Shares of Tesla Inc., Elon Musk’s public company, have been in freefall for the last few months. But shares in his private companies aren’t.Secondary market investors have sent the collective valuation of four of Musk’s private entities up 45% since the US election,

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.