The cumulative value of SpaceX, Neuralink, the Boring Company, and xAI has shot up 45% on private markets since last November, according to data provided to Fortune by secondary market trading platform Caplight . Musk's social media company X was not factored into the calculation because of a lack of interest from investors on the secondary market.

After a slight rebound earlier this week, Tesla's TSLA stock is back to falling, keeping with its recent performance. Even U.S. President Donald Trump's purchase of one hasn’t done much to spark real momentum for the electric vehicle (EV) leader.

Tesla stock closed down 3% at $240.68, while the S&P 500 and Dow Jones Industrial Average lost 1.4% and 1.3%, respectively. Tesla stock rose 7.6% on Wednesday after gaining 3.8% o

"As a traditional investor, it doesn't fit any valuation system that makes any sense compared to any other stock," Ross Gerber said of Tesla.

Tesla (TSLA) took a brutal hit this past week, plunging 15% in a single day, one of its worst performances since going public. The drop erased