SK Hynix Sinks 6% as Seoul Selloff Extends to Fifth Session; Western Digital and Seagate Drop 7%

SK Hynix (NASDAQ:SKHY) stock is down 6% to $153.04 in early trading as a Seoul selloff carries into U.S. markets. It’s been a rough ride as SK Hynix’s Seoul-listed shares posted a fifth consecutive decline.

Meanwhile, Western Digital (NASDAQ:WDC | WDC Price Prediction) stock is down 7% to $361.76, a steeper slide than shares of the memory maker that set off the selling. Likewise, Seagate Technology (NASDAQ:STX) stock is down 7% to $703.58, moving in step with its hard-drive rival. That storage pair is taking more damage than SK Hynix stock, even though the development behind the rout targets memory chips.

Two funds show how narrowly the damage is contained. The Roundhill Memory ETF (CBOE:DRAM) is down 5% to $52.07, reflecting heavy losses among memory chip makers. By comparison, the Invesco QQQ Trust (NASDAQ:QQQ) is down 0.5% to $742.34, a far milder dip for the large-cap technology benchmark.

Chinese Memory Advance Triggers Global Chip Rout

The trigger came from ChangXin Memory Technologies (CXMT), a privately held Chinese memory maker. Over the weekend, CXMT said it had made progress on a memory-cell design that packs more capacity into the same chip area. CXMT plans to launch a server memory product built on that design by year end, and the news deepened a global selloff across the chip sector overnight.

South Korea’s benchmark index fell sharply as the selling hit Seoul first. Concerns about the sustainability of artificial intelligence (AI) spending added to the pressure. That pressure spread across chip names in Europe and the U.S. during the same stretch (we profiled seven AI infrastructure suppliers outside the chipmakers, from power to cooling, in a free report here). As a maker of server memory and flash storage chips, SK Hynix sits squarely in the path of a rival promising more capacity in the same space.

Hard Drive Makers Absorb the Bigger Blow

Nasdaq-traded SK Hynix shares follow a Seoul listing that changes hands while the U.S. market is closed, so the selling arrived fully decided. SK Hynix stock had already come off the all-time high it reached over the summer, and the five-session decline in Seoul has carried that drawdown further.

Western Digital and Seagate both make hard disk drives for data center storage, a different product from the server memory at the center of the CXMT announcement, yet their shares are falling harder than SK Hynix stock, which is the detail this selloff turns on. Storage and memory names are trading as a single group, with the Chinese threat built into onto every name in it.

What to Watch Next

One question remains open for Western Digital and Seagate: whether the hard disk business CXMT’s design doesn’t touch separates from the memory names once the selling stops. Any difference from SK Hynix stock as the Seoul listing steadies would suggest the market is pricing the CXMT risk product by product.

CXMT’s server memory launch, planned for year end, offers a concrete checkpoint for testing the Chinese threat. Until then, investors may want to keep their positions modest and watch for updates on that product’s timing or capabilities. A delay or weaker product could ease pressure on memory names, while a smooth launch could deepen it.

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