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

"Selling flows in recent winners and levered products from retail to invest in SpaceX could be very large."

SpaceX IPO: At roughly 110 times trailing sales, Elon Musk-led company's valuation assumes years of rapid growth, raising the stakes for investors if the company falls short of…

The SpaceX initial public offering on Friday brings big expectations from Wall Street, but will it really deliver as promised?