PacWest Bancorp is exploring strategic options including a sale or capital raising, a source familiar with the matter said, sending the shares of the bank and several other U.S. regional lenders tumbling in after-market trading. Later on Wednesday, Western Alliance Bancorp sought to assure markets, saying it had not experienced any unusual deposit flows and had adequate liquidity. The … Continue reading PacWest weighs its options, sending bank shares in a tailspin