The left's hope is that derivatives are so poorly understood that people can be convinced that turmoil in the market for credit default swaps -- an effect of soured mortgage loans -- is actually a cause of this crisis. Credit default swaps (CDS) are insurance policies against companies or investment vehicles going bankrupt and being unable to pay their creditors. This insurance is cheap when things are going well, and very expensive when investors expect the relevant entities to fail. Turns out that the markets for CDS and other derivatives not tied to the housing crisis are functioning normally.
in an amazing coincidence, it is the failure -- or the expected failure -- of entities with heavy exposure to toxic mortgages that is putting extreme financial strain on those who sold insurance. But the problem can't possibly be the toxic mortgages encouraged by Washington, according to the politicians. It must be the system of insuring against the collapse of those who bought the mortgages.