U.S. regulators have asked banks to come up with their best and final bids for First Republic, hoping the move will calm market sentiment and bring an end to an uncertain period for regional banks. JPMorgan Chase & Co. and PNC Financial Services Group Inc. are possible suitors for First Republic Bank, according to people familiar with the matter. Other companies may follow, and Bank of America is one of several other institutions considering a bid for First Republic. (CNBC)