Sears Holdings Corp., the department-store operator run by hedge fund manager Edward Lampert, posted a $580 million fourth-quarter net loss as sales continued to slide. The loss compared with a $159 million net loss a year earlier, the Hoffman Estates, Illinois-based company said in a statement Thursday. On an adjusted basis, before interest, taxes, depreciation and amortization, the loss was $82 million, within the $50 million to $100 million range Sears...