News Release

Apr. 22, 2026 TSE Public Release of the Report From the Working Group on Trading Rules

The Tokyo Stock Exchange Inc. (TSE) has been working to improve its trading rules in order to enhance the convenience and transparency of the cash market, including the introduction of a closing auction session, the extension of trading hours, and optimization of tick sizes.
With a certain amount of time having passed since the introduction of these rules, TSE established a Working Group composed of a variety of market stakeholders last October. This group discussed the following topics based on evaluations of the rules' effectiveness since introduction, feedback from market stakeholders, and other information.

<Topics Discussed>
①Improving the Closing Auction Session
②Further Optimization of Tick Sizes

Based on the discussions held within the Working Group, we hereby publish the "Report From the Working Group on Trading Rules" as set out below.