The traditional mortgage model involved a bank financing a loan to the borrower/homeowner through the deposits they received from customers and retaining the credit (default) risk.With the advent of securitisation, the traditional model gave way to a new model of “originate to transfer” in which the investment banks essentially sold the mortgages and transferred the credit risk to investors through mortgage-backed securities. Since 2002 the private sector had dramatically expanded its role in the mortgage market which had previously been dominated by the government sponsored agencies6 such as Freddie Mac.