Early in my career, I had to babysit our FX quoting app through the July 2015 leap second. And some things do trade 24/7 (though I wish they wouldn't, one auct

Early in my career, I had to babysit our FX quoting app through the July 2015 leap second. And some things do trade 24/7 (though I wish they wouldn't, one auction per minute during US east coast business hours would be totally sufficient for most US markets).