![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhag1oqZ5ULi7RuNScCy2tY6Hy6FLfRLojfGxRbkrNjj1Ji_YuNi0nX2f0akm9P197dVPq1IXVTDiEKqNP3r331C9_NHNC9UgnW1hDQntQkNSDoRC2j733tFEJP2js4hRkg3e5BpUZ_0lQ/s400/sdhpi-forecast.png)
"Fundamentals" curve assumes more or less unchanged interest rates and steady wage inflation that averages 3%/year going forward. For the top tier I use a soft-landing scenario (exponential decay to fundamentals). To extrapolate two other tiers, I use quadratic approximations of season-adjusted HPI points from the last 9 months.
Summary of predictions:
* Aggregate Case-Shiller bottom in February '09 in 150-155 range (late '02 pricing)
* Top tier: 5% decline followed by many years of scraping along the bottom
* Middle tier: 6-8% decline followed by a mild bounce-back
Caveats:
* Bottom tier may get some support from FHA short-refinancing program, in which case the decline will not be so severe.
* I'm assuming that GSE conforming-jumbo loans and higher FHA loan limits stay with us until the return of a healthy jumbo market. Technically, they are supposed to be discontinued on Dec 31, 2008, but it's likely that loan limits will be extended.
* Interest rates may not stay the same. Here are two alternative scenarios, with rates heading to 5.5% and 7.5% long term, respectively:
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiroxjDq6LJiEnNF2Dy29PC7EjIAM0h6zYjC9zHzz4P8g3s2FTNRqhFo7b6NY6CGnPaVT_ERNOoFdfC2tnFvBvtMs5U5u8paH43nT-FhRdqTOT6Oe4PXxsiUbITTItk2QlWPjBlyescbYQ/s400/sdhpi-forecast-55.png)
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjtMBndWz3tzW3hZG97zIxYbo4wNkjqRUXgRq2kKZPIWE66MPRqHnKZP362V2Ithyphenhyphenh2mE9q4dqBe9axTEL2mNl_QkU6QeB6NaPsBtNz-aM7iGix40GYfIdD_3rv9jJfWMLzE5451OdVbV8/s400/sdhpi-forecast-75.png)
I'm not a prophet and I may be seriously off, only time will tell.
UPDATE: recalculated the "fundamentals" curve using actual CPI and mortgage rate data.