Unpredictable change will sweep through America, while old problems, from war to inflation, are likely to afflict other countries

The global economy is entering the new year with rising geopolitical tensions looming over its prospects, as the world’s leading central banks attempt to cut interest rates after the worst inflation shock in decades.

Donald Trump’s second term in the White House is expected to dominate the economic agenda. Global trade tensions are on the horizon as the president-elect threatens to impose sweeping tariffs on US imports.