There is a welcome chance for many of us to breathe, as the lower and middle end of the housing market is now stabilizing.  However, the higher end still seems to be wobbly and so the people up there must be ready now before they have to gasp for breath.

If you belong to that group that currently has an increased demand for oxygen—in other words, if you sell in the upper end of the market—The Wall Street Journal has an outstanding article for you to read:

While subprime mortgages sparked the first round of housing problems two years ago, now “troubles are lurking further up the food chain,”  says Joshua Shapiro, chief U.S. economist at MFR Inc. White-collar job losses have accelerated while more adjustable-rate loans to prime borrowers are resetting to higher payments. “You put all that together, it leads me to believe that the next leg down on home prices is going to come from the top,” he says.

To be sure, the affluent housing market is substantially smaller than the mass market. Sales of existing homes priced over $750,000 accounted for 2.3% of all sales in the first quarter of this year, compared to 4.4% of the housing market in 2007, according to the National Association of Realtors.

Still, the distress in high-end market has implications for consumer spending: the top 10% of U.S. households in terms of income accounted for 23% of consumer spending in 2007, according to government statistics. As those households watch their home equity evaporate, they are more reluctant to spend on housing upgrades or other items.

Inventory of expensive homes is rising. Overall, the inventory of unsold homes in June was enough to last 9.4 months at the current selling pace, down from 11 months a year ago, according to the NAR. But the supply of unsold homes priced above $750,000 swelled to around 17 months in June, up from a 14.5-month backlog one year ago. A recent forecast by analysts at J.P. Morgan Chase & Co. said it would take until at least 2012 for the expensive-home market to recover and that peak-to-trough declines could surpass 60%, compared to 40% for the rest of the market.