(Bloomberg) -- China's microchip industry is feeling the heat of Beijing's regulatory scrutiny.
A warning in state media Friday that regulators will show no tolerance in cracking down on speculators in the chip market sent related stocks lower on Monday.
China's biggest chip foundry Semiconductor Manufacturing International Corp. dropped 5% in Hong Kong, while Hua Hong Semiconductor Ltd. tumbled 5.7% in its worst drop in nearly three months. Shanghai-listed Will Semiconductor Co. fell 5.7%, while Hubei Tech Semiconductors Co. was down 3.3%.
For investors, the warning presents another challenge in an increasingly uncertain regulatory landscape, coming soon after the launch of a probe this month into possible chip price manipulation -- chilling a sector buoyed by a global semiconductor shortage that's approaching the 12-month mark.
Read more: China's Summer of Stock Market Turbulence: A Timeline
SMIC has also rallied this year on bets that semiconductor firms will benefit from state largesse, even as Beijing pursues a broader crackdown in the tech sector that's ensnared the likes of Alibaba Group Holding Ltd. and Tencent Holdings Ltd.
In the commentary Friday, broadcaster CCTV said that some auto chip distributors have “maliciously” pushed up prices. It urged sellers to be disciplined and refrain from hoarding components.
A prolonged global chip shortage has driven up prices of chipsets, complicating China's bid to gain clout in advanced components used in devices from smartphones to base stations. Chinese automakers, for example, import about 90% of the high-end chips they require.
Traders have been cautiously looking for signs as to what other sectors could next be targeted by Beijing after a ban on profits for after-school tutoring firms triggered a selloff last month, amid concerns over further crackdowns in digital gaming, e-cigarettes and property.
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