China’s STAR50 Index Sheds $480 Billion After Falling 40% in Less Than Four Months
Key Facts
China’s STAR50 Index, which includes AI and semiconductor companies, fell 40% in less than four months, wiping about $480 billion off its market value, according to a Reuters report. The decline puts losses in the index and its constituents at the forefront of the sell-off, rather than attributing them to all AI stocks in China. Reuters said elevated valuations collapsed under pressure from concerns about AI demand and Chinese export restrictions. Concerns about demand growth thus converged with export curbs, as the decline brought company valuations back into focus. The loss represents part of the index’s own decline over the period cited, not a tally for an entire sector.
The drop halted a two-year rally that began after promises of economic stimulus lifted stocks, according to Reuters. Dong Baozhen, a Beijing-based fund manager, described the market’s trajectory, saying it "later developed into a wild speculative rally." The description places the earlier rally in the context of the market’s shift to speculative gains, before elevated valuations became a source of pressure. The two-year rally ended as the STAR50 declined, the report said. The contrast between the prolonged rise and the rapid fall shows how the index’s direction changed in less than four months.
In the economic backdrop, China’s Ministry of Commerce said the value of utilized foreign investment reached 5488.1 billion yuan in January–September 2026, down 4.3% year on year. The pace of decline narrowed from a 5.3% drop in the first eight months of the year. On a monthly basis, utilized foreign investment rose 2.5% year on year in September, the ministry said. The figures combine a cumulative decline over nine months with an improvement in the latest monthly reading, showing how the trend differs depending on the comparison period. They are data on foreign investment in China, part of the economic backdrop to the technology stock decline.
Data from the National Bureau of Statistics showed the manufacturing purchasing managers’ index at 50.1% in September, up 0.3 percentage points from August and back in expansion territory. The non-manufacturing business activity index for services stood at 50.2%, up 1.2 percentage points from the previous month. The composite PMI for output came in at 50.7%, up 1.2 percentage points from August, indicating expansion in overall production and operating activity. The three readings present a varied picture depending on the measure, but all rose month on month in September. These are readings published for the month, not the date of a forthcoming release.
On the production side, industrial value added in high-tech manufacturing grew 14.3% year on year in the first nine months of 2026, according to the National Bureau of Statistics. That was above growth in value added across all industrial enterprises above the designated size, which was 5.3% over the same period. The gap between the rates puts high-tech manufacturing performance above broader industrial output growth over the nine months. The figures provide context on activity in the technology sector alongside the decline in an index that includes AI and semiconductor companies. They measure industrial output growth, while the STAR50 decline measures stock performance and market value.
In the October 27 session, the Shanghai Composite fell 0.1% to 3692.58, while the Hang Seng Index lost 0.2% to 23174.44, according to the Associated Press. Both indexes posted modest losses in the session, despite gains in most Asian stocks. More broadly, the agency said borrowing costs for building data centers and buying AI chips, along with concern about high prices after a rally that lasted years, weighed on sector stocks. The agency said earnings reports from major technology companies this week will offer indications of the scale of AI spending and whether it is delivering the promised profits and productivity. Alphabet and Microsoft were scheduled to report results Wednesday, and Amazon on Thursday.