The president of the Tokyo Stock Exchange, Takuo Tsurushima, has said he might resign after admitting a "system irregularity" on the part of his company's computer network failed to stop last week's massive "fat fingered" trade by a Japanese broker. NI_MPU('middle');Mr Tsurushima's offer to quit, which accompanied a hugely humble apology by the TSE, came as the cost of remedying the botched trade soared to about 40.5 billion yen (£189 million). As the exchange offered its "profound" and "deepest regret" about its role in the error, it emerged that the as yet unnamed trader at the brokerage firm responsible, Mizuho Securities, tried to cancel the trade no fewer than four separate times.
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