--- title: "The regular adjustment plan for the sample of indices such as the CSI 300 has been released and will take effect after the market closes on June 12" type: "News" locale: "en" url: "https://longbridge.com/en/news/288054083.md" description: "China Securities Index Co., Ltd. has decided to adjust the sample stocks of the CSI 300, CSI 500, CSI 1000, and other indices after the market closes on June 12, 2026. The CSI 300 index will replace 19 sample stocks, the CSI 500 will replace 50, and the CSI 1000 will replace 100, with other indices also being adjusted accordingly. This adjustment will increase the number and weight of sample stocks in sectors such as information technology, communication services, and industrials, promoting the indices to better serve national strategies" datetime: "2026-05-29T10:43:02.000Z" locales: - [zh-CN](https://longbridge.com/zh-CN/news/288054083.md) - [en](https://longbridge.com/en/news/288054083.md) - [zh-HK](https://longbridge.com/zh-HK/news/288054083.md) --- # The regular adjustment plan for the sample of indices such as the CSI 300 has been released and will take effect after the market closes on June 12 According to news from China Securities Index Co., Ltd. on May 29, based on index rules and after review by the Index Expert Committee, China Securities Index Co., Ltd. has decided to adjust the sample stocks of the CSI 300, CSI 500, CSI 1000, CSI A50, CSI A100, and CSI A500 indices, effective after the market closes on June 12, 2026. Among them, the CSI 300 index will replace 19 sample stocks, the CSI 500 index will replace 50 sample stocks, the CSI 1000 index will replace 100 sample stocks, the CSI A50 index will replace 5 sample stocks, the CSI A100 index will replace 9 sample stocks, and the CSI A500 index will replace 34 sample stocks. According to index rules and after review by the Index Expert Committee, the CSI 300 index will replace 19 sample stocks, including Huagong Technology (000988.SZ) and Jiangbolong (301308.SZ); the CSI 500 index will replace 50 sample stocks, including Yuanjie Technology (688498.SH) and Demingli (001309.SZ); the CSI 1000 index will replace 100 sample stocks, including Juguang Technology (688167.SH) and Tengjing Technology (688195.SH); the CSI A50 index will replace 5 sample stocks, including Sungrow Power (300274.SZ) and China Shipbuilding (600150.SH); the CSI A100 index will replace 9 sample stocks, including Xinyi Sheng (300502.SZ) and Shaanxi Coal and Chemical Industry (601225.SH); the CSI A500 index will replace 34 sample stocks, including Jiangbolong and Baiwei Storage (688525.SH). In addition to the indices mentioned above, other indices will also undergo corresponding adjustments. After this sample adjustment, the number and weight of sample stocks in the information technology, communication services, and industrial sectors have generally increased. The A series indices have a more balanced industry allocation compared to traditional broad-based indices, further enhancing the content of new productive forces, which helps the indices serve national strategies and guide resource allocation. In the CSI 300 index, the number of sample stocks in the information technology and communication services sectors increased by 4 and 3, respectively, with weights rising by 1.28% and 0.16%. In the CSI 500 index, the number of sample stocks in the industrial sector increased by 2, with weight rising by 0.61%. In the CSI 1000 index, the number of sample stocks in the industrial sector increased by 8, with weight rising by 1.45%. After the adjustment, the total number of sample stocks in the STAR Market and ChiNext for the three indices remains unchanged, increases by 10, and increases by 4, with weights of 27.30%, 36.94%, and 39.65%, respectively, further enhancing the attributes of science and innovation. The A series indices respond to market changes with "balance," with the weights of the information technology and communication services sectors increasing significantly in the CSI A50, CSI A100, and CSI A500 indices; in the CSI A500 index, the weight of emerging industry sample stocks further increases to 59.28%. After the adjustment, the CSI A50, CSI A100, and CSI A500 indices cover 30, 27, and 35 CSI secondary industries, as well as 50, 44, and 89 CSI tertiary industries, respectively, achieving coverage of quality leaders in subdivided industries In terms of market capitalization coverage, the total market capitalization coverage rates of the CSI 300, CSI 500, and CSI 1000 indices are 48.28%, 15.76%, and 13.74%, respectively. The total market capitalization coverage rates of the CSI A50, CSI A100, and CSI A500 indices are 15.69%, 24.89%, and 50.63%, respectively. From a fundamental perspective, the operating income of the CSI 300, CSI 500, and CSI 1000 indices in the 2025 annual report accounts for 59.22%, 14.56%, and 11.50% of the A-share market, while the net profit accounts for 86.21%, 8.93%, and 5.94%, respectively. The operating income of the CSI A50, CSI A100, and CSI A500 indices in the 2025 annual report accounts for 17.96%, 28.01%, and 61.51% of the A-share market, while the net profit accounts for 23.93%, 34.97%, and 70.67%, respectively. ![Screenshot_29-5-2026_183245_oss-ch.csindex.com.cn.jpeg](https://imageproxy.pbkrs.com/https://img.zhitongcaijing.com/image/20260529/1780051048826957.jpeg?x-oss-process=image/auto-orient,1/interlace,1/resize,w_1440,h_1440/quality,q_95/format,jpg) ### Related Stocks - [000852.CN](https://longbridge.com/en/quote/000852.CN.md) - [399905.CN](https://longbridge.com/en/quote/399905.CN.md) - [399300.CN](https://longbridge.com/en/quote/399300.CN.md) - [000300.CN](https://longbridge.com/en/quote/000300.CN.md) - [000905.CN](https://longbridge.com/en/quote/000905.CN.md) - [515310.CN](https://longbridge.com/en/quote/515310.CN.md) - [03005.HK](https://longbridge.com/en/quote/03005.HK.md) - [03133.HK](https://longbridge.com/en/quote/03133.HK.md) - [03188.HK](https://longbridge.com/en/quote/03188.HK.md) - [510500.CN](https://longbridge.com/en/quote/510500.CN.md) - [561550.CN](https://longbridge.com/en/quote/561550.CN.md) - [159629.CN](https://longbridge.com/en/quote/159629.CN.md) - [512100.CN](https://longbridge.com/en/quote/512100.CN.md) - [159845.CN](https://longbridge.com/en/quote/159845.CN.md) - [159633.CN](https://longbridge.com/en/quote/159633.CN.md) - [159337.CN](https://longbridge.com/en/quote/159337.CN.md) - [561280.CN](https://longbridge.com/en/quote/561280.CN.md) - [563750.CN](https://longbridge.com/en/quote/563750.CN.md) - [510300.CN](https://longbridge.com/en/quote/510300.CN.md) - [02846.HK](https://longbridge.com/en/quote/02846.HK.md) - [560010.CN](https://longbridge.com/en/quote/560010.CN.md) - [510580.CN](https://longbridge.com/en/quote/510580.CN.md) - [000853.CN](https://longbridge.com/en/quote/000853.CN.md) - [000854.CN](https://longbridge.com/en/quote/000854.CN.md) - [000904.CN](https://longbridge.com/en/quote/000904.CN.md) - [000988.CN](https://longbridge.com/en/quote/000988.CN.md) - [301308.CN](https://longbridge.com/en/quote/301308.CN.md) - [688498.CN](https://longbridge.com/en/quote/688498.CN.md) - [001309.CN](https://longbridge.com/en/quote/001309.CN.md) - [688167.CN](https://longbridge.com/en/quote/688167.CN.md) - [688195.CN](https://longbridge.com/en/quote/688195.CN.md) - [300274.CN](https://longbridge.com/en/quote/300274.CN.md) - [600150.CN](https://longbridge.com/en/quote/600150.CN.md) - [300502.CN](https://longbridge.com/en/quote/300502.CN.md) - [601225.CN](https://longbridge.com/en/quote/601225.CN.md) - [688525.CN](https://longbridge.com/en/quote/688525.CN.md)