Brazil's financial market analysts expect the South American giant's GDP to grow by 3.1 per cent this year, considerably below government estimates, dpa reported. The markets clearly do not share the optimism of Brazilian Finance Minister Guido Mantega, who had forecast growth of 4.5 per cent for 2012 despite the ongoing eurozone crisis and slow growth in many other industrialized economies. The Brazilian Central Bank made the analysts' growth forecast public in its weekly report Monday. The survey of analysts was down from a week earlier, when it stood at 3.2 per cent.