Tim Geithner's Black Hole

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Here's the problem: Today's true market value of the U.S. banks' toxic assets (that ugly stuff that needs to be removed from bank balance sheets before the economy can recover) amounts to between 5 and 30 cents on the dollar. To remain solvent, however, the banks say they need a valuation of 50 to 60 cents on the dollar. Translation: as much as another $2 trillion taxpayer bailout.

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The logical alternative -- talk show hosts' solution du jour -- is to temporarily restructure or nationalize the banks and leave taxpayers alone. Remove the toxic assets, replace management and cut the too-big-to-fail financial dinosaurs into smaller, nimbler entities. Then reprivatize these smaller banks and let the recovery begin.

Oh, if it were that simple. I suspect Obama's advisers would like nothing more than to dismantle an irresponsible firm such as Citigroup. They are afraid to do so, for one reason: All the big banks are connected to a potentially lethal web of paper insurance instruments called credit default swaps. These paper derivatives have become our financial system's new master.

The theory holds that dismantling a big bank could unravel this paper market, with catastrophic global financial consequences. Or not. Nobody knows, because the market for these unregulated financial derivatives, amounting potentially to over $40 trillion (by comparison, global gross domestic product is now not much more than $60 trillion), is the financial equivalent of uncharted waters.