Investors need unity - and Musk-Navarro row doesn't help

The tension between Elon Musk and Peter Navarro is "quite a story developing", US correspondent James Matthews says.

Speaking from the New York Stock Exchange, he says: "Having gaged the view from the money men here, they say this is the last thing they need."

Matthews notes that investors already have "layers of uncertainty" from Donald Trump and "what they need in unity from the team around Trump".

"That political fracture line doesn't help the markets. And of course, it is quite the story at the upper levels of the White House," he adds.

As we reported earlier, the Tesla boss called Navarro a "moron" after the senior Trump adviser called Musk a "car assembler" not a "manufacturer".