If as the Remainers now say, the UK's hasn't exited the EU yet, and the (presumably) negative effects of Brexit will happen then, what of all the claims that even calling the referendum would cause a crash?
As a commentator at Bill Mitchell's blog puts it:
"No, no, no. You cannot have it both ways. You cannot simultaneously have an orgy of propaganda and misinformation on a daily basis by the mainstream media outlets and the ‘serious’ financial press about the already occurring deleterious effects “of Brexit” (even though it has not (yet) taken place) AND claim that the ‘serious’ argument in favor of remain by ‘serious’ people (economists, politicians, financiers) was ONLY about what would happen AFTER the actual official exit of the U.K. from the EU AND assuming that the U.K. government will take no appropriate fiscal and monetary actions (i.e. expansionary ones) to counter-act any reduced injections or increased leakages that may result from no longer being a member of the EU."