Shares of Musk's SpaceX and Tesla fell by about 9% and 11%, respectively, on Thursday. Investors are worried that after the US midterm elections, Musk may face a new round of investigation by the Democrat-controlled Congress, and his company may also face stricter regulation. Since the close of trading on Tuesday, the total market capitalization of SpaceX and Tesla has shrunk by about $456 billion. According to Forbes estimates, Musk's personal wealth has fallen below $800 billion. In the past week alone, its wealth has shrunk by about $90 billion.

Shares of Musk's SpaceX and Tesla fell by about 9% and 11%, respectively, on Thursday. Investors are worried that after the US midterm elections, Musk may face a new round of investigation by the Democrat-controlled Congress, and his company may also face stricter regulation. Since the close of trading on Tuesday, the total market capitalization of SpaceX and Tesla has shrunk by about $456 billion. According to Forbes estimates, Musk's personal wealth has fallen below $800 billion. In the past week alone, its wealth has shrunk by about $90 billion.