Chinese technology investors, who have already suffered deep losses from buying into the country’s beleaguered semiconductor stocks in Shanghai and Shenzhen, had a particularly hard week after a top fund manager briefly went incommunicado. Cai Songsong, a fund manager at the Shenzhen-based Lion Fund known for his heavy investments in listed chip stocks, published a note Tuesday night to his personal WeChat account saying he is “on vacation”, according to a screenshot of the post seen by Chinese financial news media CLS, run by the state-owned Shanghai United Media Group. The South China Morning Post was unable to reach Cai or verify the authenticity of the post. Beijing Business Today, a publication affiliated with the state-owned Beijing Daily, also cited a statement from Lion Fund saying Cai is on vacation and that the funds under his management are in normal operation. Lion Fund did not respond to requests for comment. Chinese chip experts debate impact of US Chips Act but see no quick solutions Cai’s brief absence came as China’s semiconductor stocks have plunged amid a slowing economy and an ongoing anti-corruption investigation into one of the biggest funds in the industry. As part of China’s state-led drive for semiconductor self-sufficiency, local stock markets have opened the door to companies in the local chip supply chain, attracting private funds and investors to back the country’s key players. But many retail investors who saw the state-led strategy as an opportunity were burned when chip stocks plunged in recent months. Maxscend Technologies, one of Cai’s biggest investments, has lost 72 per cent of its stock price since its peak in July 2021. Corporate filings this month from the company, which makes radio frequency chips, say Cai’s fund continued to buy into Maxcend multiple times from March through August. By September 8, the fund’s stake exceeded 5 per cent, triggering a mandatory information disclosure. Maxscend said the fund has no involvement in the company’s operations. Before turning to investing, Cai had a strong industry background with experience at the Institute of Computing Technology at Chinese Academy of Sciences and Tianjin Phytium Information Technology, both of which are leading institutes for chip research, according to his official biography. Cai joined Lion Fund in 2017 and became a fund manager two years later, quickly emerging as a star investor for his aggressive strategy in chip stocks. One of his funds, Lion Innovation Drive, expanded from 1.4 billion yuan (US$197.7 million) in March 2019 to over 30 billion yuan by the end of 2021. The assets under Cai’s management continued to skyrocket throughout China’s chip industry boom. Maxscend made an initial public offering in June 2019 at 35.29 yuan per share, a price that would rise ninefold in two years. The bubble started to burst last summer, with many of China’s leading chip firms losing more than half their value in 15 months. The value of Cai’s fund collapsed. The Innovation Drive Fund lost 40 per cent of its value in the first five months of the year, according to financial data service iFind, making it one of the worst-performing funds for the period. Cai’s losses reflect just one of the problems now facing China’s semiconductor industry, as it grapples with US sanctions, weak consumer demand and the corruption probe. How Taiwanese chip tycoon Robert Tsao made an about-turn and angered Beijing Many chip companies are struggling to turn Beijing’s demands for domestic products into sustainable profits. A record 3,470 firms – including those that use the Chinese word for ‘chip’ in their brands or operations – deregistered between January and August , according to statistics from business database platform Qichacha. Volatile performance in chip stocks has remained a persistent headache for retail investors. One such investor surnamed Liu in Changsha, southern Hunan province, said he bought stock in GigaDevice Semiconductor in 2019 because he believed its products would be essential to replacing imported flash memory. Since its July 2021 peak, though, the Shanghai-listed company has lost nearly 60 per cent of its value. Liu said he has sold all of his Chinese chip stocks. “There’s little logic to support price rallies,” he said.