UPDATE 1-Brazil's real posts lowest ever close of 4.2061 per dollar

Brazil's real posted its lowest ever close of 4.2061 per dollar on Monday, as heavy selling met no resistance from the central bank at a key market level where it had intervened earlier this year.Brazilian interest rates are expected to be cut to a new low of 4.25% by the end of next year, according to the central bank's latest weekly 'FOCUS' survey of economists on Monday, which also showed inflation heading further below target.