What's the lockup period for employees? Six months? Is it likely the stock of a company that isn't profitable (except in a few markets) and is rapidly burning through cash reserves is worth more in six months than it is today? Their marketed value isn't on being a profitable cab service in a few major markets, they argue they're taking over the world of mobility (which is obvious they aren't and can't).

Disclaimer: Armchair investor, intend to buy puts when they're available on the hunch there are no further greater fools to buy UBER