Strong consumer spending and business investment and a slightly lower than previously reported trade deficit meant the US economy grew at a 3.9 per cent rate in the third quarter, the Commerce Department said. The upward revision from the 3.7 per cent advance estimate was above consensus expectations and represented a rebound from 3.3 per cent growth in the second quarter. Core personal consumption expenditures inflation, excluding food and energy, the Federal Reserve's preferred measure of inflation, was unchanged at a 0.7 per cent rate in the quarter - the lowest reading since the 1960s. The report provided further support...