The British pound fell sharply against the dollar on Sunday ahead of a key speech by U.K. Prime Minister Theresa May in which many investors believe she could spell out an end to her country's participation in European Union's single market. The currency declined 1.6% against the dollar to $1.199. The pound dropped 1% last week after May repeated earlier indications that she was looking to push for a 'hard Brexit ' from the EU, which Britain voted to leave last June.

U.S. stocks have had an incredible run over the last two months and even at these record-breaking levels there are still profits to make - at least until March, when it will be time to run for the hills. That's a key message from Goldman Sachs chief U.S. equity strategist David Kostin, who says optimism over expected tax reforms from the Trump administration is likely to push the S&P 500 index SPX, +0.18% to 2,400 by the end of the first quarter.

Asian stocks indexes ended the week broadly lower after choppy trading Friday, as markets sought direction after largely trending higher in 2017. Market players have begun to adopt a wait-and-see approach following the great expectations a number of people had in the immediate aftermath of Donald Trump's election win.