Is Tesla Stock More Valuable Than SpaceX?

SpaceX trading is set to begin, officially making Tesla and SpaceX CEO Elon Musk a trillionaire. SpaceX is worth more to Musk than Tesla, but which company will turn out more valuable to investors is harder to say. Tesla stock was up 0.2% in premarket trading at $399.86 Friday, while and futures were up 0.4% and 0.5%, respectively.