UAL Corp. ( UAL ) shares made a comeback hours after the parent company of United Airlines announced it was filing for Chapter 11 bankruptcy. UAL chairman Glenn Tilton says the company and its employees are gearing up to pull the nation's second-largest airliner out of bankruptcy in 18 months. Manulife Financial offered to acquire Canada Life Financial ( CLU ) for $6.4 billion Canadian dollars (US$4.1 billion) -- $40 Canadian dollars a share -- or 1.055 Manulife share per Canada Life share.