In our view, however, derivatives are financial weapons of mass destruction, carrying dangers that, while now latent, are potentially lethal." That warning was in [Warren] Buffett's 2002 letter to Berkshire shareholders. He saw a future that many others chose to ignore. Wall Street didn't listen to Buffett. Derivatives grew into a massive bubble, from about $100 trillion to $516 trillion by 2007. Despite Buffett's clear warnings, a massive new derivatives bubble is driving the domestic and global economies, a bubble that continues growing today parallel with the subprime-credit meltdown triggering a bear-recession. Data on the five-fold growth of derivatives to $516 trillion in five years comes from the most recent survey by the Bank of International Settlements, the world's clearinghouse for central banks in Basel, Switzerland. Keep in mind that while the $516 trillion "notional" value (maximum in case of a meltdown) of the deals is a good measure of the market's size, the 2007 BIS study notes that the $11 trillion "gross market values provides a more accurate measure of the scale of financial risk transfer taking place in derivatives markets." The fact is, derivatives have become the world's biggest "black market," exceeding the illicit traffic in stuff like arms, drugs, alcohol, gambling, cigarettes, stolen art and pirated movies. Why? Because like all black markets, derivatives are a perfect way of getting rich while avoiding taxes and government regulations. And in today's slowdown, plus a volatile global market, Wall Street knows derivatives remain a lucrative business.