At the end of last week's letter on the whole mortgage foreclosure mess, I wrote:

"All those subprime and Alt-A mortgages written in the middle of the last decade? They were packaged and sold in securities. They have had huge losses. But those securities had representations and warranties about what was in them. And guess what, the investment banks may have stretched credibility about those warranties. There is the real probability that the investment banks that sold them are going to have to buy them back. We are talking the potential for multiple hundreds of billions of dollars in losses that will have to be eaten by the large investment banks. We will get into details, but it could create the potential for some banks to have real problems."

Real problems indeed. Seems the Fed, PIMCO, and others are suing Countrywide over this very topic. We will go into detail later in this week's letter, covering the massive fraud involved in the sale of mortgage-backed securities. Frankly, this is scandalous. It is almost too much to contemplate, but I will make an effort.

But first, let me acknowledge the huge deluge of emails I got over last week's letter, the most I can ever remember. I thought about just making this week's letter a response to many of them, but decided I needed to go ahead and finish the topic at hand. Maybe another time. As a side note, I quoted a letter that came to me anonymously via David Kotok. I said if I found out who wrote it, I would give them credit. It was originally written by Gonzalo Liro, at www.gonzalolira.blogspot.com.

Many of you wrote to point out that his argument about the tracking of title was not correct, but others pointed out many other issues as well. This is one of the most complex problems we face, and I got a lot of good information from readers. It just makes me wish I had our new web site finished so you could avail yourselves of the wisdom among my readers. We are close, down to final changes. And now, on to today's letter.

From ghoulies and ghosties
And long-leggedy beasties
And things that go bump in the night,
Good Lord, deliver us!

-Traditional Scottish Prayer

It's been a long time since we have looked in my worry closet, but there are definitely bumping sounds coming from behind the door. While largely over-looked, Bank of America closed down an "enhanced cash" fund and did the unthinkable and broke the buck. But the real story is even worse. I make the suggestion that you look at your cash funds and see what is in its portfolio. You may want to redeem ahead of the crowd.

This week was not pretty for stocks. It all started off with the announcement of a special 80-100 billion dollar fund orchestrated by the US Treasury to bail out something called an SIV. Then Caterpillar gave negative guidance this morning, especially on its US business and the selling began in earnest. October 19 is still not a friendly day to the stock market 20 years later. But it was a great week for bonds. One-month treasury bills dropped 60 basis points in one day in a real flight to short-term quality, and the entire yield curve moved down substantially.

But it all circles back around to the subprime mortgage mess. It is clearly having an effect on the economy (witness the Caterpillar guidance, which used the "R" word - that's recession - in association with some of its prime customers, like housing). The subprime mortgage problems, which we were assured only a few months ago would be contained, have now spread to what Paul McCulley calls the Shadow Banking System. In this week's letter, we talk about something called a Structured Investment Vehicle or SIV. There is a real crisis brewing that has serious implications for Fed policy, credit spreads, and your ability to get a loan. There is a lot of ground to cover, so let's jump right in.

This week we learned that Structured Investment Vehicles or SIVs should more properly be termed SIGs or Structured Investment Garbage. Several SIVs worth over $20 billion are closing shop, and investors will lose money. More SIVs are selling assets to meet loan demands. SIVs had issued at the peak about $400 billion worth of asset-backed commercial paper. The total of asset-backed commercial paper was $1.2 trillion. Since July, that has plummeted, nose-dived, crashed to $888 billion, and is on its way to a small fraction of that. In effect, we are taking a trillion dollars of financing for a wide variety of things we need, like credit cards, autos, homes, and corporate loans out of the credit market. That is going to have an impact.