Are you looking for Nirvana when you invest? Forget about it. It doesn't exist.

Let's start with two big losers that relied on financial data and ended up on the trash heap. First we have Long Term Capital. Founded by John Meriwether, Robert C. Merton, and Myron Scholes. They formed the largest hedge fund in the U.S. in the 1990s with an estimated 4.6 billion in capital. Merton and Scholes had won the Nobel Prize in economics for developing a pricing model for options called the "Black Scholes Model." Since both men had won the Nobel Prize, this should have been Nirvana. Now comes along the Russian financial crisis and Long Term Capital was on the wrong side of history. They took such a beating that the Federal Reserve had to help bail them out for a time until they went bust in 2000.

Everyone is trying to figure out the roots of the current financial crisis. You can trace it back to one man, Mr. Li, and a formula that was very misused by Wall Street. Let me start by telling you a story that took place some 30 years ago.

I was sitting in my statistics class and the professor walked in and said, "Today we are going to learn about correlations." He explained that correlation is very simple. It is a single number that describes the degree of relationship between two variables, and that there was a formula in our book we could use. "But right now," he said " it's more important that you learn the concept that a correlation is a single number that describes the degree of relationship between two variables," he repeated, as professors often do. "Your answer will therefore always range between -1 and +1."