Share surge increases Elon Musk’s fortune by $26bn in a day as Jeff Bezos, Sergey Brin and Bill Gates also benefit

The wealth of the 10 richest people in the world – a list dominated by US tech billionaires – increased by a record amount after Donald Trump’s victory in the presidential election, according to a widely cited index.

The Bloomberg Billionaires Index estimated that the world’s 10 wealthiest people gained nearly $64bn (about £49.5bn) on Wednesday, the largest daily increase since the index began in 2012.