July 7–8, 2025: The first trading day since Musk’s weekend announcement, Tesla shares tumbled, and Musk’s personal fortune dropped by as much as $15 billion, according to the Bloomberg Billionaires Index. As of July 9, it stands at $349 billion with Tesla shares broadly unchanged.

Elon Musk's empire isn't exactly crumbling, but it looks increasingly vulnerable as his falling out with President Trump intensifies. Why it matters: The world's richest person enjoyed ballooning wealth in the early days of his alliance with the president,