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Behavior Gap Round Up, 9.25.09

What It Means to Predict a Crisis

If you play Russian Roulette with 1 bullet and 100 chambers in your pistol, I can’t predict when the crisis will occur. If you play with 10 bullets, I still can’t predict when the crisis will occur but I can say with certainty that the risk has increased by a factor of ten. Analogously, nothing in modern economics makes it theoretically impossible to forecast that greater leverage and higher than normal price to rental rates, to name just two possibilities, increase the probability of crisis. Nor does modern theory make it theoretically impossible to forecast that conditions are such that if a crisis does occur it will be a big one.

Insight: Equities carry too much risk

Usually at bear market troughs, the S&P 500 goes to silly cheap levels. It did not this time round and, six months and 60 per cent later, there is yet again, in 2007 style, tremendous risk in this market. Never before has the stock market surged this far, this fast, between the time of the low and the time the recession (supposedly) ended. What is “normal” is that the rally ahead of the recovery is 20 per cent. This market is now trading as if we were in the second half of a recovery phase, yet it has not even been fully ascertained the downturn is over.

The Evolution of Overconfidence

The puzzle about overconfidence is its ubiquity. Many studies have shown that most people have an exaggerated sense of their own capabilities, an illusion that they have control over uncontrollable events and are invulnerable to risk. Most people, for example, believe they are above-average drivers, a statistical impossibility. We are all overconfident in one way or another.

But how can such a condition have evolved when overconfidence can lead to destruction of communities and catastrophic loss of life?

…All of this sets the stage for the next question: how best to mitigate the worst side-effects of rampant overconfidence in a society with a dramatically exaggerated sense of its own abilities.