PRE-POSTSCRIPT: You know, the house over to the left might have benefited from a good plumber -- like Joe, say ....
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The idea floating around (one version proposed by McCain) that the government should buy up "troubled" mortgages is as misguided notion as they come. "Troubled" itself is hard to define. Is it determined by the borrowers' difficulties in making loan payments? Or by loan default? Or is it just a mortgage "under water," valued at more than the house it's attached to? "Troubled" should be limited to, at most, the first two cases.

The housing crisis -- or rather, the house financing crisis -- will have, not one, but many endings, covering a range of possibilities:

• Borrowers paying reliably on mortgages "under water"
• Borrowers with payment difficulties who renegotiate their loans (lower interest rate)
• Borrowers in default who might renegotiate or just move out, to rentals
• Borrowers in foreclosure who must move out, or stay and rent with option to buy

At this point, the last category is small, a little over a percent of mortgages. The range of options is enough to make simply throwing people out on the street an unnecessarily harsh choice. Banks and lenders will not want to sit on unoccupied, non-income-generating property in any case. Both lenders and borrowers will unavoidably take some losses along the way.

Except for directly intervening with borrowers with Fannie and Freddie loans, it's hard to see what role government should take here, except to act as a catalyst. Government should certainly not be engaged in perpetuating the housing bubble; for example, in trying to prop up house prices or encouraging any more subprime lending. If it does anything for the housing market, it should be terminating the ingredients that went into the bubble in the first place.

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The general financial crisis, centered in the credit markets and impacting others (like the stock market), was certainly triggered by the weakness in the subprime mortgage market and exacerbated by falling house prices across the board. But the financial system, as evolved over the last thirty years, has developed intrinsic weaknesses of its own that falling house prices merely exposed. Those dangers are embodied in excessive debt and rationalized in turn by faulty theories about controlling risk.

Many of the supposed culprits -- mortgage bonds and "derivative" securities (essentially, complex, composite repackagings of existing securities); the non-existent "deregulation" of Wall Street; and the alleged merging of investment and commercial banking -- are bogus. These supposed factors are either not real or not capable of producing an unforeseeable credit crisis of this magnitude.

Over the last generation or so, the financial world, American and non-American, the regulated and the regulators, has developed an unhealthy and misplaced confidence in its ability to quantify and manage risk. The crisis we see unfolding now has nothing in the slightest to do with "fraud" or malfeasance on any individual's part.* Traditional regulation is designed to deter and punish such misbehavior, which is multiply times over illegal anyway. A crisis of this type is a result of collective misjudgment and collectively-held false ideas about risk, mixed with a certain level of hubris.

Viewed this way, our present financial troubles start to look less like a crime caper and more like the failure of a complex technological system, like the explosion of the space shuttle Challenger or the sinking of the Titanic. ...

Read more of this post at Kavanna.
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* It has even less to do with "corruption," something outside of Wall Street's power, since that requires the granting of political favors. You have to look to K Street (in Washington) for that.