Memory Stocks Slide as China’s CXMT Flags Denser Chip Design: Micron and SK Hynix Fall 4%, Western Digital Drops 2%

Memory stocks are falling as a Chinese rival flagged progress on a denser server chip design that targets the most profitable corner of the industry. Micron Technology (NASDAQ:MU | MU Price Prediction) stock trades at $984.28, down 4%, a decline that still leaves the shares up 245% year to date.

Likewise, SK Hynix (NASDAQ:SKHY) stock is at $162.13, down 4%, tracking Micron. Meanwhile, Western Digital (NASDAQ:WDC) stock trades at $389.04, down 2%, a softer slide that leaves the shares up 126% year to date.

The Roundhill Memory ETF (CBOE:DRAM) is at $54.75, down 4%, showing that the selling has spread across the group. However, the SPDR S&P 500 ETF Trust (NYSEARCA:SPY) is holding steady at $778.55, with the fund nearly unchanged.

CXMT Takes Aim at Server Memory

ChangXin Memory Technologies (CXMT), a Chinese chipmaker that isn’t listed in the U.S., said it has made significant progress on a new cell design that increases storage density. Industry giants are pursuing the same architecture. CXMT President Cao Kanyu presented at an industry event in Shanghai over the weekend. He stated that the company aims to introduce a server memory product built on that design by the end of this year.

Server memory is where artificial intelligence buildouts have driven the strongest demand and where pricing has held up best. Micron’s adjusted gross margin reached 87% last quarter, up from 45.7% a year earlier, which shows how much pricing power is at stake.

Chipmakers Absorb the Direct Hit

CXMT’s claim lands directly on their earnings driver. Both Micron and SK Hynix sell the advanced memory that sits beside artificial intelligence accelerators (we covered seven other suppliers supporting the AI expansion, from power to cooling, in a free report here). Western Digital’s business is weighted toward storage, which is why the read-across reaches it less strongly. Samsung Electronics, SK Hynix and Micron are the three largest holdings listed in the Roundhill DRAM fund’s latest fact sheet.

Micron meets this competitive news from a position of strength. Its fiscal Q4 2026 revenue reached $54.23 billion against estimates of $50.97 billion, while adjusted earnings per share (EPS) of $33.42 topped the $31.35 consensus.

Management guided fiscal Q1 2027 revenue to $61.5 billion at the midpoint and adjusted EPS to $38.15, both pointing to another step up. Last quarter, Micron’s Core Data Center segment brought in $18 billion, and Cloud Memory added $16.28 billion. That is the earnings power now in CXMT’s sights.

Skeptics hold that memory has always been a boom-and-bust business, and a new player arriving with a denser design is how prior cycles turned over. Optimists point out that CXMT’s server product remains a stated target with nothing shipping yet, and artificial intelligence demand has so far absorbed everything the industry can make. Chief Executive Sanjay Mehrotra stated on Micron’s September 30 earnings call that “we do not have line of sight to when supply and demand will return to balance.”

What to Watch Next

Mehrotra also spoke on that call. He stated that “in calendar year 27 as well as 2028, we see demand exceeding supply.” That forecast now faces a test from a new competitor with a denser product. A smaller decline in Western Digital stock points to a threat aimed at one product class, with storage broadly intact.

The next signal is whether CXMT’s server product actually ships and wins customer qualification. Until then, however, holders of MU, SKHY, and WDC shares may want to keep their memory-sector exposure appropriately sized for a group that has run hard and now faces a credible challenger.

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