MassMutual became the latest big investor to admit losing money because of Bernard Madoff.

According to Wall Street Journal, the company's Tremont Financial Group lost $3 billion -- more than half of its assets -- because of Madoff's $50 billion scam. Then there's the problem of disclosure.

"Tremont marketing documents did not always disclose the relationship between Mr. Madoff and the feeder funds, even when mentioning other investment managers," the paper said.

So let me get this straight: MassMutual entrusted some of its investors' money to one of the supposed geniuses of Wall Street and did not want anyone to know? Maybe the company did not want its customers to know that it was collecting fees that it did not really earn. I suspect many aggrieved investors will sue. I sympathize with their plight, ,but I do not feel sorry for people who invested with Madoff directly.

Many Madoff customers turned a blind eye to many red flags that should have sent them running for the hills. First of all, no one understood the Madoff's "investing philosophy." Questions about his strategy went unanswered.

This post is part of a series on some of the most memorable companies that have disappeared.

I credit Nick Leeson for creating jobs for lots of my friends. Back in 1995, when he single-handedly brought down Barings Bank with currency trading run amok, I had never heard the term "risk management." But I soon started hearing right and left of friends getting highly paid jobs at financial firms in the "risk management" department.

Apparently, after Mr. Leeson lost $1.4 billion dollars in unauthorized trading rendering Barings insolvent, financial institutions around the world decided to put in more rigorous systems of checks and balances that would keep such things from happening. Hence, newly expanded risk management departments.

Founded in 1762, Barings Bank was the oldest merchant bank in London, financed the Napoleonic Wars, and was the Queen of England's own bank.