A maverick economic policy announcement from a self-styled disruptor plunges the country’s currency into freefall and puts rocket boosters behind the cost of government debt, prompting warnings of an economic nuclear winter and forcing a pretty undignified U-turn.
If, on top of general concern, there has been a nagging sense of deja vu in Britain over the past 24 hours, then the ill-fated 49-day reign of Liz Truss as the UK prime minister may well be to blame.