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Behavioral Finance is a wide topic, which I believe is still today underestimated by many financial professionals. How can it be used by quants? Well, in portfolio optimization it can be used "as an overlay" in the form of constraints where the optimal portfolio can not be too different from the current portfolio, because clients have behavioral biases ...


I believe there are several questions being asked. Since there are several behavioural patters that could be measured I suggest to first identify which is of most interest. See Hersh for a good summary of patterns. For most behavioural patterns that I can think of you would need transaction data.

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