The high-water mark for Bear Stearns was 2003. The dollar was falling. A wave of scandals had just swept through the financial industry. The stock market was in a swoon. But Bear Stearns was an exception. In the first quarter of that year, its earnings jumped fifty-five per cent. Its return on equity was the highest on Wall Street. The firm’s mortgage business was booming. Since Bear Stearns’s founding, in 1923, it had always been a kind of also-ran to its more blue-chip counterparts, like Goldman Sachs and Morgan Stanley. But that year Fortune named it the best financial company to work for. “We are hitting on all 99 cylinders,’’ Jimmy Cayne told a reporter for the Times, in the spring of that year, “so you have to ask yourself, What can we do better? And I just can’t decide what that might be.’’ He went on, “Everyone says that when the markets turn around, we will suffer. But let me tell you, we are going to surprise some people this time around. Bear Stearns is a great place to be.’’
With the benefit of hindsight, Cayne’s words read like the purest hubris. But in 2003 they would have seemed banal. These are the kinds of things that bankers say. More precisely—and here is where psychological failure becomes more problematic still—these are the kinds of things that bankers are expected to say. Investment banks are able to borrow billions of dollars and make huge trades because, at the end of the day, their counterparties believe they are capable of making good on their promises. Wall Street is a confidence game, in the strictest sense of that phrase.
This is what social scientists mean when they say that human overconfidence can be an adaptive trait. “In conflicts involving mutual assessment, an exaggerated assessment of the probability of winning increases the probability of winning,” Richard Wrangham, a biological anthropologist at Harvard, writes. “Selection therefore favors this form of overconfidence.” Winners know how to bluff. And who bluffs the best? The person who, instead of pretending to be stronger than he is, actually believes himself to be stronger than he is. According to Wrangham, self-deception reduces the chances of “behavioral leakage”; that is, of “inadvertently revealing the truth through an inappropriate behavior.” This much is in keeping with what some psychologists have been telling us for years—that it can be useful to be especially optimistic about how attractive our spouse is, or how marketable our new idea is. In the words of the social psychologist Roy Baumeister, humans have an “optimal margin of illusion.”