To the comment that was raised by Colin earlier that this is a facilitation, there is a lot of book entry going on with electronic transactions so that the actual physical location is less important, not unlike now where you can walk into virtually any branch in the country and transact, even if it's not your branch, in terms of transacting basic banking services. So this is very similar and the location of where the trades take place will often be driven by pricing, time zones, a whole range of client preference for access. It is a facilitation that will help access, but it doesn't necessarily have a physical bias toward it.
On February 26th, 2015. See this statement in context.