Last week, SpaceX quietly filed the paperwork to become a public company. The number on the page was the kind that stops you mid-scroll: a target valuation above $2 trillion. If it lands anywhere near that, it will be the largest stock market debut in history, bigger than Saudi Aramco's record-setting listing in 2019.
But the real story is not the headline figure. It is buried in a footnote. Reporting on Friday revealed that SpaceX has already absorbed almost $5 billion in losses from swallowing xAI, Elon Musk's artificial intelligence company, earlier this year. Its private valuation has roughly quintupled in twelve months. And a new Nasdaq rule, quietly approved on 1 May, means SpaceX could be added to one of the world's most-tracked stock indexes just fifteen trading days after it lists.
That last detail is why a teachers' union wrote a stern letter to the Securities and Exchange Commission earlier this month. Because of how index funds work — the kind sitting inside almost every workplace pension — millions of Americans, and plenty of Britons too, could end up owning Musk's most ambitious bet without ever clicking "buy". That is the part worth understanding before the rocket leaves the launchpad.
