Group 1 - The Shanghai Composite Index opened lower but rose throughout the day, with the CSI 300 Utilities (secondary industry) index reported at 2669.83 points [1] - The CSI 300 Utilities index has decreased by 1.10% over the past month, increased by 5.80% over the past three months, and has declined by 1.36% year-to-date [1] - The CSI 300 index categorizes its 300 sample stocks into 11 primary industries, 35 secondary industries, over 90 tertiary industries, and more than 200 quaternary industries, providing a comprehensive analysis tool for investors [1] Group 2 - The top ten holdings in the CSI 300 Utilities index are: Changjiang Electric (49.31%), China Nuclear Power (10.16%), Three Gorges Energy (8.03%), Guodian Power (5.52%), State Power Investment (4.65%), Huaneng International (4.17%), Chuanwei Energy (4.09%), China General Nuclear Power (3.81%), Zhejiang Energy (2.82%), and Huadian International (2.5%) [1] - The market share of the CSI 300 Utilities index is dominated by the Shanghai Stock Exchange at 95.87%, while the Shenzhen Stock Exchange accounts for 4.13% [2] - In terms of industry composition, hydropower constitutes 60.36%, thermal power 15.01%, nuclear power 13.97%, wind power 8.36%, and gas power 2.31% of the index [2] Group 3 - The index samples are adjusted biannually, with adjustments implemented on the next trading day following the second Friday of June and December each year [2] - Weight factors are adjusted in accordance with the regular sample adjustments, which occur at the same time as the index sample adjustments [2] - Temporary adjustments to the index samples occur when the CSI 300 index undergoes changes, and special events affecting sample companies may also lead to corresponding adjustments in the CSI 300 industry index [2]

Core Points - The Shanghai Composite Index opened lower and the CSI 300 Utilities Index reported at 2662.05 points [1] - The CSI 300 Utilities Index has increased by 5.17% over the past month, 3.49% over the past three months, and has decreased by 1.65% year-to-date [1] Index Composition - The CSI 300 Utilities Index is composed of 11 primary industries, 35 secondary industries, over 90 tertiary industries, and more than 200 quaternary industries [1] - The top ten weights in the CSI 300 Utilities Index are: - Changjiang Electric Power (48.06%) - China Nuclear Power (10.21%) - Three Gorges Energy (8.19%) - Guodian Power (5.41%) - State Power Investment Corporation (4.87%) - Sichuan Investment Energy (4.38%) - Huaneng International (4.22%) - China General Nuclear Power (3.74%) - Zhejiang Energy Power (3.11%) - Huadian International (2.71%) [1] Market Distribution - The market distribution of the CSI 300 Utilities Index shows that the Shanghai Stock Exchange accounts for 95.91% and the Shenzhen Stock Exchange accounts for 4.09% [2] - In terms of industry composition within the index: - Hydropower accounts for 59.59% - Thermal power accounts for 15.45% - Nuclear power accounts for 13.96% - Wind power accounts for 8.54% - Gas accounts for 2.47% [2] Sample Adjustment - The index samples are adjusted every six months, with adjustments implemented on the next trading day following the second Friday of June and December each year [2] - Weight factors are generally fixed until the next scheduled adjustment, with temporary adjustments made in response to changes in the CSI 300 Index samples [2]

Core Viewpoint - The Shanghai Composite Index opened lower and fluctuated, with the CSI 300 Utilities Index reported at 2638.18 points, reflecting a 3.14% increase over the past month, a 4.64% increase over the past three months, and a 2.53% decline year-to-date [1] Group 1: Index Performance - The CSI 300 Utilities Index is categorized into 11 primary industries, 35 secondary industries, over 90 tertiary industries, and more than 200 quaternary industries, providing a comprehensive analysis tool for investors [1] - The index is based on a sample of 300 stocks from the CSI 300, with a base date of December 31, 2004, and a base point of 1000.0 [1] Group 2: Index Holdings - The top ten weights in the CSI 300 Utilities Index are: - Changjiang Electric Power (48.17%) - China Nuclear Power (10.24%) - Three Gorges Energy (8.19%) - Guodian Power (5.45%) - State Power Investment (4.79%) - Sichuan Investment Energy (4.38%) - Huaneng International (4.21%) - China General Nuclear Power (3.7%) - Zhejiang Energy Power (3.12%) - Huadian International (2.67%) [1] Group 3: Market Composition - The market composition of the CSI 300 Utilities Index shows that the Shanghai Stock Exchange accounts for 95.94%, while the Shenzhen Stock Exchange accounts for 4.06% [2] - In terms of industry composition, hydropower constitutes 59.60%, thermal power 15.45%, nuclear power 13.94%, wind power 8.55%, and gas power 2.46% [2] Group 4: Sample Adjustment - The index samples are adjusted biannually, with adjustments implemented on the next trading day following the second Friday of June and December each year [2] - Weight factors are generally fixed until the next scheduled adjustment, with temporary adjustments made in response to changes in the CSI 300 Index samples or special events affecting sample companies [2]

金融界4月18日消息，A股三大指数收盘涨跌不一，沪深300公用事业(二级行业)指数 (300公用(二级)， L11525)报2626.36点。 数据统计显示，沪深300公用事业(二级行业)指数近一个月上涨4.97%，近三个月上涨2.36%，年至今下 跌2.97%。 从沪深300公用事业(二级行业)指数持仓的市场板块来看，上海证券交易所占比95.85%、深圳证券交易 所占比4.15%。 从沪深300公用事业(二级行业)指数持仓样本的行业来看，水电占比59.29%、火电占比15.45%、核电占 比14.23%、风电占比8.62%、燃气占比2.40%。 资料显示，指数样本每半年调整一次，样本调整实施时间分别为每年6月和12月的第二个星期五的下一 交易日。权重因子随样本定期调整而调整，调整时间与指数样本定期调整实施时间相同。在下一个定期 调整日前，权重因子一般固定不变。遇临时调整时，当沪深300指数调整样本时，沪深300行业指数样本 随之进行相应调整。在样本公司有特殊事件发生，导致其行业归属发生变更时，将对沪深300行业指数 样本进行相应调整。当样本退市时，将其从指数样本中剔除。样本公司发生收购、合并、分拆等情形的 ...

从指数持仓来看，沪深300公用事业(二级行业)指数十大权重分别为：长江电力（48.37%）、中国核电 （10.28%）、三峡能源（8.33%）、国电电力（5.37%）、国投电力（4.72%）、川投能源（4.44%）、 华能国际（4.11%）、中国广核（3.76%）、浙能电力（3.02%）、华电国际（2.54%）。 从沪深300公用事业(二级行业)指数持仓的市场板块来看，上海证券交易所占比95.90%、深圳证券交易 所占比4.10%。 从沪深300公用事业(二级行业)指数持仓样本的行业来看，水电占比59.79%、火电占比15.04%、核电占 比14.04%、风电占比8.68%、燃气占比2.45%。 资料显示，指数样本每半年调整一次，样本调整实施时间分别为每年6月和12月的第二个星期五的下一 交易日。权重因子随样本定期调整而调整，调整时间与指数样本定期调整实施时间相同。在下一个定期 调整日前，权重因子一般固定不变。遇临时调整时，当沪深300指数调整样本时，沪深300行业指数样本 随之进行相应调整。在样本公司有特殊事件发生，导致其行业归属发生变更时，将对沪深300行业指数 样本进行相应调整。当样本退市时，将其从指数 ...