When investors are worried, they normally rush to the safety of American debt, bidding up the dollar in the process. That’s what happened during past stockmarket slumps. That’s not happening now, though. This time round, investors are eschewing Treasuries. Will Donald Trump’s reckless trade war lead to a dollar crisis?

Neither Melinda nor Bill Gates needs to worry much about money. The billionaire exes are appearing together in an unusual place: on the shelves of book shops. They have each recently written memoirs, which are in some ways similar. But the ways in which the books differ are more telling.