Following the market close on December 12, the sample adjustments for indices such as the SSE 50, STAR 50, and CSI A50 officially took effect. Meanwhile, the periodic sample adjustments for indices including the Shenzhen Component Index and the ChiNext Index will be implemented on December 15.
According to prior announcements, the SSE 50 Index replaced four constituents, the SSE 180 Index replaced seven, the SSE 380 Index replaced 38, the STAR 50 Index replaced two, the CSI 300 Index replaced 11, the CSI 500 Index replaced 50, the CSI 1000 Index replaced 100, the CSI A50 Index replaced four, the CSI A100 Index replaced six, and the CSI A500 Index replaced 20.
Notably, SAIC Motor, China Northern Rare Earth, Huadian New Energy, and Sugon were added to the SSE 50 Index, while ASR Microelectronics and Centec Communications were included in the STAR 50 Index. Huagong Tech, Kuang-Chi Technologies, InnoLight Technology, and Shengyi Technology were added to the CSI A50 Index.
Concurrently, as per announcements by the Shenzhen Stock Exchange and Shenzhen Securities Information Co., periodic sample adjustments for indices such as the Shenzhen Component Index, ChiNext Index, Shenzhen 100, and ChiNext 50 will take effect on December 15. Among them, the Shenzhen Component Index will replace 17 constituents, the ChiNext Index will replace eight, the Shenzhen 100 will replace seven, and the ChiNext 50 will replace five.
For the Shenzhen Component Index, newcomers include Deming Intelligent, Wolong Electric, TOWIN Information, and Sunyard Tech, while China National Accord Medicines, China Tianying, Haide Capital, and Qiaqia Food were removed.
The ChiNext Index will add Shuanglin Auto Parts, Changshan Pharma, Fulin Precision, and Longcore Innovation, while removing OriginWater, Yihua Record, and Tianhua New Energy.
The Shenzhen 100 Index will include Tibet Summit Minerals, Air China Cargo, and Dongshan Precision, while removing Tianshan Materials, Shanxi Coking Coal, and JA Solar Technology, among seven others.
The ChiNext 50 Index will add Changshan Pharma, Philly Crystal, and Longcore Innovation, while removing Tgood Electric, Mango Excellent Media, and CosMX Tech.
This adjustment represents a routine periodic update for index constituents, and ETFs tracking these indices will complete their rebalancing accordingly.
Overall, post-adjustment, the indices have incorporated more leading companies from emerging industries, further enhancing their technological attributes. For instance, after this adjustment, strategic emerging industries now account for 93% of the ChiNext Index's weighting. The new sample companies reported a 13% year-on-year increase in R&D expenses for the first three quarters, with R&D spending representing 5% of revenue—30 of these companies even exceeded 10% in R&D intensity. The ChiNext 50's strategic emerging industries weighting reached 98%, with next-gen IT sectors like AI, chips, and optical modules making up 45%. Similarly, post-adjustment, the combined number of STAR Market and ChiNext constituents in the CSI 300, CSI 500, and CSI 1000 Indices increased by three, six, and nine, respectively, further strengthening their innovation-driven characteristics.
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