Elon Musk’s estimated net worth climbed back above $1 trillion on Monday, October 5, as Tesla and SpaceX shares rose.

Forbes estimated his fortune increased by $30.6 billion from Friday, restoring a milestone he first reached in June following SpaceX’s stock-market debut.

A fortune tied to share prices

Musk subsequently lost his trillionaire status as shares declined. His return highlights how quickly the estimated value of large company stakes can change.

The $1 trillion figure represents estimated wealth, not cash in the bank.

Related: Elon Musk Becomes the World’s First Trillionaire. What Does It Actually Mean?

Disclosure: This article does not represent investment advice. The content is for informational and educational purposes only.