Yves Smith writes at naked capitalism March 1:

Credit default swaps played a much more central role in the financial crisis than is widely understood, and they continue to get a free pass in financial reform proposals that they do not deserve. As we have discussed on this blog, and recount in more detail in the book ECONNED, central clearing and/or putting them on exchanges are inadequate remedies. Only a small subset of CDS contracts trade often enough for to be suitable for exchange trading. As for central clearing, the logic is that this would provide for consistent and sufficiently large margin to be posted (think of it as a reserve against the ultimate possible insurance payment required on the contract). But unlike real derivatives, CDS are subject to massive price moves (”jump to default’) when a reference entity (the entity on which the CDS is written) defaults or goes into bankruptcy. That large price movement, means that the margin already posted will be insufficient, and there is no guarantee that the counterparty will be able to pony up the amount now due.

But perhaps more important, the idea that CDS have legitimate uses is questionable. They are used to hedge credit risk (sometimes) yet their pricing, per Bloomberg or any of the common commercial models, price CDS based on volatility, which is not based on any assessment of the underlying credit. So the idea that the pricing reflects default risk is spurious; indeed, CDS failed abysmally in predicting financial firm default risk during the crisis (Lehman was a particularly vivid illustration). But they serve to perpetuate the erosion of proper credit analysis (why bother if you can just lay off the risk?).

To read more, click this link:

http://www.nakedcapitalism.com/2010/03/so-why-hasnt-the-credit-default-swaps-casino-been-shut-down.html