Bill Ackman's blank-check acquisition company to begin trading on Wednesday after raising up to $4 billion

· *Bill Ackman's blank-check buyout company is set to stop taking investor orders and begin trading on Wednesday.*
· *The special purpose acquisition company is set to break records for IPOs in its category, with plans to offer 200 million units at $20 each. The $4 billion fundraising goal was raised from $3 billion just last...