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Markets

Tokyo bourse blames IP address error for trading outage

Simple setup mistake at brokerage server seen as cause of Oct. 9 glitch

The Tokyo Stock Exchange is set to lay out suggestions for preventing a crash like the one earlier this month in a report due Tuesday.
The Tokyo Stock Exchange is set to lay out suggestions for preventing a crash like the one earlier this month in a report due Tuesday.   © Reuters

TOKYO -- The connection failure that froze some trading at the Tokyo Stock Exchange earlier this month was triggered by incorrect IP addresses, the bourse is set to report in an official review on Tuesday.

The outage at 7:31 a.m. on Oct. 9 occurred when multiple Internet Protocol addresses -- similar to a telephone number or street address that identifies computers -- were set instead of one, at a brokerage's server. That caused the TSE to be flooded with over 1,000 times the data it normally sends, the report to the Financial Services Agency will say.

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