Aier(SZ:300015) Sou Hu Cai Jing·2025-07-21 14:44Core Viewpoint - The China Securities Medical Advantage 50 Index has shown a recent upward trend, reflecting the performance of leading companies in the medical sector, despite a year-to-date decline. Group 1: Index Performance - The China Securities Medical Advantage 50 Index has increased by 5.31% over the past month and by 5.29% over the last three months, but has decreased by 2.32% year-to-date [2] - The index was established on December 31, 2015, with a base value of 1000.0 points [2] Group 2: Index Composition - The top ten weighted companies in the index are: Aier Eye Hospital (9.85%), Huatai Medical (9.05%), New Industry (6.52%), Aimeike (4.97%), United Imaging (4.72%), Mindray Medical (4.69%), Yuyue Medical (3.56%), Furuide (3.34%), Jianfan Bio (3.21%), and Lepu Medical (3.16%) [2] - The index's holdings are primarily listed on the Shenzhen Stock Exchange (60.14%) and the Shanghai Stock Exchange (39.86%) [2] Group 3: Industry Breakdown - The index's sample companies are categorized as follows: medical consumables (35.25%), medical devices (29.57%), in vitro diagnostics (25.33%), and medical services (9.85%) [2] - The index samples are adjusted biannually, with adjustments occurring on the next trading day after the second Friday of June and December [3]