21, No need to argue with this kind of people.

You do not believe a guy from IT (well, I do not know if he really knows IT, probably does not know the difference of layered structure) would know any thing meaningful about finance.

If he was really a CDO expert, he shall be able to educate public about this:

CDO's risk mathematic model that todays CDO derivatives are based up on:

Who created it
What is the algorithm
What deficiency of the model that cause the demise of CDO

Yeah, he can google it, but I know he wont understand it.

So why argue with one who claim himself as an expert while really knows nothing even in his claimed profession?