JAPAN: JPX Announces the Launch of Real-time Calculation of Prime Standard and Growth Market Indices

Thursday May 12 2022

On 11^th May 2022, the Japanese Exchange Group (JPX) Market Innovation & Research, Inc. (JPXI) announced the launch of real-time calculation for the Tokyo Stock Exchange Prime Market Index, Tokyo Stock Exchange Standard Market Index and Tokyo Stock Exchange Growth Market Index, which are currently calculated on an end-of day basis.

The market segment indices will be calculated every 15 seconds instead of the current calculation of once a day and will be disseminated via the market information system (FLEX).

• FLEX connection specifications and “Policies Regarding Usage of Market Information” are scheduled to be revised in line with this.

The market segment indices, which launched in line with transition to the new market segments on April 4^th, 2022, have for the time been calculated and disseminated only daily with a closing price, with the intention that they would be used as statistical indicators. In this regard they have received many requests from market participants and investors to be able to track the price movements of each market during trading hours.

Based on these requests, they have decided to change the calculation frequency of the market segment indices to a real-time basis from the current end-of day basis in order to further enhance their functionality as statistical indicators, as well as reference indicators for investment decisions.

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