Rockwell Collins, the Iowa-based avionics firm that recently acquired B/E Aerospace and its Winston-Salem operations for $8.6 billion, recently approved the repurchase of an additional $200 million worth of the company's common stock. With this additional authorization, total share repurchases authorized by the company as of Friday is $285 million. Companies often buy back their owns shares if they believe that the company's stock is undervalued. "This additional authorization demonstrates the...