Banks are run by executives, and executives protect themselves, and that does not always mean that banks are going to behave rationally.
Daniel KahnemanHowever, optimism is highly valued, socially and in the market; people and firms reward the providers of dangerously misleading information more than they reward truth tellers. One of the lessons of the financial crisis that led to the Great Recession is that there are periods in which competition, among experts and among organizations, creates powerful forces that favor a collective blindness to risk and uncertainty.
Daniel KahnemanThe dominance of conclusions over arguments is most pronounced where emotions are involved.
Daniel KahnemanFinally, the illusions of validity and skill are supported by a powerful professional culture. We know that people can maintain an unshakeable faith in any proposition, however absurd, when they are sustained by a community of like-minded believers. Given the professional culture of the financial community, it is not surprising that large numbers of individuals in that world believe themselves to be among the chosen few who can do what they believe others cannot.
Daniel Kahneman