America's Riskiest Real Estate Spots

April 7, 2008— -- There's roulette and there's skydiving. Then there's investing in Detroit and Cleveland real estate.

That's especially risky because those markets are in freefall. Lenders have fled, foreclosures are on the rise, homes aren't selling and local economies have stalled.

Given the state of the country's housing market, it wasn't hard to find others like them. To do so, Forbes.com looked at the country's 40 largest metros and combined data on foreclosures, from RealtyTrac, a foreclosure listing service; job growth from the Bureau of Labor Statistics; transaction volume data from Radar Logic, a New York real estate research firm; and vacancy and current inventory rates from the U.S. Census Bureau and ZipRealty, an aggregator of multiple listing service data.

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The riskiest were those that had the highest foreclosure rates, slow job growth (or job loss) and a rash of listed homes. By these measures, Orlando has everything working against it. Other spots, Denver, for example, exhibit negative characteristics like foreclosures, lending problems and vacancies, but are adding jobs, a sign that the local economy can better handle these difficulties.

Before "write-down" entered the national lexicon, the biggest risk facing real estate markets was the prevalence of subprime loans and adjustable rate mortgages. Last year, before the shoe-drop of the credit crunch and the dropping value of banks' loans and debt, we identified ARM-heavy Miami, Fla., Orlando, Fla., and Sacramento, Calif., as the markets most at risk of further fall.

Subprime still matters, as do the concentration of adjustable rate mortgages. Transaction volume, however, especially over the next 12 months is becoming an increasingly important gauge of a market's health. This month the National Association of Realtors reported that sales volume of existing homes was up 2.9 percent, the first such month-to-month rise since July.