A speech by the U.N. chief, economic growth potential in places like China and Russia, the challenges of artificial intelligence, and appearances by leaders from Spain to Malaysia are set to headline the agenda at the World Economic Forum's annual event in Davos on Wednesday.

Bankers at JPMorgan worked through the night in a "war room" to try and assess the early impact of U.S. President Donald Trump's administration on global trade, regulation and other matters, an executive at the bank said on Tuesday.