Investors who bought the shares are unlikely to see the explosive growth that past IPOs had.

Most of the value in SpaceX's IPO is effectively a call option on the company's ambitious space data center plans.

Splashy initial public offerings often skyrocket early on, only to return to earth with a thud, Wall Street analysts say.

Musk owns 85 percent of the controlling shares, so “public” is relative.

Elon Musk's aerospace company raised a whopping $75 billion by selling 555.6 million shares, or about 5% of its stock, in Friday's much-awaited market debut. However, in the weeks…