LONDON (Reuters) - The world economy is caught in a "delicate equilibrium" between stabilisation and a further downturn, according to Bank of England Governor Mark Carney, and that balance could look even shakier over the next few days.Early measures of factory activity from Asia, Europe and the United States – which typically give signals of momentum in the overall economy - will be scrutinised by investors, many of whom fear that the sudden weakness of late 2018 is intensifying.Trade..