United tanks 11% as outlook disappoints

Shares of United Continental are down more than 10% on Thursday.
The company gave investors a disappointing pre-tax margin forecast.United Continental shares are under pressure on Thursday, down more than 10%, after the company gave a disappointing profit outlook.  
The company beat Wall Street estimates on both the top and bottom lines, earning $2.22 a share on revenue of $9.87 billion, but it was the pre-tax margin forecast of between 3% and 5% for the fourth quarter