Despite predictions of a billionaire boom under Donald Trump, many of the world's richest people have seen their net worth tumble in recent weeks.

The world's top tech billionaires saw their fortunes plummet on Monday as markets tumbled, with the Magnificent Seven tech ...

The Amazon founder and Washington Post owner vowed to follow the example of Katherine Graham. He changed his mind after Trump’s election.

Eight tech titans have suffered a $266 billion wealth wipeout this year, with Elon Musk's net worth plunging by $132 billion.