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Will subprime meltdown cost $4 trillion, $400 billion, or $104 billion?

It looks like people in power are getting beyond the point of denying that subprime is a problem. And now they're onto the next stage of trying to decide just how big a problem it is. I have seen estimates ranging from as high as $4 trillion to as little as $104 billion. (This is one area where the son will beat the father. Bush I's Savings & Loan crisis cost $240 billion but Bush II's looks likely to be far more costly.)

While each estimate covers different aspects of the cost, the big questions that need to be answered are:

  • What caused the problem?
  • What can and should be done to minimize the damage? and
  • What changes can be made to keep it from happening again?

I don't have real answers to these questions but I think a look at the different estimates of the subprime mortgage meltdown's damage can shed some light on the problem. Here's my take on the three estimates:

  • $4 trillion. Several economists estimate the loss of home price wealth at between $2 trillion and $4 trillion in the wake of the collapse of the subprime mortgage market. The basic logic of this figure is that foreclosures on bad loans throw more houses on the market. In order for these homes to sell -- given lower demand -- their prices must drop. This decline seems reasonable assuming a 15% to 20% drop in housing value which currently totals $21 trillion.
  • $400 billion. Some economists estimate that financial firms could face aggregate losses of $400 billion from expanding troubles related to the subprime mortgage market fallout. I am not quite sure I understand the underlying assumptions for this estimate.
  • $104 billion. By my calculation, it appears that the Joint Economic Committee of Congress has come up with a $104 billion cost -- which includes $71 billion in lost real estate wealth from foreclosures on subprime loans, $32 billion in lost value for homes in the neighborhood of foreclosed houses, and $917 million in lost property tax revenue to state and local governments.

As for those three questions, I think the big lesson to bear in mind is that housing is an economic system consisting of many participants. It's impossible to understand the problem or to envision a solution without looking at all the parts of the system, what motivates them and how they interact.

For instance, it would be easy to blame the borrowers who took on loans to buy houses that they knew they couldn't afford.

  • But the two million foreclosures likely by the end of 2008 is going to cost those borrowers their homes.
  • They were encouraged to lie on their mortgage applications by unscrupulous mortgage brokers.
  • And those brokers were getting big commissions from mortgage lenders.
  • The lenders were getting fees from the investment banks that packaged the mortgages into mortgage-backed securities (MBSs)
  • The credit rating agencies got big fees from the investment banks for wrapping the MBSs in gold-plated AAA ratings
  • The investment banks got fees from investors who bought the MBSs
  • And the investors got above average yields for buying them -- until the house of cards fell apart.

This financing chain does not even take into account all the jobs related to building houses -- which includes design, construction, building materials, transportation, and furniture.

If we keep this financing system in place, then it needs to be much more honest. This means no more liar loans, no more confusing loan terms pushed by greedy brokers, and no more MBSs valued based on mathematical models. Such a system would be much smaller. That is either housing prices would need to drop to make them affordable to people with less money or fewer people would own the higher priced homes.

It's a big problem. What do you think ought to be done?

Peter Cohan is President of Peter S. Cohan & Associates. He also teaches management at Babson College and edits The Cohan Letter.

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Last updated: December 02, 2008: 02:01 PM

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