MBS were invested by mon and pop pension fund and they lost it I Get that and I get that it is sad and BS etc .. not saying that this was good ...
I am purely looking at it from financial maths point of view my simple proposition is money did not disappear it changed hands.
( keeping brokerage and cost aside for this example)
-Bank has 100 to start loan book
- People borrow 100 and buy houses worth 100 ( sellers and people involved in selling of houses of houses get 100)
- Bank makes an MBS company and sells it's shares for 105 ( Banks get the 100 back)
People through pension funds purchase the MBS for 105
- More bad quality MBS created
- Houses prices collapse
- People who bought the MBS at 105 loose THE MBS IS WORTH say 10 ( Cant be that low as houses and land still has some value but lets assume it is)
BUT THE ORIGINAL 100 that the sellers got is still in the economy ! where did it go?