@Numero:US hedge fund billionaire sells Netflix stake at huge loss.Bill Ackman’s Pershing Square fund dumped his 7% stake in Netflix for a loss of about $400m after the streaming service’s value plunges, reversing his bullish position in the streaming giant after it reported an outflow of more than 200,000 subscribers.The share drop wiped about $50bn off of Netflix’s market value.The New York-based investor bought more than $1bn of Netflix shares in January, despite grim forecasts about the company’s subscription levels. Ackman said at the time that the subsequent drop in the share price had presented an “attractive” opportunity for his Pershing Square fund.But Ackman made a U-turn overnight after shares in the online streaming platform plunged more than 35% in reaction to news that Netflix had lo