Inside Wall Street's Culture Of Risk

On the 31st floor of a skyscraper overlooking Times Square one recent spring day, a dozen or so of Lehman Brothers Inc.'s (LEH ) top executives filed into a conference room to run through risks, relive past financial crises, and worry about new ones. They analyzed how much money the firm might lose if the markets were buffeted like they were after the terrorist attacks of 2001. They pored over complicated risk models showing how tens of thousands of trading positions and financial contracts with clients would fare in the event of an Avian flu epidemic. They tested all conceivable scenarios that might put Lehman in harm's way. "We are in the business of risk management 24/7, 365 days a year," says Chief Administrative Officer David Goldfarb.

Wall Street has always been about taking risk. But never has the "R" word been such an obsession for the men and women who rule the nation's biggest investment banks. Never have they had to reconcile so many bets made on so many fronts. The conditions have been ripe. Historically low interest rates and relatively calm markets in the last few years have allowed a new type of firm to flourish, one that acts primarily as a trader and only secondarily as a traditional investment bank, underwriting securities and advising on mergers.