China's AI Stocks Just Lost $480 Billion as a 40% Crash Raises New Questions About Nvidia

China’s STAR50 index fell about 40% in less than four months, erasing an estimated $480 billion in market value, according to the article. It also reports declining Nvidia shipments and share in China’s data-center AI accelerator market.

• The STAR50 index lost approximately 40% in less than four months, while the CSI 300 fell about 20% from its June peak.· 1 source
• The article says Chinese AI-related shares had made up about 42% of equity-market capitalization and 57% of trading turnover across mainland and Hong Kong markets.· 1 source
• Nvidia’s share of China’s data-center AI accelerator market fell to 34% in the first half of 2026, with shipments down 44% year over year to about 678,000 units.· 1 source