Imagine a world where everyone is equally risk-averse, and where there are two assets available: You can hold stock in an umbrella company, or you can hold stock in a sunscreen company. Depending on the (quite unpredictable) weather, one of these stocks is sure to gain value at 100% a year while the other is sure to lose value at 95% a year, but it’s impossible to know which is which.
Given this, the smart thing to do is to hold a balanced portfolio of the two assets and earn a comfortable 5% per year. Most people in this imaginary world are smart enough to figure this out. But a small number are stupid enough to put all their eggs in one or the other basket. Half these people are quickly wiped out; the other half become super-rich.
Now we have a society in which nobody smart is especially rich, and everyone rich is especially dumb.
Question: Does this parable contribute anything useful to understanding some aspect (obviously not all aspects!) of the wealth distribution in the world we inhabit? Discuss.
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