SK Hynix's Profit Engine Roars Toward 80% Margins Even as Seoul Traders Hit the Brakes

SK Hynix closed at 1,681,000 KRW as chip stocks sold off, while brokers project up to an 80% operating margin for Q3 2026 on HBM demand.

Two competing forces are pulling at SK Hynix this week: a near-term sell-off that dragged the stock to 1,681,000.00 KRW at Friday's close in Seoul, and a wave of analyst forecasts that point to profitability rarely seen in the memory chip industry.

The retreat in the Korean market wasn't about SK Hynix itself. Samsung Electronics set the tone with preliminary quarterly figures that fell short of the upper end of market expectations, souring sentiment across the entire memory segment. The disappointment rippled outward fast, with profit-taking spreading through semiconductor names as investors began questioning whether recent earnings momentum can hold.

External Pressure Compounds the Pullback

Global markets added fuel to the downdraft. Rising US Treasury yields, a softer Philadelphia Semiconductor Index and unease over energy prices prompted foreign and institutional players to trim exposure to Korean equities. Index fund rebalancing and options expiry pressure reportedly added to the selling. Despite the slide, the stock clings to a razor-thin 0.2% advantage over its 50-day moving average — a sign that the longer-term trend hasn't broken.

What the correction really exposes is how little room for error high expectations have left. After a stretch of strong gains, any hint of slowing earnings growth invites quick exits.

Broker Forecasts Point to Historic Profitability

The picture looks very different on the fundamentals side. Ahead of SK Hynix's own quarterly report, brokerages are projecting an operating margin of as much as 80% for the third quarter of 2026 — a level that would place the company third worldwide among memory makers at that profitability tier, behind only Micron.

A consensus of eight brokerages puts third-quarter 2026 revenue at 94.9883 trillion won, with operating profit averaging 74.3433 trillion won. That translates to an operating margin between 78% and 80%, building on the 76.3% the company already posted in the prior quarter.

The engine behind those numbers is high-bandwidth memory. SK Hynix commands more than half of the global HBM market and produces over 50% of all current HBM4 chips. Shipments of the HBM4 generation stand to gain further momentum from Nvidia's accelerator architectures. Looking past the current quarter, FnGuide sees a 79% margin in the first quarter of 2027, while brokers suggest 82% to 83% could be achievable in the summer half of 2027.

AI Spending Keeps Demand Red-Hot

None of this would be possible without the memory shortage gripping the data center sector. Microsoft, Google, Amazon and Meta together are budgeting at least 300 billion US dollars for AI infrastructure in 2026 alone. SK Group Chairman Chey Tae-won has echoed that optimism, pointing to continued rapid growth in chip demand.

To keep pace and secure future technology interfaces, SK Hynix is working with TSMC on logic processes and is weighing additional partnerships for next-generation products such as HBM4E.

Gwangju Cluster and Solidigm Options in Focus

Longer-term expansion plans are moving ahead regardless of the day-to-day market noise. Chey Tae-won visited the planned semiconductor cluster site in Gwangju and reaffirmed the goal of realizing the project as quickly as possible. The company expects sustained demand growth to require capacity beyond its Yongin cluster, with the first Gwangju fabrication plant slated to begin mass production in June 2030.

On the corporate structure front, Bloomberg reported that Goldman Sachs and Morgan Stanley have been mandated as lead underwriters for a potential US IPO of subsidiary Solidigm, a deal that could reach roughly 10 billion dollars. Solidigm, which emerged from Intel's NAND business in 2021, is also the subject of various financing options being explored for further expansion. SK Hynix made clear that options are under review but no concrete plans have been set, with preserving economic value for existing shareholders a key criterion for any decision.

Investors will get a clearer read on the past quarter's actual performance shortly.