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China Exchanges Overhaul Major Indices to Favor AI and Chip Stocks

Published: Jun. 5, 2026 3:45 a.m. GMT+8

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On June 2, 2026, the three major A-share indexes all closed higher, with total market turnover reaching 2.81 trillion yuan. Photo: VCG

China’s major stock exchanges are overhauling their benchmark indices to add domestic artificial intelligence and semiconductor companies while phasing out traditional consumer electronics manufacturers.

The semi-annual rebalancing, effective June 15, impacts more than a dozen key gauges including the CSI 300, SSE 50, and STAR 50. Passive funds are already injecting hundreds of millions of dollars into newly selected computing and memory chip stocks during the two-week trading window before the changes take effect.

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China’s major stock exchanges are revamping benchmark indices to include domestic AI and semiconductor companies, removing traditional electronics manufacturers, effective June 15.
Passive funds are injecting hundreds of millions into newly selected computing and memory chip stocks, driving short-term price surges like GigaDevice’s 13.3% weekly gain.
Offshore, the Hang Seng Tech Index will add AI firms MiniMax and Zhipu AI on June 8, reflecting the broader push for tech self-reliance.

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Who’s Who

...: {"chinese":"中国主要股指进行半年度调整，纳入人工智能和半导体公司，剔除传统消费电子企业。调整于6月15日生效，涉及沪深300、上证50等。被动基金已在调整窗口期内注入资金。新增标的包括存储芯片制造商，如江波龙、兆易创新等。","english":"China's major stock indices are rebalancing to include AI and semiconductor firms, phasing out consumer electronics. Effective June 15, changes affect CSI 300, SSE 50, and STAR 50. Passive funds are injecting capital, with memory chip makers like Longsys and GigaDevice added."}

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What Happened When

2026：: Shenzhen Longsys Electronics Co. will join the CSI 300, SZSE 100, and CSI A500 indices. GigaDevice Semiconductor Inc. selected for the SSE 50. Biwin Storage Technology Co. joins the CSI A500. Zhejiang Century Huatong Group Co. added to five major onshore indices. Yuanjie Semiconductor Technology Co., VeriSilicon Microelectronics Co., Biwin Storage, Hua Hong Semiconductor Ltd., and Moore Threads secured upgrades to the CSI 500, CSI 300, or STAR 50.

June 1-4, 2026：: GigaDevice Semiconductor Inc. attracted 4 billion yuan ($589 million) in net institutional inflows, surging 13.3% for the week. Shenzhen Techwinsemi Technology Co. Ltd. and China Tungsten and Hightech Materials Co. recorded net inflows of 1.3 billion yuan and 1.1 billion yuan, respectively.

Before June 5, 2026：: Index adjustments are strictly rule-based, prioritizing daily average market capitalization and liquidity over the past year up to June 5, 2026.

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