The Tokyo Stock Exchange said it suffered a trading system glitch Tuesday morning that left some brokerages unable to make orders through the bourse.
According to sources close to the matter, an extraordinary amount of data erroneously sent by Merrill Lynch Japan Securities Co. caused the trouble.
The Tokyo bourse said one of the four lines in its trading system linking it and securities firms went down around 7:30 a.m. and remained offline throughout the day.