Jamie Dimon, JP Morgan's chairman and chief executive, has said he is "optimistic about America’s future" and the bank's role in it after "one of the most contentious elections in memory" that saw Donald Trump take the White House.

In a memo to JP Morgan staff sent on November 9, Dimon wrote: "We are going through a period of profound political and economic change around the world, and American citizens showed that deep desire for change in voting to elect Donald Trump as the 45th President of the United States.