Four years after questioning whether global investment banks would survive the regulatory scrutiny unleashed after the financial crisis, JPMorgan Chase & Co. analysts are now singing a different tune. Investment banks are "in better shape and better managed than ever, especially in the U.S.," analysts led by Kian Abouhossein wrote in a note to clients Monday. "Global investment banks have made excellent progress in reducing their cost base and continue to remain focused on creating positive operating leverage."