The chart of the three is here. But its going to be the next chart that tells the story:

What is the trend of the monthly losses for each region? Amazingly, they are behaving very similarly. This implies that its a national phenomenon. Its not 'different here.' Now, we're at the point of rolling losses. I'm watching the ex-urbs of LA almost stabilize (they're still dropping) while the inner core is now pulling down Case-Shiller. Where I want to buy, my wife is seeing 30k to 50k drops per Month!
Notice how all three cities have stabilized at about a 2.5% drop per month? Also note the last spring selling season. For March through July, the rate of drop decreased during the seasonal 'sellers market.' It wouldn't surprise me if DC's rate of drop went to near zero during the selling season. I suspect Miami and LA will show much smaller 'seller season' trends in 2009.
August through February is the 'buyers season.' Its very clear on last year's Case-Shiller derivative. The only question is how will employment and the overall economy effect buying?

We've had two straight years of declining home values. I stand by my prediction that 2009 will be the most brutal year for price drops nationally. With the Asian markets now net sellers of Fannie and Freddie backed bonds... The 729k 'conforming jumbo' is a bit of a joke. They're going to be tough to aquire.
Do note that in the case of LA, these 2.5%/month price drops were occuring while everything possible was being done to slow down the entry of foreclosures onto the market. All those stupid laws have done is:
1. Tighten up mortgage rules
2. Delay the introduction of inventory until the spring buying season (which I call 'sellers season' as it is the best time to sell a home during the year).
Some areas will fall harder than the cities I ploted. I have no desire to beat up on Detroit, so I'll do no more than mention it. Las Vegas is doomed. Same with Phoenix; both are dropping faster than the examples listed.
Doing some simple charting, we won't see an increase in Case-Shiller before the 2011 selling season. There is quite a bit of downside potential between now and then. Oh, if you get the bargain of a lifetime, go ahead and buy. I'm going to wait until 2010. I still see price drops ahead greater than $100k. Thus, its not yet time to buy.
Got Popcorn?
Neil
