“UK house prices rose to a new high in August, according to the Office for National Statistics (ONS)” reports the BBC. “House prices in August were 3.8 per cent higher than the previous year at £247,000 - topping the previous all-time high recorded in January 2008, according to the Office for National Statistics” reports The Telegraph. “Average house prices in the UK leapt to a record high of almost £250,000 during the summer” reports The Times. Sometimes I really do despair. Is there no decent journalism left in this great country of ours? Before we even get into this posts content let’s be clear. A new house price high has not been hit. The last high was back in 2007 and we are nowhere near that today. Let’s now run the numbers to prove it.
Firstly it’s important to understand that there are a multitude of UK House Price Indices out there with every one of them measuring something different. I track five of them:
To use these indices we must also remember there is a timing shift between the indices. Firstly, a house is placed on the market for the first time (the Rightmove Index). Secondly, somebody possibly buys the house using a mortgage (the Nationwide and Halifax Index). Finally, the purchase is registered with the Land Registry (the Land Registry and Academetrics). The best estimate of this timing shift is shown in the chart within the paper by Robert Wood entitled A Comparison of UK Residential House Price Indices.
Let’s apply this timing shift, place all of the indices onto a chart and look at what we have.
The Nationwide, Halifax and Academetrics, while showing a recent uptick, are all nowhere near record highs. The Rightmove Index suggests a record high was reached in August and Academetrics shows we have just seen one. The argument is flawed though because all of these indices are measured in a currency which is being continually devalued through inflation and so is not a constant. Let’s therefore correct for that and have another look.
That looks pretty compelling to me. UK House Prices are nowhere near a new high.
Firstly it’s important to understand that there are a multitude of UK House Price Indices out there with every one of them measuring something different. I track five of them:
- The Rightmove House Price Index. It calculates its house price by simply taking the Arithmetic Mean or Average asking price of properties as they come onto the market. This means it will be affected by price changes, if the mix of house type changes and if the mix of location changes for houses coming onto the market. It is not seasonally adjusted and covers properties from England and Wales. So this index really doesn’t track house prices as no purchase is required for it to appear within the index making it pretty much worthless. I only use it as a possible leading indicator (see below).
- The Acadametrics House Price Index. This index uses the Land Registry dataset but in a different way. It calculates its house price by taking the Arithmetic Mean or Average of bought prices. It then mix adjusts the data to take a constant proportion of property types, from a constant mix of geographic areas. It is seasonally adjusted and covers properties from England and Wales. It covers buyers using both cash and mortgages.
- The Halifax House Price Index. This index is based on buying prices of houses where loan approvals are agreed by Halifax Bank of Scotland. It uses hedonic regression to remove type and mix variations thereby measuring the price of a standardised house. I use the non seasonally adjusted dataset and it covers the complete United Kingdom.
- The Nationwide House Price Index. This index is very similar to that of the Halifax except it is based on buying prices of houses where loan approvals are agreed by Nationwide.
- The Land Registry House Price Index. This index uses repeat sales regression on houses which have been sold more than once to calculate an increase or decrease. As it analyses each house and compares the latest buying price to the previous buying price it is by definition mix adjusting its data also. This is then combined with a Geometric Mean price which was taken in April 2000 to calculate the index. It is seasonally adjusted and covers properties from England and Wales. It covers buyers using both cash and mortgages.
To use these indices we must also remember there is a timing shift between the indices. Firstly, a house is placed on the market for the first time (the Rightmove Index). Secondly, somebody possibly buys the house using a mortgage (the Nationwide and Halifax Index). Finally, the purchase is registered with the Land Registry (the Land Registry and Academetrics). The best estimate of this timing shift is shown in the chart within the paper by Robert Wood entitled A Comparison of UK Residential House Price Indices.
Let’s apply this timing shift, place all of the indices onto a chart and look at what we have.
Click to enlarge
The Nationwide, Halifax and Academetrics, while showing a recent uptick, are all nowhere near record highs. The Rightmove Index suggests a record high was reached in August and Academetrics shows we have just seen one. The argument is flawed though because all of these indices are measured in a currency which is being continually devalued through inflation and so is not a constant. Let’s therefore correct for that and have another look.
Click to enlarge
That looks pretty compelling to me. UK House Prices are nowhere near a new high.