SK Hynix got the kind of earnings report that should have been a victory lap: second-quarter operating profit surged 557% from a year earlier, revenue more than tripled, and net profit jumped on a massive gain from selling part of its Kioxia stake. Yet the stock still sank, the KOSPI slumped, and investors delivered a blunt verdict on the AI memory trade. The Korean chip maker’s numbers were strong by any normal measure, but they fell short of the market’s loftiest expectations, and that was enough to shake one of Asia’s hottest stocks.
The reaction was immediate. SK Hynix closed down 9.61% at 1.4 million won on Wednesday, July 29, 2026. The KOSPI benchmark index fell 6% the same day. After a relentless run higher into its June peak, SK Hynix has now lost roughly 45% of its value in about a month, wiping out more than $500 billion in market value. In a market built on AI enthusiasm, the message was clear: beat the year-earlier comparison, and still disappoint if the bar has moved even higher.
For the April-to-June quarter, SK Hynix reported operating profit of 60.5 trillion won. That was up 557% year on year, but it still came in below the LSEG SmartEstimate consensus of 64 trillion won. Revenue rose 257% from a year earlier to 79.3 trillion won, also missing the roughly 84 trillion won analyst estimate. Net profit surged to 93.9 trillion won, aided by a one-time gain of about 63.3 trillion won from the sale of its Kioxia stake.
The mixed result underscores how fragile market sentiment can be when a stock has already priced in near perfection. SK Hynix is the bellwether for high-bandwidth memory, or HBM, the specialized chip used in AI systems. That puts the company at the center of one of the most lucrative corners of the semiconductor market. But it also means investors are watching every detail of mix, timing and guidance, not just the top-line growth rate.
SK Hynix said the earnings miss came from its HBM-heavy sales mix, which benefited less from soaring conventional DRAM prices, and from delayed HBM4 shipments. That matters because conventional DRAM has been one of the biggest profit engines in the cycle, while HBM, despite its strategic importance, can distort the comparison when its shipments do not line up with the hottest part of the pricing curve.
On the company’s earnings call, President Song Hyun-jong said, “Major customers are still requesting more memory supply,” according to Reuters and DealStreetAsia. That is the kind of line chip investors want to hear. It signals demand remains in place even after a big rerating in the stock. But the market is also focused on whether that demand can convert into shipments fast enough to sustain the pace of earnings growth that has driven the rally.
Another voice from the market captured the tension. Josh Gilbert, lead analyst for APAC and Middle East at eToro, said: “When you’re the dominant supplier of the high-bandwidth memory that powers Nvidia’s chips, the AI boom lands directly on your bottom line. That means the market is unlikely to focus on the headline numbers alone. The bigger question is whether margins and guidance can justify its recent performance.” His point lands squarely in the current selloff: investors are no longer rewarding exposure to AI alone. They want proof the profits can keep outrunning expectations.
The company is trying to calm fears that the boom is turning into a glut. SK Hynix said the risk of memory oversupply remains “limited,” adding that capacity expansion will be flexibly aligned with confirmed customer demand. It also said it has concluded long-term agreements with around 10 customers, typically five-year terms with deposit safeguards. Those contracts may help stabilize the business by giving it more visibility on demand and reducing the chance of a sudden collapse in pricing.
Still, the market is hearing a different kind of concern from some analysts. Lee Min-hee, an analyst at BNK Investment & Securities, said: “There are concerns that tech firms will take a breather in infrastructure spending.” That’s the risk hanging over the entire AI supply chain. If cloud and chip customers slow their buildout, even temporarily, suppliers like SK Hynix can feel the air pocket quickly, especially after a run-up that has embedded very aggressive assumptions.
Capex is another point of focus. SK Hynix expects 2026 capital spending at the high end of the 40 trillion won range, up from about 30.2 trillion won in 2025. That signals confidence in demand and a willingness to keep adding capacity, but it also means investors must absorb another year of heavy spending before the benefits fully show up in cash flow. For a stock that has already endured a steep correction, capital intensity can become a renewed concern if sentiment turns cautious.
The company says HBM4 mass-production shipments began in the second quarter and that HBM4E samples were delivered to major customers in the first half. The next stage of the story is the ramp-up in the second half of 2026, with HBM4E mass production targeted for 2027. In other words, SK Hynix is not stepping away from the AI memory race. It is moving deeper into it.
That makes execution even more important. The market is no longer simply rewarding the fact that SK Hynix sells into AI demand. It wants evidence that the company can translate that demand into cleaner mix, stronger margins and shipping schedules that match customer needs. Delayed HBM4 shipments show how a small timing shift can hit a share price that has already outrun fundamentals.
The broader sector will now test whether SK Hynix’s setback is company-specific or a warning shot for the entire chip trade. Samsung Electronics is due to report on Thursday, July 30, 2026, and is expected to show a 19-fold jump in operating profit, with greater pricing power than SK Hynix. That makes Samsung’s results the next market checkpoint for anyone trying to judge whether the memory cycle still has fuel left.
Investors are also waiting for a clearer signal on how much of the upside SK Hynix intends to share. The company plans to disclose its shareholder return policy later in 2026, and that has become part of the valuation debate. Greg Roh, head of research at Hyundai Motor Securities, put it bluntly: “SK needs to come up with a concrete shareholder return policy to turn around investor sentiment,” according to Reuters and DealStreetAsia.
For now, the market has chosen caution over celebration. SK Hynix still delivered explosive growth, still sits at the center of the AI infrastructure trade, and still says demand is firm. But after a month that erased more than $500 billion in market value, the stock is trading like a company that has to prove every next quarter will be just as strong as the last one.
