During the housing crisis in the US a lot of mortgages were ARMs, which are basically the same thing as your describing. https://www.cbsnews.com/news/adjustabl

During the housing crisis in the US a lot of mortgages were ARMs, which are basically the same thing as your describing. https://www.cbsnews.com/news/adjustable-rate-mortgages-make-a-comeback/ https://www.cbsnews.com/news/adjustable-rate-mortgages-make-...