Sony share price displayed at NYSE
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Should Sony be broken up?

One of Sony's largest shareholders has suggested it should sell up to 20% of its entertainment business.

Shares in Sony leapt 12% after the hedge fund manager Daniel Loeb suggested that the Japanese giant sell off part of its stake in that unit and use the money to shore up its struggling electronics unit.

His investment company, Third Point, owns more than 6% of Sony's shares.

Samira Hussain reports from New York.

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