Most investors probably think that when an investment ratings service like Moody's, Standard & Poors or Fitch gives a company, financial institution or security the highest rating of "AAA," it carries the least possible level of risk. Most investors would think that this rating would be reserved for United States Treasuries and only the most secure of companies like Berkshire Hathaway (NYSE: BRK.A), Johnson & Johnson (NYSE: JNJ), or United Parcel Service (NYSE: UPS). Actually, this happens to be the case, and these companies are among the very few to receive AAA ratings outside of financial institutions.

So what happened in the case of the Collateralized Debt Obligation (CDOs), where the ratings agencies determined that high-risk securities batched together had a smaller chance of default than the individual securities? Perhaps that is the case, but triple-A? Well, it seems to me that large investment banks knew they needed the AAA ratings to have a marketable security. They went to the ratings agencies that understood this and the agencies created the rational or plausible deniability to support the rating. This may be a bit harsh, but it does seem that the ratings agencies were working in reverse: first establish the rating and then the support for the rating. The ratings services are all heading for cover and many of the previously AAA-rated securities are being re-evaluated.