A borrower seeking a mortgage today is often presented with the choice between a mortgage whose interest rate and monthly payment stays fixed for the duration of the loan, or a mortgage whose interest rate and monthly payment can change as other interest rates change. Typically the interest rate on the fixed-rate mortgage is higher. Having learned the five core principles, does this make sense?

What will be an ideal response?

Yes. The lender is shifting risk to the borrower. The risk here is that the lender agrees to a mortgage at (for example) 6% but then over the life of the loan (which can be 10, 25, even 30 years) interest rates in the market go up, putting the lender in the position of being "stuck" with the 6%. If the rate on the mortgage would change with market rates the lender would not have the risk. But remember, risk requires compensation, so to entice the borrower to take on the added risk the lender provides an inducement in the lower rate. A smart borrower will make the decision about whether or not the lower but changeable rate is a good decision based on information about interest rates (information, stability), and the decision may also depend on how long the borrower plans to live in the house (time).