Shares in the computer game and console manufacturer, Nintendo plunged as much as 18 percent following a profit warning from the company on Friday.
The maker of Super Mario and Donkey Kong had initially forecast an operating profit of 100 billion yen, or 707 million euros, but instead posted losses of 35 billion yen, that is 247 million euros.
Nintendo blamed the loss on weaker than expected sales of its Wii U games console.
Nintendo was hoping the Wii U would match the success of its original Wii console, which drove its share price up to an all time high in 2007.
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