中证空天一体军工指数下跌0.82%，前十大权重包含海格通信等

Core Viewpoint - The China Securities Index for Aerospace and Defense (空天军工指数) has shown a slight decline recently, with a year-to-date decrease of 0.11%, despite a 3.76% increase over the past month [1]. Group 1: Index Performance - The Aerospace and Defense Index opened lower and experienced a fluctuation, closing down 0.82% at 1906.16 points, with a trading volume of 15.177 billion yuan [1]. - Over the last three months, the index has increased by 0.56% [1]. Group 2: Index Composition - The index includes leading companies related to the aerospace and defense strategy, covering sectors such as aircraft, power and control systems, early warning systems, weapon systems, C4ISR systems, military digitalization, and aerospace materials [1]. - The index is based on a starting point of 1000.0 points as of June 30, 2011 [1]. Group 3: Top Holdings - The top ten weighted companies in the index are: AVIC Shenyang Aircraft (8.08%), AVIC Optoelectronics (7.58%), Aero Engine Corporation of China (6.91%), AVIC Xi'an Aircraft (5.2%), AVIC Aircraft (4.24%), Haige Communications (3.82%), Aerospace Electronics (3.61%), AVIC Chengfei (3.6%), Filihua (3.54%), and Western Superconducting (3.5%) [1]. Group 4: Market and Sector Breakdown - The index's holdings are primarily listed on the Shanghai Stock Exchange (53.13%) and Shenzhen Stock Exchange (46.87%) [2]. - The industry composition of the index includes: Industrial (74.33%), Materials (14.08%), Communication Services (6.73%), and Information Technology (4.85%) [2]. Group 5: Index Adjustment - The index samples are adjusted biannually, with adjustments occurring on the next trading day after the second Friday of June and December [2]. - Weight factors are generally fixed until the next scheduled adjustment, with special circumstances allowing for temporary adjustments [2]. Group 6: Related Funds - Public funds tracking the Aerospace and Defense Index include Penghua China Securities Aerospace and Defense C and Penghua China Securities Aerospace and Defense A [3].