The falling interest rates are heralded by consumers of Irish mortgage companies as a godsend – well, for the clients of the Irish banks who actually pass on the full rate cuts that is! However, at the same time it creates a rate compression which damages the bank and this is what we will consider in this article.
Banks have two sides to the operation roughly speaking, on one side there is the lending function which we are all aware of, mortgages, car loans, personal loans etc. on the other side is the deposit taking function which provides part of the money they lend out. There is of course the interbank market which supplements (and often surpasses) deposit funds for lending, but to keep things simple we will focus on a world where deposits roughly equal lending.