BEIJING — China’s artificial intelligence investment boom has suffered a dramatic reversal, with the country’s AI and semiconductor stocks losing hundreds of billions of dollars in market value as investors reassess sky-high valuations, uncertain AI demand and growing restrictions on Chinese technology exports.
The STAR50 index, which tracks major artificial intelligence and semiconductor companies listed in China, has fallen about 40% in less than four months, wiping out approximately $480 billion in market value, according to Reuters.
The selloff has also affected the broader Chinese stock market. The CSI300 blue-chip index has dropped about 20% from its June peak, bringing an abrupt halt to a two-year rally that had been supported by economic stimulus measures and Beijing’s efforts to strengthen domestic equity markets.
The reversal has raised questions about whether China's push to make artificial intelligence a major engine of economic growth has produced excessive speculation in technology stocks.
AI Stocks Lose Their Momentum
China's AI investment boom had attracted enormous interest from individual investors, institutional funds and state-backed investors.
Shares of companies associated with artificial intelligence, semiconductors, robotics and data-centre equipment surged as investors anticipated rapid growth in AI demand and stronger government support for China's domestic technology industry.
That enthusiasm pushed valuations far beyond traditional measures of corporate earnings.
At its peak, the STAR50 index traded at nearly 250 times trailing earnings. Although the multiple has fallen sharply during the selloff, it remains around 100 times earnings, compared with roughly 30 times for the Nasdaq 100.
The difference has caused investors to question whether Chinese AI companies still have further room to fall.
There has been no single event identified as the definitive trigger for the selloff. Instead, traders have pointed to several pressures emerging at the same time, including stretched valuations, tax obligations, concerns about future AI demand and the possibility of additional restrictions on Chinese technology exports.
Robotics and Semiconductor Stocks Take Heavy Losses
Some of the companies that attracted the strongest retail-investor enthusiasm have suffered particularly steep declines.
Robotics manufacturer Unitree has lost roughly half of its market value since beginning public trading in August. The company's initial offering attracted extraordinary retail demand, with subscriptions reportedly reaching approximately 8,000 times the number of shares available.
Semiconductor manufacturer CXMT has also fallen more than a quarter over the past month.
Other technology companies have experienced similarly dramatic reversals. MetaX Integrated Circuits and Moore Threads Technology, which recorded gains of approximately 700% and 400%, respectively, on their market debuts last year, have both lost about half their value since July.
Optical-component manufacturers Zhongji Innolight and Eoptolink Technology have fallen by approximately 60% from their respective highs reached in June and July. Their declines have been partly linked to concerns that Washington could restrict their ability to supply U.S. data centres.
The declines have left many individual investors facing substantial losses after buying into the AI rally.
Retail Investors Caught in the Reversal
The selloff has been particularly painful in China because individual investors play a major role in the country's stock market.
One investor interviewed by Reuters, small-business owner Chen Wensheng from Hainan, said he had invested in the rally partly because he believed government support for companies such as Unitree would help sustain their valuations.
Unitree had state-backed funds among its investors, reinforcing the perception among some investors that the company and the broader robotics and AI sector had official backing.
Chen and his friends are now facing losses following the collapse in technology shares.
The experience illustrates one of the risks of government-supported investment themes: investors may interpret policy encouragement as an indication that stock prices will continue rising, even when valuations have moved far beyond underlying earnings.
Beijing’s AI Push Faces a New Test
The stock-market reversal comes at an important moment for China's economic policy.
Beijing has encouraged the development of advanced technology, including artificial intelligence, semiconductors and robotics, as part of its broader effort to reduce dependence on foreign technology and strengthen domestic industries.
The government has also been attempting to develop a more stable, long-term stock market rather than allowing repeated boom-and-bust cycles.
The latest AI selloff complicates that effort.
The two-year market rally had helped strengthen confidence in China's capital markets after years of weakness. But the rapid rise and subsequent decline of AI-related shares has raised concerns that speculative behaviour has once again become excessive.
A Beijing-based fund manager, Dong Baozhen, told Reuters that the market had evolved into a highly speculative rally before the bubble began to burst.
Concerns Over U.S. Technology Restrictions
Another major concern for Chinese AI and semiconductor companies is access to international markets and advanced technology.
The United States has already imposed restrictions on the export of certain advanced semiconductor technologies to China. Investors are increasingly concerned that Washington and other countries could impose additional restrictions affecting Chinese companies and their ability to sell technology or equipment to overseas data centres.
For companies that depend heavily on international customers, such restrictions could limit revenue growth and reduce expectations for future earnings.
The concerns have contributed to the decline in several optical-component and semiconductor companies that had previously been among the market's most popular AI-related investments.
AI Stocks Have Become a Major Part of the Market
The scale of the selloff matters because AI-related companies now represent a significant portion of China's equity market.
According to Goldman Sachs data cited by Reuters, AI stocks account for approximately 42% of market capitalization and 57% of trading turnover across mainland-listed A-shares and Hong Kong-listed H-shares.
That means weakness in AI and technology shares can have a much wider impact than simply affecting a handful of technology companies.
When investors begin selling AI stocks, money can flow into more defensive sectors or out of equities altogether.
The result can be broader market volatility and weaker confidence among retail investors.
Technology Companies Could Face More Difficulty Raising Money
The market downturn could also affect Chinese technology companies that are preparing to raise capital through stock-market listings.
Hong Kong-based asset manager Hong Hao, managing partner and chief investment officer at Lotus Asset Management, told Reuters that the selloff could put a stop to plans by some companies seeking to list their shares.
The reason is straightforward: companies typically want to go public when investor demand and valuations are strong.
A sharp decline in technology stocks makes it more difficult for new companies to justify high valuations and can reduce the amount of money investors are willing to commit to initial public offerings.
The consequences could therefore extend beyond current shareholders to companies that have not yet reached the public markets.
Critics Warn of Distorted Investment
Some market observers argue that the enormous emphasis placed on technology companies has distorted China's stock market.
Leo Wang, a partner at Beijing-based Qianchuang Capital, told Reuters that giving technology companies excessive weight in major indexes can distort the flow of capital.
In his view, the resulting concentration helped create severe bubbles in certain technology sectors while drawing investment away from other parts of the economy.
The concern is that investors may have been buying stocks because of the broader AI narrative rather than because individual companies had demonstrated earnings capable of supporting their valuations.
Some Investors See Opportunities
Despite the dramatic decline, not every investor believes China's AI sector is headed for a prolonged collapse.
Some fund managers argue that the selloff could create opportunities for investors willing to distinguish between companies with strong underlying businesses and those whose valuations were driven primarily by speculation.
Goldman Sachs has included Innolight and CXMT among Chinese AI stocks on a revised recommendation list, while BNP Paribas Securities strategist William Bratton has said the market could offer opportunities for careful investors.
Some international investment funds also continue to hold significant exposure to Chinese equities.
HSBC research cited by Reuters indicated that Asian funds remained overweight on China despite having sold Chinese stocks during the preceding three months.
However, many mainland investors are taking a more cautious approach and waiting for valuations to decline further before returning to technology stocks.
Fear of a Price War
Beyond valuations and export restrictions, investors are also concerned about growing competition among Chinese AI and semiconductor manufacturers.
China has a large manufacturing base and numerous companies attempting to develop domestic alternatives to foreign technology.
While this can accelerate innovation, it can also create intense competition and put pressure on prices and profit margins.
Shanghai-based fund manager Wang Zhuo warned that Chinese AI suppliers and chipmakers could eventually face the same kind of price competition seen across other Chinese manufacturing industries.
If companies compete aggressively for customers by cutting prices, rapid growth in AI adoption may not necessarily translate into equally rapid growth in profits.
That could make today's valuations even harder to justify.
China’s AI Bubble May Be a Warning for Global Markets
The collapse of Chinese AI stocks is also attracting international attention because investors elsewhere are asking whether similar problems could emerge in other markets.
U.S. technology stocks have so far experienced a much smaller decline. The Nasdaq had fallen approximately 6% from its record high reached three weeks earlier, according to Reuters.
That is a significant correction, but it remains far smaller than the 40% decline experienced by China's STAR50 index.
The contrast highlights a key difference between the two markets: Chinese AI stocks had reached extraordinarily high valuations before the selloff, leaving them more vulnerable to a sharp reversal.
The Chinese experience nevertheless provides investors worldwide with a reminder that rapid growth expectations can create significant risks when stock prices rise much faster than corporate earnings.
What Happens Next?
The immediate question for Chinese investors is whether the current decline represents a temporary correction or the beginning of a much longer adjustment.
The STAR50's valuation has fallen substantially from its peak, but at roughly 100 times trailing earnings, it remains expensive compared with major U.S. technology indexes.
That leaves open the possibility of further declines if earnings fail to catch up with share prices or if additional restrictions affect Chinese technology companies.
At the same time, China's government continues to prioritize artificial intelligence, semiconductors and advanced manufacturing as strategic industries.
That means the underlying development of China's AI sector is unlikely to disappear simply because stock prices have fallen.
The more difficult question is whether investors will continue assigning extremely high valuations to companies that are still developing their commercial businesses.
For now, China's AI investment boom has entered a very different phase. The spectacular gains that attracted millions of investors have given way to falling share prices, heavy losses and renewed questions about whether the market moved too far ahead of economic fundamentals.
As one fund manager told Reuters, “all bubbles inevitably burst.”
The challenge for China's technology sector will now be to demonstrate that the long-term economic value of artificial intelligence can justify the enormous expectations that investors once placed on its companies.