Elon Musk becomes world's fourth richest man on Tesla boom

Inventor now worth $90bn, trailing Mark Zuckerberg, Bill Gates and Jeff Bezos

Elon Musk has soared through the global wealth league this year and become the world's fourth richest person, after a boom in the share price of the Tesla car company he co-founded and part-owns increased his wealth by more than $13.3bn (10bn) in two days of trading.

The Silicon Valley inventor and entrepreneur is now worth more than $90bn and has overtaken France's richest person, the luxury goods tycoon Bernard Arnault, chairman of Louis Vuitton, cementing the place of American tech plutocrats at the top of the world's rich list.