On June 12, SpaceX started trading on the Nasdaq under SPCX, and for one afternoon every group chat in America became an investment committee. Largest ever: $86 billion raised, a $1.77 trillion valuation at pricing. The rocket company was finally buyable, and the fear of missing the next Apple did what it always does.

No buy call here, and no don't-buy either. This is the part your feed skipped: what mechanically happened that day, because it's the single best live lesson in how IPOs actually work that anyone will get for years.

Who got $135, and who got $161

The was $135 a share. That price went almost entirely to institutions: banks, funds, and clients of the underwriters. When trading opened to everyone else, the first public trades printed around $150, and the day closed at $161, a 19% pop. If you bought on IPO day, you didn't buy the IPO. You bought from someone who did, at their markup. That gap between the offering price and your price has a whole guide of its own, and June 12 was the textbook running in real time.

The float and the calendar

Only about 5% of the company actually traded. Insiders agreed not to sell for 366 days, other early investors for 180. Which means the supply of SpaceX shares is scheduled to grow substantially, on dates anyone can look up, while first-day demand got one afternoon of maximum hype. Prices are set by supply and demand; one of those two is on a public calendar. Also worth knowing: buying SPCX gets you almost no say in anything, since one person retains 82% of the voting power through super-voting shares.

The boring plot twist

If SpaceX earns its way into the big indexes, the most retirement accounts hold will buy it automatically, at whatever the fair-ish market price is then, and you'll own your slice without lifting a finger or paying the hype tax. That's not a thrilling sentence. It wasn't designed to be. Index funds never are.

Rooting for the rockets costs nothing. If you also want to own a piece, know which price you're actually being offered, who's selling in six months, and whether a single exciting stock belongs in the plan you already have. Excitement is free. Concentration isn't.