Trump bought the Tesla after a March event with Musk that turned the White House's South Lawn into a showroom for Musk’s electric vehicles.

Anyone who’s owned Tesla stock is intimately familiar with both volatility and Elon Musk. There’s a case to make that they are one in the same. Thursday gave us the latest reminder of this, as Musk and President Trump swapped escalating barbs online,

For months, Tesla shareholders were tormented by Elon Musk’s role in the administration of President Donald Trump. But any relief brought by his formal government exit last week quickly turned to fear as the electric-vehicle maker’s chief executive traded barbs with his former boss.