In an article describing how co-ops are much better positioned for the downturn because, unlike condos, their position in foreclosure proceedings is senior to the bank, comes this doozy of a quote from the president of a property management company in Manhattan:
I think it’s safe to say that the value of any apartment purchased in the last two years is less than its purchase price. The simple calculation is that if you bought an apartment a year ago and financed 90 percent of the purchase price, as many did, and now it’s worth 20 percent less, you’re upside-down as an owner.
That's another reason why co-ops are in better shape: Most owners had to put down a minimum of 20 percent when they bought.
The Downside for Condos in a Downturn [NY Times]