Elon Musk reignited a public dispute with fellow billionaire and space-industry rival Jeff Bezos, saying the Amazon.com founder had said President-elect Donald Trump would lose the election and that people should sell stock tied to Musk.

Musk and Bezos — the richest and third-richest men in the world, who are both fixated on getting humanity off of it — have had a simmering rivalry for close to two decades now. But with Bezos’s Blue Origin and Musk’s SpaceX fighting for lucrative NASA contracts, the stakes have never been higher.