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 expectations.

Elon Musk firm plans the biggest stock market launch in history – but experts have flagged potential downsides

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…