You are right, daniel_m, I was just trying to point out that supply and demand is more complex than a simple pair of numbers (the quantity of demand vs. the quantity of supply). One must look at a supply curve (number of housing units available vs. price) and a demand curve (number of housing buyers in the market vs. price). (OK, its more complex than that cuz their are multiple coupled curves by geographic area and house configuration).
The point that many are trying to make is that mortgage rates have artificially inflated the demand curve -- although buyers have not increased the monthly payments that they can afford, low interest rates mean that they can afford to "pay" high equity price levels. The inflated demand curve has evn fed on itself because people who are selling at inflated prices can use the added equity plus added buying power to buy an even more expensive house. Finally, the surging real-estate market and tanking stock market create huge psychological forces to more money into real estate (stocks are going down and real estate can only go upm, right?) In many markets, the supply curve is trying to chase this upsurge in demand -- current owners are selling at inflated prices and builders are busily creating new subdivisions (or rebuilding smaller homes into high-price luxury homes).
When mortgage rates rise (or lenders become stingy with approvals due to either defaults or a lack of available capital) the demand curve will retreat rapidly. If employment worsens, the demand curve will retreat (fewer people who can buy a house) and the supply curve will expand (more people forced to sell after losing their jobs). Many will find themselves upside-down on their mortgages and declare bankruptcy. Distressed properties and vacant new properties will exacerbate the downward pressure on prices.
Its a self-amplyfying system about to hit the wall.
-Traden4Alpha