The article shows that when buying a house with a loan, the price can be much higher than the actual value of the property. This can make the risk of the loan being paid back lower than it seems. The risk is even higher with certain types of loans, like ones where you only pay interest or where the loan amount is more than the property's value. The study suggests that many loans made during the housing boom were already in trouble from the start. This raises concerns about how loans are approved and managed.