AnnouncementsJapan's benchmark index introduces new constituent selection rulesChanges to the Nikkei 225 stock index, effective Oct. 1, follow a consultation and will be reflected in this autumn's review.July 9, 2026 17:58 JSTTOKYO -- Nikkei announced on Thursday that it will revise the rules governing its Nikkei 225 index, creating a new "information and communications" sector for constituent selection. The company will also rename the "communications" category in the Nikkei industry classification to "information and communications," move IT-related stocks from the services category to the new industry grouping, and introduce rules for replacing constituents within the same sector.Under the constituent selection methodology for the Nikkei 225 -- a stock index of Japan's leading 225 compa