Sky-high markets are new risk to billionaires beyond death and divorce

For the world’s richest people, there used to be three ways to quickly see a fortune disappear: Death, default or divorce.

The past few months have added another risk: Sky-high valuations of giant technology companies falling from the stratosphere.

Mark Zuckerberg’s wealth plummeted as much as $31 billion on Thursday, the third-biggest one-day drop in wealth since the Bloomberg Billionaires Index began compiling data in 2012. Two of his co-founders, Eduardo Saverin and Dustin Moskovitz, saw their fortunes tumble $4.6 billion and $3.1 billion, respectively, as Meta Platforms Inc. shares plunged 26%. Over at Spotify Inc., Chief Executive Officer Daniel