Mainland Chinese stocks have lost about $2.4 trillion in market value since May as investors lose faith that Beijing's AI boom will turn a profit. The STAR 50, an index of large tech and chip companies, has fallen 40% in under four months, erasing about $480 billion, while the CSI 300 entered a bear market on October 22. According to Goldman Sachs, AI companies account for 42% of the market value and 57% of trading in Chinese shares, so a slump in AI stocks drags the whole market down. Factors cited include weak consumer spending, doubts that AI firms can recoup their investment, U.S. curbs on Chinese robots and data center optical parts, and a reported Beijing push for tech giants to shift to homegrown chips and stop buying Nvidia's. A Beijing-based fund manager said the speculative rally has given way to a bubble that is now bursting.
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Chinaartificial intelligencesemiconductorsNVDA
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Related tickers and likely impact
NVDA
▼ Likely negativeNvidia
Relevance: medium
| Market | US stocks |
|---|---|
| Sector | Information Technology |
| Industry | Semiconductors |
| Market cap | $5.1T |
| Close on 10/27/2026 | 217.88 |
| Change that session | +0.87% |
QQQ
▼ Likely negativeInvesco QQQ Trust
Relevance: low
| Market | US stocks |
|---|---|
| Sector | ETF |
| Close on 10/27/2026 | 721.23 |
| Change that session | +1.27% |
Impact is scored by AI from the headline and may be wrong. It is not investment advice.
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