TSE’s Osaka Deal Marred by Share Fall, Regulator Scolding

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The Tokyo Stock Exchange Group Inc.’s purchase of its Osaka rival is off to a rocky start.

Just one day after winning control of Osaka Securities Exchange Co., the president of Japan’s biggest bourse and three other executives had their pay docked after the company was reprimanded by regulators for computer errors that disrupted trading twice in the last seven months. Shares of the Osaka exchange plunged by a record 16 percent yesterday amid speculation the merger will hurt profit.