One of the best guides to the danger ahead is Whitney Tilson. He’s an investment fund manager who has made such a name for himself recently that investors, who manage about $10 billion, gathered to hear him last week. Tilson saw, a year ago, that sub-prime mortgages were just the start.

“We had the greatest asset bubble in history and now that bubble is bursting. The single biggest piece of the bubble is the U.S. mortgage market and we’re probably about halfway through the unwinding and bursting of the bubble,” Tilson explains. “It may seem like all the carnage out there, we must be almost finished. But there’s still a lot of pain to come in terms of write-downs and losses that have yet to be recognized.”

In 2007, Tilson teamed up with Amherst Securities, an investment firm that specializes in mortgages. Amherst had done some financial detective work, analyzing the millions of mortgages that were bundled into those mortgage-backed securities that Wall Street was peddling. It found that the sub-primes, loans to the least credit-worthy borrowers, were defaulting. But Amherst also ran the numbers on what were supposed to be higher quality mortgages.

Watch the video below for more…