To respond to the above posts since my last one, every one of them is basically correct. Same old story, everyone in the chain makes money - except for the end buyers of this product.
The majority of fixed income portfolios (that would be banks, insurance companies, credit unions, pension funds, mutual funds etc) in the US are affected by the subprime debacle in one way or the other. If it isn't in direct lending exposure to bad loans, its by owning ABS CP or Home Equity ABS, Subprime ABS, CMOs...you get the picture.
Its legion....and you only hear about each problem as it gets released, one company at a time. One by one, the Street, major banks, and major mortgage companies have come clean about writeoffs and losses, and they are still coming out.
You haven't even HEARD about the rest of the people affected.
How to play as a trader....VERY hard to tell at this minute with the announcement of the trio rescue for subprime mortgage resets, freezing them etc. ( I am against any and all rescues) But they are determined to do it. I think that will cause a short-term run up across the board, but eventually, they'll realize they can't stop the whole real estate market bubble from deflating, and markets will continue to decline - just my macro viewpoint.
And its very late in the cycle to make money shorting anything in particular - most have already been hammered. The last trade was short AMBAC and MBIA.