Elon Musk is no longer a trillionaire after a massive week-long rout in SpaceX shares erased nearly $500 billion from his fortune. Musk's net worth had hit a peak of $1.45 trillion, which has now dipped to $957 billion, as per Bloomberg Billionaires Index. SpaceX shares have also lost billions and have now brought SpaceX's valuation to $2.07 trillion.