CXMT flagged a denser chip design, sending memory stocks lower: Micron and SK Hynix fell 4% and Western Digital dropped 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) is trading at $984.28, down 4%, a decline that still leaves the shares up 245% year to date. The Roundhill Memory ETF (CBOE: DRAM) fell 4% while the SPDR S&P 500 ETF Trust (NYSEARCA: SPY) held flat, indicating that the selloff has been concentrated in the memory sector. Mehrotra forecast that AI demand will exceed supply through 2028, but whether CXMT's server product ships and wins customer qualification is the real test.

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

The Roundhill Memory ETF is at $54.75, down 4%, showing that the selling has spread across the group. The SPDR S&P 500 ETF Trust, by contrast, is steady at $778.55, nearly unchanged.

**CXMT Takes Aim at Server Memory**

ChangXin Memory Technologies (CXMT), a Chinese chipmaker that is not 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, stating 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.