US president has clashed with incumbent Jerome Powell, whose term is due to run for 11 more months

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The dollar has fallen to a three-year low following a report that Donald Trump is considering bringing forward the announcement of his choice to succeed the Federal Reserve chair, Jerome Powell.

The US president has repeatedly clashed with Powell, accusing the central bank chief of being too slow to cut interest rates, calling him “very dumb” in his latest broadside on Tuesday.

Powell’s term as chair is due to run for another 11 months, until next May, and the announcement of a successor traditionally comes three or four months in advance.