by Calculated Risk on 5/13/2008 01:30:00 PM

From San Francisco Fed President Janet Yellen: Credit, Housing, Commodities, and the Economy. (here is a PDF with graphs)

On housing:

Now let me turn to the second of the three main factors behind the current economic weakness—namely, the housing cycle. I have mentioned that earlier in this decade when financial markets were “awash in liquidity,” bubble-like conditions emerged in many areas of the economy, including housing. During this period, housing construction was very strong and housing prices soared. In fact, the ratio of house prices to rents—a kind of price-dividend ratio for housing—reached historical highs by early 2006, suggesting that house prices might be well above those that could be justified by fundamentals.

Since then, housing markets have “hit the skids.” In inflation-adjusted terms, residential construction fell by 13 percent in 2006 and by 14 percent in the first half of last year. Of course, once the financial shock hit last summer, things got even worse, with real residential construction dropping at a 24 percent rate on average since then. And, indicators of conditions in housing markets are pointing lower for the future. Housing starts and permits as well as sales are trending down, and inventories of unsold homes remain at very high levels. These inventories will need to be worked off before construction can begin to rebound.

Click on graph for larger image.

I’ve already discussed the precipitous fall in house prices nationally, so it’s striking to note that, even with these declines, the ratio of house prices to rents remains quite high by historical standards. That, of course, suggests that further price declines may be needed to bring housing markets into balance. This perspective is reinforced by futures markets for house prices, which expect further declines in a number of metropolitan areas this year. In particular, the Case-Shiller composite index for home prices shows a 15 to 20 percent year-over-year decline in the second half of this year.

The bottom line is that construction spending and house prices seem likely to continue to decline well into 2009.