Is This 1 Thing the Biggest Risk for Uber Stock?

Uber (UBER -3.66%) gave investors a lot to cheer about when it reported its fourth-quarter financials. Revenue increased 15% year over year to $9.9 billion, while the company generated $1.4 billion in net income during those three months. Both of these headline figures crushed Wall Street consensus analyst estimates.In the last 12 months, shares of Uber have soared 102% (as of Feb. 12). And they recently hit a fresh all-time high.Before you rush to buy this transportation-as-a-service stock in the hope of r ...