The S&P 500 saw its biggest gain in more than a month on Thursday, supported by technology stocks and strong GDP data.
Preliminary figures released today show the US economy grew at an annual rate of 3.2% in the last quarter of 2013, in line with analysts' expectations.
UK GDP rose by 0.7% in Q4, according to an initial estimate from the Office for National Statistics, with growth for the year as a whole rising at its fastest rate since 2007.