The Economist IT HAS long been known in financial markets that people are so reluctant to lose money that they will take big risks to avoid it. If you give the average person a 90% chance of winning a little money or a 10% chance of winning a lot, he will most likely take the option that offers him at least a little bit of cash. But offer him a 90% chance of losing a little money or a 10% chance of losing a lot, and he will opt for the latter. A recent study finds that stress exacerbates this.

Anthony Porcelli and Mauricio Delgado, psychologists at Rutgers University in New Jersey, set out to analyse the sorts of financial risks people were willing to take when calm or stressed. They knew finance could be stressful at the best of times. Stockbrokers, for instance, make important financial decisions in split seconds in conditions that are sometimes noisy, hot and socially tense, they noted in Psychological Science, a journal. Does this affect their judgment?

The experiment involved students playing a gambling game. To stimulate stress, for part of the game half had their main hand in very cold water. The students faced financial decisions that varied in both the degree of risk and the amount of money that could be won or lost. They could choose between, say, an 80% chance of losing 75 cents and a 20% chance of losing $3 or an 80% chance of winning 75 cents and a 20% chance of winning $3. They could keep anything they won.

Read the full article here.

Stress testing
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