Inexistent sales of existing homes

Forgive the exageration, but no amount of NAR (National Association of Realtors) spin could soften the grim existing home sales numbers published today. In July, sales fell 9% year-on-year, couples with a 0.6% fall in the median price of homes sold and a rise in unsold home inventories to 9.6 months supply (compared to 7.3 months in July 2006). Notwithstanding, these numbers were in line with market expectations.

To give some perspective, here's the annual series of existing home sales:



Clearly, this series has seen extraordinary growth, expanding at an annual clip of nearly 3% since 1987, far above population growth. How sustainable is this? I don't have a good answer, but a good starting point is adjusting those sales by population growth (existing homes sold per 1,000 persons).



Taking the latest figure, sales per 1,000 persons stand at 19. If they fall closer to the 14-15 level seen in the early 1990's, sales could still fall another 20% or so (maybe the equilibrium level is higher due to demographic and income factors, but there's bound to be an undershoot and this was another period with soft market conditions).

This ain't over yet.

Behind the numbers: House prices

House prices have never fallen since the government started keeping records in 1950, according to this NY Times piece. Actually, they have never fallen since the Great Depression, according to the National Association of Realtors. But they have, in the early 1990’s and since June 2006, according to the Case-Shiller composite index. Confused?

I am (and so is the Times, as they confuse the NAR and OFHEO measures, see below). This is not surprising. The various home price measures differ greatly in coverage and methodology. Here’s a handy guide to the main ones:

OFHEO House price indexes

Calculated by the Office of Federal Housing Enterprise Oversight (the folks who regulate Freddie Mac and Fannie Mae), this index starts in 1975 and has national coverage. It geometrically weighs changes in the price of single family homes on which at least two mortgages have been taken out and bought by Freddie Mac and Fannie Mae. These This helps ensure that the houses included have comparable characteristics over time, avoiding biases resulting from changes in the composition of sales.

It does have two main limitations. VA and FHA mortgages are not included, as are those that exceed the federal loan limit of $417,000. More info can be cound here.

Case-Shiller indexes

Methodologically, they're very similar to the OFHEO indexes (weighted repeat transactions on single family homes). However, they're based on transactions as recorded in county assesor and recorder offices. The geographic coverage is much more limited, as only the largest 20 metropolitan areas are included. It does have the advantage that it covers high-end homes. More info can be found here.

New Home Prices

Published by the Census Bureau, these prices are by definition not comparable to the previous two indexes, as they only cover new houses (a small part of the total real estate market). Information can be found here.

NAR Indexes

The National Association of Realtors publishes information on median and mean prices of existing homes sold (for both single-family houses and condos/co-ops), based on a sample of national transactions. It is subject to biases resulting from changes in the type of units sold and does not adjust for quality (comparable characteristics, as the C-S and OFHEO do by using repeat transactions). The methodology is presented here.

Summary

The Case-Shiller indexes seem to offer the most accurate measure of trends in house prices. However, it does have the drawback of having limited geographical coverage. OFHEO indexes don't have this problem, but the exclusion of high-value housing is a very big flaw. Lack of quality adjustments clearly makes the NAR median home price indicator a much inferior alternative. In the end, they're fairly complementary and should all be analyzed. The following graph shows that the NAR and OFHEO measures produce similar results that are very different from the Case-Shiller index.



This Fed paper (PDF) provides much more information on this topic.

Shiny happy realtors

It is very easy for spin to mutate into full self-deception. Just ask any politician. Spin will only work in the long run if it is used sparingly and doesn't involve transparent falsehood. Otherwise it destroys credibility and undermines the ability to achieve long-term objectives.

Somebody should tell this to the National Association of Realtors. The other day I documented how their "house prices haven't fallen since the Great Depression" meme, which is fundamentally false, is coming back to bite them in the ass. But it seems they just can't help themselves. See for yourself at Freakonomics' real estate quorum.

Thou shalt not lie: NAR edition

I've heard the meme that "house prices are falling for the first time since the Great Depression" quite a few times recently (examples here and here). The source cited is the National Association of Realtors (the phrase appears in many of their documents).

I'm not sure how these folks came up with it, but its clearly nonsense. We only have to go back to.....1991 to find widespread falling real estate prices. The Case-Shiller indices, probably the most realiable data around, show that nationally prices fell 6.8% between the peak in October 1989 and the trough in February 1994.

Ironically, the NAR has been parroting this line for quite a while now, obviously expecting people to believe that home values hardly ever drop and only do so in the most extreme circumstances. Well, the lie has come back to bite them in the ass. Nowadays, it's more likely to inspire (unwarranted) panic than confidence.