So about now I would normally start to correct the Nationwide House Price Index to account for the devaluation of money through inflation and ratio this with average persons earnings. I would then come to the same conclusion that I always do. House prices are overvalued when compared to the long run average. I’m now starting to think that I am going about this the wrong way. The average person on the street does not analyse data and look at what house prices should be. The average person on the street instead knows the price of everything and the value of nothing. Instead, I’m starting to come to the realisation that what is driving this market is not house prices but simply house affordability. Not how much is this house worth, but instead can I today (no thinking of future interest rates) borrow enough money to buy this over priced piece of bricks and mortar.
So what drives affordability? I believe the major drivers are two things:
- How much a person earns, and
- How much of these earnings have to go to make interest payments today