It's no great leap of faith to think that some US markets could be taken offshore because of a FTT. Perhaps use Bitcoin as the base currency. Don't laugh, with technology moving at the pace it is, all sorts of things are possible. Why can't Citadel for example setup an offshore exchange for retail, make the markets (without FTT) and then everyone can day trade all day everyday. Yes, there would likely be regulatory hurdles but the point is that with ever better tech markets are pretty much global right now, it doesn't matter where you earn that $100+ profit.
Then we have other countries that don't implement a FTT. The UK for example, with Brexit looming, could do with a big shot in the arm. Perhaps that could soak up some or even much of the business done on domestic US Exchanges. That would also piss off Brussels as an added bonus because they hate the semi-stranglehold London has over the financial markets.
Moral of the story, when there's big money up for grabs somebody is going to step up and find creative ways to operate both for them and their clients.
Then we have other countries that don't implement a FTT. The UK for example, with Brexit looming, could do with a big shot in the arm. Perhaps that could soak up some or even much of the business done on domestic US Exchanges. That would also piss off Brussels as an added bonus because they hate the semi-stranglehold London has over the financial markets.
Moral of the story, when there's big money up for grabs somebody is going to step up and find creative ways to operate both for them and their clients.