by Calculated Risk on 9/26/2005 04:26:00 PM

Bloomberg reports: Greenspan Says Speculation Having 'Greater Role' in Home Prices

Sales of vacation houses, or homes that aren't always occupied by owners, are "arguably at historically unprecedented levels," Greenspan said in the text of his remarks to the American Bankers Association annual convention in Palm Desert, California. "This suggests that speculative activity may have had a greater role in generating the recent price increases than it customarily has had in the past."

MarketWatch adds: Greenspan weighs in on home prices, Drops may not be fatal, even as housing fuels spending

A new study, co-authored by Greenspan, has found that about four-fifths of the rise in home-mortgage debt has been due to homeowners taking some cash out of the rise in their property's value.

"It is difficult to dismiss the conclusion that a significant amount of consumption is driven by capital gains on some combination of both stocks and residences," Greenspan said.

As a result, consumer spending would decline if mortgage rates rise and home turnover and opportunities for mortgage refinancing cash-outs decline, he added.

There also would be some positive developments, as the personal savings rate would likely rise, and the trade deficit would narrow given the likely drop in imports of consumer goods.

"How significant and disruptive such adjustments turn out to be is an open question," Greenspan said.

Here is the Greenspan study (PDF): Estimates of Home Mortgage Originations, Repayments, and Debt on One-to-Four-Family Residences

A few comments: 80% of the increase in mortgage debt "has been due to homeowners taking some cash out". That is a huge amount. If cash refis were cut in half for the last year, GDP would have been flat and if there were no cash out refis, GDP would have declined 3.1%. (Update: assuming cash out goes to consumption) And that is just the direct impact and does not include any secondary effects of layoffs in the housing and retail industries.

I do agree with Greenspan's comment: it is difficult to predict how disruptive the coming adjustment will be, but a recession is likely.