[bfwi]

This is not truly a 0% loan.

Because of the fees, you will pay a minimum of 0,74%.

Also because these mortgage instruments are traded at a price less than 100, you have to take out a loan larger than the amount of money that will be payed out. For example, to loan $100 you might have to take out a loan where you start out owing $105, which further increases the actual interest.