Chip Stocks Fall as AI Funding and China Competition Raise Concerns

Global semiconductor stocks declined Tuesday as investors reassessed artificial intelligence financing risks and the growing competitive threat from Chinese chipmakers. Micron Technology, SoftBank Group, and major Asian and European chip companies fell after a Wall Street sell-off spread across international markets, amid concerns about AI investment sustainability and China's advances in memory technology.

Micron shares dropped around 3% in U.S. premarket trading, while SanDisk, Seagate, and Western Digital each lost around 3%. The declines followed a 3.9% drop in Micron shares during Monday's U.S. trading session, when the Nasdaq Composite fell 0.44%.

Investors also reacted to progress announced over the weekend by China's ChangXin Memory Technologies (CXMT), which is developing a chip architecture designed to increase memory density by storing more data in less space. CXMT competes with Micron and South Korean manufacturers Samsung Electronics and SK Hynix, although analysts generally consider the Chinese company behind those established leaders.

Vey-Sern Ling, senior equity advisor at UBP, said investors were increasingly willing to sell AI-related stocks that had performed strongly this year, particularly memory chip companies.

"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, UBP's senior equity advisor.

Ling said China's memory manufacturers could eventually affect the global balance between supply and demand, but technological limitations remain a near-term obstacle, particularly in advanced memory products used for AI computing.

"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 via email.

CXMT shares closed 2.8% lower in Shanghai, despite the company's reported technological progress. The announcement intensified concerns about future competition even as established manufacturers maintained advantages in advanced memory production.

Phillip Wool, chief market strategist at Rayliant Global Advisors, described CXMT's progress as an important development for China's semiconductor industry. However, he said the immediate market reaction appeared excessive because the company had not demonstrated large-scale production and continued to trail Samsung and SK Hynix in market share.

Wool emphasized that high-bandwidth memory (HBM), which is critical to AI applications, remained dominated by South Korean manufacturers.

"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," said Wool, Rayliant Global Advisors' chief market strategist.

He linked the broad declines to fragile investor confidence in AI-related investments rather than a fundamental change in the semiconductor industry's competitive position.

"I read that more as a sign of how vulnerable AI sentiment is at this moment," Wool said.

Wool also warned that volatility could continue as investors reconsider chip demand and the ability of semiconductor manufacturers to maintain pricing power.

Technology stocks across Europe and Asia recorded substantial losses. In early European trading, ASML fell 3.3%, while STMicroelectronics and Infineon each declined 5%. Dutch semiconductor equipment companies BE Semiconductor and ASM International were both down around 4% at the open.

In South Korea, SK Hynix plunged more than 10%, while Samsung Electronics fell 7.4%, with both stocks reaching their lowest levels since August. SK Hynix's U.S.-listed shares dropped around 5% in premarket trading.

Japan's technology sector also weakened. SoftBank Group fell 8.5%, reflecting its significant exposure to the AI industry through its investment in OpenAI. Tokyo Electron dropped 7.2%, Advantest declined 2.9%, Lasertec lost more than 5%, Disco fell 4.7%, and Renesas Electronics shed 5.9%.

Adding to investor concerns, Tesla and SpaceX chief executive Elon Musk commented on China's manufacturing capacity on Monday, highlighting the country's ability to expand production once it masters a product's manufacturing process.

"When China figures out how to manufacture a product, their ability to scale is often greater than the rest of the world combined," said Elon Musk, chief executive of Tesla and SpaceX.

The sell-off comes as semiconductor industry leaders raise concerns about financing constraints. The chief executives of Intel and Broadcom have warned that access to capital could become a major obstacle to the AI boom, even as demand for computing infrastructure continues to exceed supply.

Investors are also preparing for a busy week of corporate earnings reports and U.S. inflation data, which could provide further indications about the interest-rate outlook. Interest rates often move inversely to growth stocks, adding another factor to the market's assessment of technology valuations.