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

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

Elon Musk, the worldā€™s richest person, registered the largest increase with a $26.5bn addition to his fortune, which now stands at $290bn. The prominent backer of Trumpā€™s campaign, benefited from a surge in the share price of Tesla, the electric carmaker where he is chief executive and in which he owns a 13% stake.

The gains came as tech business leaders, including Amazonā€™s Jeff Bezos, Mark Zuckerberg, chief executive of Facebook parent Meta, and Appleā€™s Tim Cook publicly congratulated Trump on his election winā€¦