The article examines the cost of insurance in fixed-rate mortgages compared to variable rates in Switzerland from 2002 to 2012. Fixed-rate mortgages are like insurance against payment fluctuations, but they can be more expensive for borrowers. The study found that the implied insurance cost of fixed-rate mortgages can range from 0.5% to 7% of the total initial mortgage when compared to variable rates. This research helps understand the relative cost of different mortgage options and how they impact borrowers over time.