But deadlines also rush people, often into a frenzy (I.e. Auctions); and the uncertainty of what will happen overnight could cause crashes to be more severe. I

But deadlines also rush people, often into a frenzy (I.e. Auctions); and the uncertainty of what will happen overnight could cause crashes to be more severe. It may be that leaving markets open overnight would calm trading all day. I am not sure either way, but it seems that 24/7 trading would be worth a try.