One of the problems with this whole issue is that people are prone to looking at tl;dr's. Your comment assumes that front-running is occurring, which is not wh

One of the problems with this whole issue is that people are prone to looking at tl;dr's. Your comment assumes that front-running is occurring, which is not what's happening. Would you rather the debate go to: whether everyone should trade based on the SIP? But then: - What happens when the SIP goes down? Should the US markets shut down? - What is the motivation for innovation if everyone uses the SIP? One advantage of multiple markets is that they are also competing with each other to improve in terms of technology, and rates. - Why is it better to trade in a world with less information?