上述编制方案修订将于2025年12月15日实施。 人民财讯11月14日电，上交所发布公告称，为进一步提升指数可投资性，上海证券交易所和中证指数有 限公司决定修订上证海洋经济主题指数的编制方案。 此次修订内容包括：(1)样本空间修订为：同上证180指数的样本空间;(2)新增可投资性筛选规则：过去 一年日均成交金额排名位于样本空间前90%；(3)选样方法修订为：对于样本空间内符合可投资性筛选条 件的证券，从船舶、航运、港口、海上风力发电、海上油气开采与油田服务、远洋捕捞、海洋生物制品 等领域的上市公司证券中，选取过去一年日均总市值排名靠前的50只证券作为指数样本；(4)加权方式 修订为：自由流通市值加权，船舶、航运、港口、远洋捕捞、海洋生物制品领域的单个样本权重不超过 10%，其余单个样本权重不超过3%且合计权重不超过20%。指数编制方案其余部分保持不变。 ...

Core Viewpoint - The Shanghai Stock Exchange and China Securities Index Co., Ltd. have decided to revise the compilation plan of the SSE 380 Index to enhance its investability Group 1: Index Compilation Changes - The sample space for the index will be revised to align with the sample space of the SSE 180 Index [1] - New investability screening criteria will be introduced, requiring a ranking in the top 90% based on average daily trading volume over the past year [1] - ESG screening criteria will be added, excluding listed companies with a China Securities ESG rating of C or below [1] Group 2: Sample Selection and Weighting - The method for selecting index samples will be revised to include securities that are not part of the SSE 180 Index and rank beyond 160 in average total market capitalization over the past year, while selecting those ranked within the top 380 [1] - Weight constraints will be implemented, limiting the weight of any single sample to a maximum of 10% and the combined weight of the top five samples to no more than 40% [1]

Core Viewpoint - The Shenzhen Stock Exchange (SZSE) announced revisions to the ChiNext Index compilation method to enhance investability and introduce an ESG negative screening mechanism, which will exclude stocks rated below B from the index [1][4]. Group 1: Index Compilation Revisions - The revisions include the introduction of an ESG negative screening mechanism to maintain the purity of sample stocks by excluding companies with significant environmental, social, and governance issues [1][4]. - A weight adjustment factor will be implemented to ensure that no single stock's weight exceeds 20% during periodic adjustments, aimed at reducing the influence of individual stocks on the index [1][2]. Group 2: Implications for the ChiNext Index - The ChiNext Index selects 100 stocks with high market capitalization and liquidity from approximately 1,380 listed companies, making inclusion prestigious for those companies [1]. - The introduction of the ESG screening mechanism is expected to enhance the investability of the index and mitigate related investment risks [1]. Group 3: Recommendations for the Shanghai Stock Exchange - The approach taken by the SZSE for the ChiNext Index could serve as a model for revising the Shanghai Composite Index, which currently suffers from distortion due to the overwhelming influence of a few large-cap stocks [4][5]. - To address the distortion in the Shanghai Composite Index, it is suggested to implement a similar exclusion mechanism for poorly rated companies and to limit the weight of individual stocks to a maximum of 1% or even 0.5% [5].