www.jpx.co.jp/news/6030/20230714-01.html
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合併に伴う株価指数算出上の取扱いについて（コンフィデンス） | 日本取引所グループ
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This page announces the treatment of stock price index calculations for TOPIX and TOPIX sub-indexes following the merger between Confidence (7374) and Interworks (6032), effective August 1, 2023. Published by Japan Exchange Group as official market news, it details changes in index calculation methods due to the merger. The JPX Research Institute's Index Business Department handles inquiries. The announcement provides guidance on how the merger will affect index composition and calculation procedures.
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