According to CNBC, as of Thursday afternoon, Tesla and SpaceX have suffered a combined market capitalization loss of over $420 billion since Tuesday's close. Shares of both companies dropped approximately 9% and 11% respectively on Thursday afternoon, coinciding with a broader tech stock sell-off. The report noted that investors are concerned Musk could face new congressional investigations following the U.S. midterm elections, alongside the potential for stricter regulatory scrutiny on both companies. The aforementioned $420 billion represents the cumulative loss over the measured period, not a single-day decline.