Chinese shares hit one-year low as technology stocks slide

Chinese equities dropped to their lowest point in a year, with technology and semiconductor stocks bearing the brunt of a selloff driven by shifting US export policies and growing uncertainty about China’s domestic chip ambitions.

The CSI 300 declined 2% on September 27, while major Chinese chip names took steeper hits. Cambricon fell 5.7% and SMIC dropped 3.6%, extending a painful stretch for a sector caught between geopolitical crossfire and investor skepticism about the viability of homegrown alternatives to Western silicon.

What’s driving the selloff

The immediate catalyst was a confluence of bad news for Chinese tech. Reports suggesting the US may ease restrictions on Nvidia’s advanced H200 chips created a counterintuitive problem for domestic chipmakers: if Chinese companies can access American chips again, even under restrictions, the investment case for less capable domestic alternatives weakens considerably.

Adding to the pressure, OpenAI announced a pause on frontier model work, which sent ripples across Asian chip stocks broadly.

The damage wasn’t limited to chipmakers. Optical module manufacturers Zhongji Innolight and Eoptolink saw their shares drop roughly 10% in August after news of US import bans on certain components. That contributed to a 9% decline in the CSI 300 telecom services index during the same period.

July 2026 marked the CSI 300’s worst monthly performance in a decade, with an 8.6% drop fueled by global tech selloffs and profit-taking in domestic memory chipmakers like CXMT.

The semiconductor tug-of-war

At the heart of this story is a policy paradox. The US has spent years tightening export controls on advanced chips to China, pushing Beijing to pour billions into developing its own semiconductor supply chain. Companies like Cambricon and SMIC became the beneficiaries of that strategy, attracting investment as proxies for China’s tech self-reliance narrative.

Now, reports that the US might selectively ease restrictions on certain Nvidia products have introduced a new wrinkle. If approved foreign chips become available, even in limited quantities, Chinese companies and cloud providers may prefer them over domestic options that cost more and deliver less.

China’s government has signaled it still prioritizes domestic suppliers over approved foreign models, but investor sentiment doesn’t always follow policy directives.

Broader market context

The CSI AI Index, which tracks companies involved in artificial intelligence development and infrastructure, has been especially volatile. After rallying earlier in the year on optimism around China’s DeepSeek AI models and a wave of enterprise AI adoption announcements, the index has given back a significant portion of those gains.

What to watch next

The trajectory of US export policy remains the single most important variable for Chinese tech stocks. Any formal announcement regarding Nvidia H200 chip access, whether easing or tightening restrictions, could trigger significant moves in either direction.

Investors should also watch for signals from China’s Ministry of Industry and Information Technology about procurement mandates for domestic chips. If Beijing responds to the current selloff by doubling down on self-reliance directives, companies like Cambricon and SMIC could find a floor.