Comment by joppy

Whatever the case, what you end up with is an asset whose actual value is tied to the interest rate (interest goes down, people can afford larger loans with the same repayments, therefore houses are worth more). This is a highly leveraged situation: if you take out a $1m loan and then interest rates go up, you're still liable for the whole $1m even though your actual asset might only be worth $900k now. I think this is one of the big dangers of having an essential need like housing cost such a large multiple of income.