The US dollar is hitting new 12-year highs almost daily, while the euro seems to be plunging inexorably to below dollar parity. Currency movements are often described as the most unpredictable of all financial variables; but recent events in foreign-exchange markets seem, for once, to have a fairly obvious explanation – one that almost all economists and policymakers accept and endorse. French President François Hollande, for one, has ecstatically welcomed the plunging euro: “It makes things nice and clear: one euro equals a dollar," he told an audience of industrialists. But it is when things seem “nice and c ... (full story)