Quotulatiousness

September 5, 2011

False ideas about investment risk

Filed under: Economics — Tags: , , , , — Nicholas @ 10:25

Dan Ariely points out that most people have no idea at all about some of the key questions on investment risks:

To this point, we’ve run a number of experiments. In one study, we asked people the same question that financial advisors ask: How much of your final salary will you need in retirement? The common answer was 75 percent. But when we asked how they came up with this figure, the most common refrain turned out to be that that’s what they thought they should answer. And when we probed further and asked where they got this advice, we found that most people heard this from the financial industry. Sort of like two months salary for an engagement ring and one-third of your income for housing, 75 percent was the rule of thumb that they had heard from financial advisors. You see the circularity and the inanity: Financial advisors are asking a question that their customers rely on them for the answer. So what’s the point of the question?!

In our study, we then took a different approach and instead asked people: How do you want to live in retirement? Where do you want to live? What activities you want to engage in? And similar questions geared to assess the quality of life that people expected in retirement. We then took these answers and itemized them, pricing out their retirement based on the things that people said they’d want to do and have in their retirement. Using these calculations, we found that these people (who told us that they will need 75% of their salary) would actually need 135 percent of their final income to live in the way that they want to in retirement. If you think about it, this should not be very surprising: If you add 8 hours (or more) of free time to someone’s day, they will probably not want to spend this extra time by going for long walks on the beach and watching TV — instead they may want to engage in activities that cost money.

You can see why I’m confused about the one-percent-of-assets-under-management business model: Why pay someone to create a portfolio that’s 60 percent too low in its estimation?

And 60% is if you get the risk calculation right. But it turns out the second question is equally problematic. To show this, we also asked people to tell us how much risk they were willing to take with their money, on a ten-point scale. For some people we gave a scale that ranges from 100% in cash on the low end of the risk scale and 85% in stocks and 15% in bonds on the high end of the risk scale. For other people we gave a scale that ranges from 100% in bonds on the low end of the risk scale and buying only derivatives on the high end of the risk scale. And what did we find? People basically looked at the scale and said to themselves “I am a slightly above the mean risk-taker, so let me mark the scale at 6 or 7.” Or they said to themselves “I am a slightly below the mean risk-taker, so let me mark the scale at 4 or 5.” In essence, people have no idea what their risk attitude is, and if they are given different types of scales they end up reporting their risk attitude to be very different.

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