REMEMBER "DUE DILIGENCE"???

Tanta wrote back in 2008 that the banksters weren't really all that concerned about the quality of the mortgage pools they were buying because they knew they could turn around and sell the bonds based on the pools.  Now we learn from Felix Salmon that the banks simply ignored the clear signs that there were a bunch of bad loans in the pool:

After submitting the winning bid, the bank would commission Clayton to take a closer look at a representative sample of loans in the pool. Clayton controlled as much as 70% of the market for this service, which is known as third-party due diligence. But Clayton’s not at fault here, and the problem is likely to apply no matter who performed this service.

The size of the representative sample would vary according to the size of the loan pool; it could be anywhere between 5% and 35% of the loans in the pool. Essentially, Clayton would go back to the loans, one by one, and re-underwrite them after the fact, checking that the originator’s underwriting standards were in fact being upheld.

Armed with this information, Citigroup would do two things. First of all, it would take those 582 rejects and put most of them back to the underwriter. Essentially, they said, the loans weren’t as advertised, and they didn’t want them. But Citi would still keep some of them in the pool.

But remember that Clayton had tested only a small portion of the loans in the pool. So Citi knew that if there were a bunch of bad loans among the loans that Clayton tested, there were bound to be even more bad loans among the loans that Clayton had not tested. And those loans it couldn’t put back to the originator, because Citi didn’t know exactly which loans they were.

If there had been any common sense in the investment banks, that would have been the end of the deal. But there wasn’t. Rather than simply telling the originator that its loan pool wasn’t good enough, the investment banks would instead renegotiate the amount of money they were paying for the pool.

THIS IS WHERE THE CIVIL LAW SUITS SHOULD COME IN:

Now here’s the scandal: the investors were never informed of the results of Clayton’s test. The investment banks were perfectly happy to ask for a discount on the loans when they found out how badly-underwritten the loan pool was. But they didn’t pass that discount on to investors, who were kept in the dark about that fact.

(h/t Atrios)