Why, between the dark pools and the public exchanges, were there nearly sixty different places, most of them in New Jersey, where you could buy any l… - Michael Lewis

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Why, between the dark pools and the public exchanges, were there nearly sixty different places, most of them in New Jersey, where you could buy any listed stock? Why did the public exchanges fiddle with their own pricing so often—and why did you get paid by one exchange to do exactly the same thing for which another exchange might charge you?