Answer :
Answer: Ethical Egoism
Explanation:
The theory of Ethical Egoism posits that people or entities are well within their rights to act in a manner that benefits their best interest and in so doing are being good in their own right.
The small bank acted in such a manner that it left itself unexposed to risk whilst still making quite a huge profit. The small bank pursued its own interests and so followed the moral theory of Ethical Egoism.