PacWest Bancorp., a regional bank teetering following the collapse of three rival lenders, has been weighing a range of strategic options, including a sale, according to people familiar with the matter. The Beverly Hills-based bank has been working with a financial adviser and has also been considering a breakup or a capital raise, said the people, who asked to not be identified because the matter isn’t public. While it is open to a sale, the company hasn’t started a formal auction process, the people said. An outright sale has been hindered because there aren’t many potential buyers interested in the entire bank, ... (full story)