China’s AI Model Sparks 10% Drop in Semiconductor Stocks

A new artificial intelligence model from China has intensified a selloff in semiconductor stocks, pushing the PHLX Semiconductor index down 10% this week, its steepest decline since April 2025. The index, which includes major companies like Nvidia and Broadcom, has now entered bear market territory, defined as a drop of 20% or more from a recent peak. The selloff was exacerbated on Friday as broader market concerns about competition in AI and rising corporate spending emerged.

Market Reaction

The news of China's Kimi K3, touted as the world’s largest open-source AI model, has raised alarms among investors. The model reportedly outperformed established U.S. counterparts in certain coding benchmarks, which are crucial for assessing AI performance. Investors are increasingly worried that the rise of cheaper, customizable AI models could undermine the business prospects of leading firms like OpenAI and Anthropic, which rely on high capital spending to support their proprietary systems. As a result, tech stocks led the market decline on Friday, with the S&P 500 index falling 1% and the Nasdaq composite down 1.4%. Only energy stocks managed to gain ground amid the broader downturn.

Implications for the Industry

The emergence of open-weight models like Kimi K3 could shift the landscape of AI development. These models are free to download and can be tailored by users, potentially reducing costs significantly. As companies look for ways to manage AI expenses, many are turning to these more affordable options, raising questions about the sustainability of current valuations in the semiconductor sector. The selloff reflects growing skepticism about whether the anticipated growth in AI can justify the high valuations in the chip industry. Investors have been increasingly cautious, leading to a notable decline in chip stocks over recent weeks.

Related coverage: US stocks decline as semiconductor selloff deepens.