The idea is a difficult one to grasp: that a decline in your house value can help you, as long as you’re moving to a more expensive house in a similar real-estate market. It’s worth looking at an example.
Imagine that a family lives in a three-bedroom house that would have sold last summer for $500,000. It wants to move to a four-bedroom house that was worth $700,000 at the time.
I’m sure you’ll want to read all about this one.
Complete article: Trading Up in a Down Market – By David Leonhardt, The New York Times