Global technology stocks fell on Tuesday as investors extended a sell-off in artificial intelligence-related shares, weighing the competitive implications of advances by China’s memory chip industry against concerns over AI financing, semiconductor valuations and the sustainability of demand.
Memory chipmaker Micron Technology fell about 3% in US premarket trading, while Broadcom also came under pressure. SanDisk, Seagate Technology and Western Digital, which have exposure to memory and data storage, each declined around 3%.
The retreat followed losses on Wall Street on Monday and spread across major semiconductor markets in Asia and Europe. South Korean chipmakers SK Hynix and Samsung Electronics suffered particularly steep declines, while Japanese semiconductor equipment manufacturers and technology-focused investment group SoftBank also fell sharply.
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Investors were responding partly to developments at ChangXin Memory Technologies (CXMT), China’s leading domestic rival to Micron and South Korean memory chip giants SK Hynix and Samsung. Over the weekend, CXMT announced progress in a new chip architecture designed to increase memory density by packing more data into less space.
Although CXMT remains behind established manufacturers in several advanced memory technologies, its progress has renewed questions about how quickly Chinese competitors could challenge incumbents and alter the economics of a market benefiting from AI-driven demand.
The broader sell-off, however, suggests that concerns about Chinese competition are interacting with a fragile investor appetite for AI-related stocks, many of which have recorded substantial gains this year.
“Investors are jittery and looking for excuses to take profit on AI-related stocks that have outperformed this year, especially memory stocks,” said Vey-Sern Ling, senior equity adviser at UBP.
Ling said Chinese memory manufacturers could eventually affect the global balance between supply and demand, but cautioned that their near-term competitive threat remains limited by technological constraints.
“In reality, while the Chinese memory makers can potentially become a threat to global demand-supply balance over time, in the short run they continue to face technology hurdles, especially for more advanced memory like HBM,” Ling told CNBC by email.
CXMT shares closed 2.8% lower in Shanghai on Tuesday, despite the attention surrounding its technological progress.
CXMT’s Progress Raises Longer-Term Competitive Concerns
The immediate focus is on whether advances in Chinese memory technology could eventually allow domestic manufacturers to capture more market share from established suppliers.
CXMT competes in the dynamic random-access memory, or DRAM, market, where increasing demand from AI servers has made performance, capacity and production efficiency particularly important. Improvements in chip architecture can potentially allow manufacturers to store more data within a given area, although commercial competitiveness also depends on manufacturing yields, reliability, production scale and cost.
China’s efforts to strengthen its domestic semiconductor industry have added another dimension to the competition. Technology restrictions have complicated access to some advanced foreign equipment and technologies, increasing the importance of domestic research and manufacturing capabilities.
CXMT’s announcement has therefore attracted attention beyond the immediate memory market. If the company can translate its design progress into reliable, high-volume production, it could eventually put pressure on competitors’ pricing power and margins.
But a technological advance does not automatically translate into a commercially competitive product. Manufacturers must demonstrate that new designs can be produced consistently and at scale before they can meaningfully alter global supply.
Phillip Wool, chief market strategist at Rayliant Global Advisors, described CXMT’s progress as an important milestone for Chinese chipmakers, showing their ability to overcome some technology restrictions and potentially challenge established players sooner than expected.
He nevertheless argued that the market’s reaction overstated the immediate threat, given CXMT’s limited position relative to established suppliers and the gap between technological development and large-scale production.
That thinking matters in high-bandwidth memory (HBM), a specialized type of memory used in advanced AI accelerators. HBM is central to the performance of many AI computing systems and has become an important source of demand for SK Hynix and Samsung.
“More importantly, we’re not even talking about HBM here, and the Korean chipmakers are still unquestionably dominating that space, with very little threat at all from the likes of CXMT or anyone else for the foreseeable future,” Wool said.
His assessment highlights the difference between the possibility of greater competition in conventional memory products and the more demanding technological requirements of supplying advanced AI infrastructure.
For investors, the risk is that expectations for sustained memory demand and strong pricing could be challenged over time if additional supply enters the market. However, CXMT’s latest announcement does not establish that such a shift is imminent.
Sell-Off Spreads Across Asia and Europe
The declines extended well beyond US memory stocks, reflecting the interconnected nature of the semiconductor supply chain and the sensitivity of technology valuations to changes in AI investment expectations.
SK Hynix shares plunged more than 10% in South Korea, while Samsung Electronics fell 7.4%. Both stocks touched their lowest levels since August. SK Hynix’s US-listed shares were down around 5% in premarket trading.
The sell-off caused a ripple because both companies are major suppliers of memory products used in AI systems. Investors have been betting that rising demand for AI computing would support earnings and pricing power among companies supplying the essential components.
In Japan, SoftBank Group fell 8.5%, leading a broader retreat in technology-related shares. SoftBank has substantial exposure to the AI industry through its large investment in OpenAI, making its shares sensitive to changes in sentiment towards the sector.
Tokyo Electron, a major supplier of semiconductor manufacturing equipment, dropped 7.2%, while semiconductor testing equipment maker Advantest declined 2.9%. Lasertec fell more than 5%, Disco lost 4.7%, and Renesas Electronics dropped 5.9%.
European semiconductor stocks also weakened. ASML, which supplies advanced lithography equipment used in chip manufacturing, fell 3.3%. STMicroelectronics and Infineon each declined 5%, while BE Semiconductor and ASM International were both down around 4% at the open.
The breadth of the declines suggests investors were not simply repricing CXMT’s competitive position. Semiconductor equipment suppliers, memory producers, chip designers and investment companies have different exposures to the AI market, but all are vulnerable to a broad reassessment of future spending and earnings expectations.
The Nasdaq Composite had fallen 0.44% on Monday, while Micron dropped 3.9% during the session, setting the stage for further weakness in technology shares.
AI Financing Concerns Add to Market Anxiety
Developments in China were not the only factor weighing on sentiment. Investors have also become more attentive to the financing requirements of the AI boom and the question of whether spending on data centers, chips and computing infrastructure can generate sufficient returns.
The chief executives of Intel and Broadcom have warned that access to capital and the cost of financing could become significant constraints on the industry, even while demand for computing capacity remains stronger than available supply.
That concern introduces a potential tension into the AI investment cycle. Semiconductor manufacturers may continue to benefit from strong demand, but the pace of new orders ultimately depends on customers’ ability and willingness to finance increasingly expensive infrastructure.
If borrowing costs remain elevated or investors become less willing to fund large AI projects, companies could reassess expansion plans even without a sudden decline in demand for computing power. Such a shift could affect chipmakers and equipment suppliers whose valuations depend on expectations of continued investment growth.
Wool interpreted the latest market reaction as evidence of this wider vulnerability rather than proof that China’s memory industry had immediately changed the competitive landscape.
“I read that more as a sign of how vulnerable AI sentiment is at this moment,” Wool said, warning that volatility could persist as investors reassess chip demand and how long semiconductor manufacturers can maintain their pricing power.
The AI trade now faces several overlapping questions: how quickly computing demand will grow, whether infrastructure spending will produce adequate returns, how much new semiconductor supply will emerge, and whether current valuations already assume an unusually favorable outlook.
Investors are also looking ahead to a busy week of corporate earnings and US inflation data, both of which could influence the outlook for technology stocks.