Billionaire Bill Ackman's blank-check company pops 9% in its trading debut

· *Bill Ackman's blank-check company, Pershing Square Tontine Holdings, started trading Wednesday on the New York Stock Exchange under the ticker "PSTH."*
· *The company popped as much as 9% in its trading debut. *
· *"What's new in our structure is it's the first SPAC where we're taking no compensation," Ackman told CNBC...