Our big banks are a core holding in most Australian portfolios. But with long-term loan book growth likely to be materially lower in coming years, bank profits – and share prices – could be adversely impacted. There are broadly six variables to focus on when assessing the outlook for the banks: Loan book growth; Net interest margins; Non-interest income growth; Cost growth; Asset quality; and Capital requirements. In the full post below, we look at the outlook for the first variable, loan book growth.