"The FBI correctly identified the epidemic of mortgage control fraud at such an early point that the financial crisis could have been averted had the Bush administration acted with even minimal competence. To understand the crisis we have to focus on how the mortgage fraud epidemic produced widespread accounting fraud.
...Fraud is the principal credit risk of nonprime mortgage lending. It is impossible to detect fraud without reviewing a sample of the loan files. Paper loan files are bulky, so they are photographed and the images are stored on computer tapes. Unfortunately, "most investors" (the large commercial and investment banks that purchased nonprime loans and pooled them to create financial derivatives) did not review the loan files before purchasing nonprime loans and did not even require the lender to provide loan tapes.
The rating agencies never reviewed samples of loan files before giving AAA ratings to nonprime mortgage financial derivatives. The "AAA" rating is supposed to indicate that there is virtually no credit risk -- the risk is equivalent to U.S. government bonds, which finance refers to as "risk-free." We know that the rating agencies attained their lucrative profits because they gave AAA ratings to nonprime financial derivatives exposed to staggering default risk. A graph of their profits in this era rises like a stairway to heaven
. We also know that turning a blind eye to the mortgage fraud epidemic was the only way the rating agencies could hope to attain those profits. If they had reviewed even small samples of nonprime loans they would have had only two choices: (1) rating them as toxic waste, which would have made it impossible to sell the nonprime financial derivatives or (2) documenting that they were committing, and aiding and abetting, accounting control fraud.
Worse, the S&P document demonstrates that the investment and commercial banks that purchased nonprime loans, pooled them to create financial derivatives, and sold them to others engaged in the same willful blindness. They did not review samples of loan files because doing so would have exposed the toxic nature of the assets they were buying and selling. The entire business was premised on a massive lie -- that fraudulent, toxic nonprime mortgage loans were virtually risk-free. The lie was so blatant that the banks even pooled loans that were known in the trade as "liar's loans" and obtained AAA ratings despite FBI warnings that mortgage fraud was "epidemic." The supposedly most financially sophisticated entities in the world -- in the core of their expertise, evaluating credit risk -- did not undertake the most basic and essential step to evaluate the most dangerous credit risk. They did not review the loan files. In the short and intermediate-term this optimized their accounting fraud but it was also certain to destroy the corporation if it purchased or retained significant nonprime paper."
http://www.huffingtonpost.com/william-k-black/the-two-documents-everyon_b_169813.html
There are people who know how to clean this mess up, investigate it and put the criminals away. Obama has decided not to do what absolutely needs to be done to avoid this happening again. The crininals that flourished during Bush continue to flourish today. Inexcusable.