Core Viewpoint - The China Securities Index for the medical industry has shown a decline in performance over various time frames, indicating potential challenges within the sector [2]. Group 1: Index Performance - The China Securities Index for the medical industry has decreased by 5.99% over the past month, 1.12% over the past three months, and 6.26% year-to-date [2]. - The index was established with a base date of December 31, 2021, set at 1000.0 points [2]. Group 2: Index Composition - The top ten weighted companies in the index include: - Mindray Medical (14.15%) - Aier Eye Hospital (9.35%) - United Imaging (8.03%) - Aimeike (4.1%) - Huatai Medical (3.87%) - New Industry (3.16%) - Shanghai Pharmaceuticals (3.11%) - Yuyue Medical (3.06%) - Yifeng Pharmacy (2.49%) - Meinian Onehealth (2.45%) [2]. - The index's holdings are primarily listed on the Shenzhen Stock Exchange (56.76%) and the Shanghai Stock Exchange (43.24%) [2]. Group 3: Sector Allocation - The sector allocation within the index is as follows: - Medical Devices: 34.77% - Medical Consumables: 22.92% - Pharmaceutical Commerce: 15.73% - Medical Services: 14.44% - In Vitro Diagnostics: 12.14% [2]. Group 4: Sample Adjustment - The index samples are adjusted biannually, with adjustments occurring on the next trading day following the second Friday of June and December [3]. - Weight factors are generally fixed until the next scheduled adjustment, with temporary adjustments made in response to significant events affecting sample companies [3].

从指数持仓来看，中证全指医疗行业指数十大权重分别为：迈瑞医疗（14.15%）、爱尔眼科 （8.89%）、联影医疗（7.82%）、爱美客（4.05%）、惠泰医疗（4.0%）、鱼跃医疗（3.12%）、上海 医药（3.09%）、新产业（3.03%）、益丰药房（2.65%）、美年健康（2.5%）。 金融界4月22日消息，A股三大指数收盘涨跌不一，中证全指医疗行业指数 (医疗行业，932131)报537.08 点。 数据统计显示，中证全指医疗行业指数近一个月下跌5.24%，近三个月下跌0.28%，年至今下跌5.24%。 据了解，中证全指行业优选指数系列从中证全指行业中选取符合一定流动性与市值筛选条件的上市公司 作为指数样本，以反映各个行业内较具代表性与可投资性的上市公司证券的整体表现。该指数以2021年 12月31日为基日，以1000.0点为基点。 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，当中证全指指数调整样本时，中证全指行业指数 ...

Core Viewpoint - The China Securities Index for the medical industry has shown a slight decline over the past month, quarter, and year-to-date, indicating a stable but slightly negative trend in the sector [2]. Group 1: Index Performance - The China Securities Index for the medical industry is currently at 566.67 points [1]. - Over the past month, the index has decreased by 0.49%, while it has seen a minimal decline of 0.02% over the past three months and year-to-date [2]. Group 2: Index Composition - The top ten weighted companies in the index include: - Mindray Medical (14.12%) - Aier Eye Hospital (8.91%) - United Imaging Healthcare (7.39%) - Aimeike (3.93%) - Huatai Medical (3.48%) - New Industries (3.41%) - Yuyue Medical (3.12%) - Shanghai Pharmaceuticals (3.04%) - Meinian Onehealth (2.57%) - Jiuan Medical (2.39%) [2]. - The index's holdings are primarily listed on the Shenzhen Stock Exchange (57.38%) and the Shanghai Stock Exchange (42.62%) [2]. Group 3: Sector Allocation - The sector allocation within the index is as follows: - Medical Devices: 34.29% - Medical Consumables: 23.16% - Pharmaceutical Commerce: 15.33% - Medical Services: 14.26% - In Vitro Diagnostics: 12.95% [2]. Group 4: Index Adjustment Mechanism - The index samples are adjusted biannually, with adjustments occurring on the next trading day following the second Friday of June and December [3]. - Weight factors are generally fixed until the next scheduled adjustment, with temporary adjustments made in response to significant events affecting sample companies [3].