How far will the price of domestic houses fall? I told my friends about my own calculation method, annual rent * (10 or 15) = the range of the investment return cycle. This is exactly the range of the return on investment in houses in various countries around the world. It can also be said to be a median. When the rental return rate of urban houses reaches 15 or less, or less than 10, investors will inevitably snap up the bargains. This is my own calculation of the price it will drop to.