Chinese technology hardware shares set for worst quarterly performance as AI selloff deepens

China’s AI-adjacent tech stocks just posted a quarter that corporate PR teams will quietly pretend never happened. The STAR 50 Index, which tracks many of the country’s most prominent technology and semiconductor names, has fallen approximately 30% since the end of June, putting the sector on track for its worst quarterly performance in recent memory.

The damage was concentrated in July, when a brutal selloff erased more than 28% of the index’s value. That came immediately after a nearly 75% rally over the prior three months, a whiplash sequence that transformed euphoria into something closer to existential dread for AI hardware investors.

What triggered the crash

The selloff wasn’t a uniquely Chinese phenomenon. Global chip stocks got hit simultaneously, with semiconductor indices in South Korea, Taiwan, and the US all sliding in sympathy. The common thread: investors started asking a very inconvenient question about whether the enormous capital being poured into AI infrastructure would actually generate proportional returns.

The CSI 300 Index, China’s broader blue-chip benchmark, fell nearly 9-10% in July alone. That marked its worst monthly performance since January 2016, a period when Chinese markets were still recovering from a historic equity bubble collapse.

Among the hardest-hit individual names, Biwin Storage Technology and Moore Threads Technology each saw their share prices collapse by more than 40%. Yuanjie Semiconductor and Hua Hong Grace Semiconductor both experienced single-day drops of 14% or more during July’s most intense selling sessions.

Competition from within made things worse

Advances in open-source AI development, including models like Moonshot’s Kimi K3, have started to undercut the assumption that AI leadership requires the most expensive hardware stack money can buy. If competitive AI systems can be built on leaner infrastructure, the investment case for premium semiconductor and storage companies gets significantly harder to defend.

Investors responded by rotating capital into defensive sectors, a classic flight-to-safety pattern that tends to accelerate once momentum turns negative.

State intervention fell flat

Beijing’s playbook for managing equity market stress typically involves state-backed funds stepping in to buy shares and provide a floor. That playbook was deployed during July’s turbulence.

It didn’t work particularly well. While state-backed purchases provided brief reprieves in trading sessions, the buying wasn’t sufficient to reverse the broader downtrend.

For context, the STAR Market was specifically designed to serve as China’s answer to Nasdaq, a venue for high-growth technology companies that might not meet the profitability requirements of more traditional exchanges.