This is the classic option, where the interest rate has a variable component, the famous Euribor, which, when added to a differential, will increase or decrease the interest on our mortgage during the periodic reviews we have.
Fixed Mortgage
Here, the interest rate remains the same always, offering the security of always paying the same amount and protecting us against future Euribor increases, but without being able to take advantage of Euribor decreases.
Mixed Mortgage
This is a hybrid of the previous two, offering an initial fixed period where we will always pay the same amount, followed by a variable period with an interest rate linked to the Euribor. In these times of Euribor volatility, it can be an interesting option.