UPDATE: Valero Swings To Loss In 4Q On $4 Billion Goodwill Charge

to add analyst comment, background) By Jessica Resnick-Ault Of DOW JONES NEWSWIRES NEW YORK -(Dow Jones)- Valero Energy Corp. (VLO), the largest refiner in the U.S., posted its first loss in six years in the fourth quarter due to a $4.1 billion goodwill...