By | August 03 2012 3:11 PM

The Boeing Co. (NYSE: BA), the largest U.S. aerospace manufacturer, widened its lead in 2012 orders over rival EADS N.V. (Paris: EAD)'s Airbus SAS after Singapore Airlines Ltd. (Singapore: C6L) said Friday it was buying 50 Boeing 737 airplanes valued around $4.9 billion.