News Release

Oct. 05, 2020 JPXTSE The Cause and Measure of arrowhead System Failure


TSE would like to express our sincerest apologies to investors and the people related to the stock market for any inconvenience caused by the failure of the equity trading system, arrowhead, on October 1, 2020.

Because the direct cause of the failure has been identified, we have already taken actions on the system side.
For the details, please refer to the attached files.

The Cause of the Recent Failure in arrowhead icon-pdf
(Ref.) Internal Structure of Shared Disk Device icon-pdf


Tokyo Stock Exchange, Inc.