TOKYO (Reuters) -- Nissan Motor shares jumped as much as almost 21% on Tuesday after a filing showed activist investor Effissimo Capital Management had taken a stake in the struggling Japanese automaker.
In a regulatory filing on Monday, Nissan disclosed Cayman Islands-registered ECM Master Fund as a shareholder with a 2.5% stake as of end-September. ECM Master Fund is affiliated with Effissimo, according to Securities and Exchange Commission filings.


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