上交所和中证指数公司决定修订上证海洋经济主题指数编制方案

Core Viewpoint - The Shanghai Stock Exchange and China Securities Index Co., Ltd. announced revisions to the compilation scheme of the Shanghai Ocean Economy Theme Index to enhance its investability [1] Group 1: Revision Details - The sample space will be revised to align with the sample space of the SSE 180 Index [1] - New investability screening criteria will be introduced, requiring a daily average trading amount ranking within the top 90% of the sample space over the past year [1] - The selection method will be updated to choose 50 securities from the sample space that meet the investability criteria, focusing on companies in sectors such as shipping, maritime transport, ports, offshore wind power, offshore oil and gas extraction, deep-sea fishing, and marine biological products [1] Group 2: Weighting and Implementation - The weighting method will be changed to free-float market capitalization, with individual sample weights in shipping, maritime transport, ports, and deep-sea fishing not exceeding 10%, while other individual sample weights will not exceed 3%, and the total weight of these samples will not exceed 20% [1] - The revised compilation scheme is set to be implemented on December 15, 2025 [1]