Forbes is now estimating Musk’s net worth at $US1.1 trillion ($1.56 trillion).

Rocketmaker SpaceX began trading on the Nasdaq Friday, boosting Musk’s fortune to an estimated $1.1 trillion.

SpaceX began trading on the Nasdaq Friday, boosting Musk’s fortune to an estimated $1.1 trillion

Musk's fortunes were boosted from $813 billion to over $1 trillion, sending SpaceX into the ranks of the world's most valuable companies.

Elon Musk has become the world's first trillionaire on Friday after SpaceX made its stock market debut on Nasdaq.