Uber's IPO got caught in a perfect storm of negative events on Friday, some of its own making, some, like Trump's China tariffs, outside its control (Dan Primack/Axios)

Dan Primack / Axios:
Uber's IPO got caught in a perfect storm of negative events on Friday, some of its own making, some, like Trump's China tariffs, outside its control  —  Uber's IPO stalled out yesterday, stunning both Silicon Valley and Wall Street.  —  Details: The ride-hail giant priced shares near the bottom of their range on Thursday night.