The Methodology of SSE Ocean Economy Index Will Be Amended

In order to improve index representativeness and investability, SSE and CSI decide to amend the index methodology of SSE Ocean Economy Index. The details are as following:

(1)The index universe will be modified as “same as the Universe of the SSE 180 Index”.(2) Add liquidity criteria “securities ranked in the top 90% in the index universe in terms of average daily trading value over the past year in descending order are eligible for inclusion”.(3) The constituent selection method will be modified as “from the eligible securities, select the top 50 securities by the average daily capitalization over the past year from securities which engaged in shipbuilding, shipping, harbor, offshore wind power generation, offshore oil and gas exploration services, ocean fishing and marine bio-products as the constituents”.(4)The weighting method will be modified as“The constituents are weighted by free-float market capitalization.The weight of each constituent from shipbuilding, shipping, harbor, ocean fishing and marine bio-products is capped at 10%,the weight of each constituent in other fields is capped at 3% and its total weight is capped at 20%”.The rest part of index methodology will remain unchanged.

The above amendment will be implemented on Dec 15, 2025. Regarding the amended methodology, please refer to the official website of SSE(www.sse.com.cn) and CSI (www.csindex.com.cn).

Methodology of SSE Ocean Economy Index

Shanghai Stock Exchange

China Securities Index Co., Ltd.

Nov 14, 2025