Memory stocks slump as China competition and 2029 oversupply fears mount

Memory chip stocks have been hit hard over the past five days, extending losses amid wider turbulence in global equity markets. According to CNBC, SK Hynix has fallen 26%, Samsung has dropped 22% and Micron is down roughly 11% over that stretch. Two distinct worries are driving the selling: whether Chinese rivals are about to take market share, and when the memory market might swing from shortage into oversupply.

The first jolt came early in the week when China's leading memory maker, ChangXin Memory Technologies (CXMT), said it plans to launch a server memory product built on a new architecture. The design promises higher storage density, which raised fears that CXMT could erode share held by Samsung, SK Hynix and Micron. But several analysts pushed back on that reading. Ben Barringer, global head of technology research at Quilter Cheviot, told CNBC that an architectural change still leaves open the question of manufacturing yield, while Kevin Cassidy of Rosenblatt Securities said the development is unlikely to add meaningful supply to the market at all.

Traders were also digesting an opinion column in South Korea's Maeil Business Newspaper urging the government to prepare for an AI slowdown and cultivate new growth engines. The writer cited Professor Hwang of Seoul National University and Ahn Ki-hyun, executive director of the Korea Semiconductor Industry Association, as expecting a "flood of new supply" that turns memory into a "red ocean" by 2029, with the supercycle potentially ending and a downturn arriving by 2030, according to a CNBC translation. Elon Musk weighed in on X, saying China "will be making a LOT of RAM in 2028." Analysts have not broadly echoed a forecast that far out.

Memory chips were historically consumed mainly by consumer electronics makers for smartphones and laptops, but the AI buildout has made them a critical component of Nvidia chips and the broader data center supply chain. Tightening supply against rising demand has fueled unprecedented price increases and huge rallies in the shares of the three biggest manufacturers, prompting investors to ask whether the industry's familiar boom-and-bust pattern has fundamentally changed. All major makers are expanding capacity, but new factories take roughly three to five years to build and bring online, leading many analysts to expect the shortage to persist until 2028.

Even a downcycle may not look like past ones. Counterpoint Research projects DRAM prices falling about 23% in 2028 versus 2027, yet still sitting roughly 230% above 2025 levels. Jeongku Choi, a senior research analyst at the firm, told CNBC that suppliers and buyers are signing three- to five-year long-term agreements with upfront payments and agreed price floors and ceilings, which should prevent the sharp declines seen historically.