What on earth is going on with Tesla? The stock skyrocketed, and then plummeted. And it still ended the day worth more than Toyota, Ford, and GM combined. This is partly because they make great cars, with great batteries, and could have a dominant position as the world transitions to electric automobiles. It’s partly because Elon Musk has been on better behavior recently---at least when not denying the effects of coronavirus. And it’s partly, well … just a crazy market with a lot of people betting in all directions.