Bill Ackman's Pershing Square reportedly files to create 'blank check' company worth more than $1 billion
· *Pershing Square Capital founder Bill Ackman filed with US regulators for an initial public offering of a colossal buyout vehicle, CNBC reported Thursday.*
· *The billionaire investor plans to raise at least $1 billion in the IPO, potentially creating the biggest-ever special-purpose acquisition company.*
· *Such firms...