White House says a further $267.0bn-worth of tariffs set to be imposed

Shares on Wall Street are slipping lower after it was reported that Donald Trump had threatened tariffs on an additional $267.0bn-worth of Chinese goods on top of those on $200.0bn-worth which his administration was already mulling and the $50bn-worth which had already gone into effect.

That was according to reports citing Bloomberg and Reuters coming from Air Force One, the US President's official jet.