a 2.6 million won price target on SK Hynix and raised his 2026 earnings estimate by 13 percent. His evidence: foreign selling is decelerating. After outflows of roughly $30 billion in June and $6.2 billion in July, August has seen just $4.3 billion leave Korean memory stocks so far.
JPMorgan goes even further, holding a 2.75 million won target for June 2027 and dismissing rumors of a 50 percent price discount on HBM4. The bank instead expects memory prices to rise 40 percent by 2027.
The bears counter that the correction reflects genuine structural risk, not mere sentiment. Even with the recent bounce — the stock gained 0.56 percent to 1,430,000 won on the back of a broader Seoul tech rally — the equity remains 17.04 percent above its 200-day moving average of 1,213,218 won, leaving room for further downside if that support fails.
Labor Unrest and a China Wildcard
Complicating the bull case is an unresolved labor dispute. SK Hynix and its union have completed five rounds of negotiations without reaching agreement on a plan to pay a portion of bonuses in company stock. The union has rejected the proposal, and more than 3,500 employees — roughly 10 percent of the workforce — are seeking to form a separate union. The standoff carries real operational risk: any disruption could delay the HBM4 ramp-up, whose series shipments began in the second quarter and whose expansion is planned for the second half of the year.
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There's also a strategic question mark in China. Reports suggest Apple is considering memory chips from Chinese manufacturer CXMT, which would mark a significant departure from the current dominance of Korean suppliers. SK Hynix, meanwhile, is exploring the sale of its Chongqing plant for approximately $3 billion — a move that would further reshape its global footprint.
What to Watch Next
The immediate catalyst is the expanded shareholder return program, expected by the end of September 2026. SK Hynix already pays a quarterly dividend of 273.3 billion won, and management has signaled additional measures are coming. If the company unveils a buyback program in the trillion-won range, it could provide a floor under the stock — a playbook already deployed by competitors Micron and Kioxia.
The longer-term test comes in July 2027, when construction officially begins on the Yongin Y2 fab. Between now and then, every quarterly report from Samsung will be scrutinized for evidence that its HBM4 revenue growth is exceeding the already-expected tripling. If it does, the pressure on SK Hynix's valuation will persist regardless of the stock's year-to-date gains.
For now, the market is weighing a simple proposition: is this a 52 percent drawdown in a company whose fundamentals remain intact, or the first sign that the HBM throne is changing hands? The next few quarters will deliver the verdict.
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