Elon Musk’s wealth exceeds $400 billion for the first time ever

Elon Musk has become the first person to reach $400 billion in net worth, the latest achievement for the world’s richest person.

The most recent catalyst was an internal stock sale at privately owned SpaceX, which boosted Musk’s net worth by about $50 billion in one fell swoop to $439.2 billion, according to the Bloomberg Billionaires Index.