COVID-19 is still raging, with little sign of coming under control. The economy is already a tenth smaller than it was at the start of the year. Joblessness is soaring. And the budget deficit? Don’t even ask. But, hey, perhaps we shouldn’t worry about any of that. As the President of the United States keeps pointing out, the stock market is doing great, and, in his opinion, anyway, that means America, to borrow the kind of slogan that fits neatly onto a baseball cap, is great again as well.