An ETF that can trade all day is investing in an asset that rarely changes hands. Figuring out what it’s worth is a guessing game.

Elon Musk's space exploration business, SpaceX, got a lot of headlines late last year when it was valued at $350 billion -- a gain of more than $100 billion from its previous valuation, according

I would prefer to stay out of politics,” Elon Musk told his followers in 2021, on the platform then known as Twitter. Plenty has changed since then. The world’s richest man appears to have a new goal: upending Europe.