After six weeks of nonsense, the Tariff Man became the Deal Man. First the UK and then China shook his chastened hand, and his glitzy jaunt around the Middle East was all about The Deal. Notwithstanding his latest threat to the EU, investors have broadly recouped their losses and are left struggling to make sense of the wrenching ride. Of course, stock-markets have no ideology. Governments outline their policies, and markets adapt accordingly. As Michael Corleone told his doomed older brother in The Godfather: ‘it’s not personal Sonny, it’s strictly business.’   That said, for centuries policymakers and investors have broadly…