Risk tolerance is not a stable characteristic. It varies systematically with market conditions, recent portfolio performance, and the emotional state of the investor at the moment of assessment. Risk tolerance surveys administered during bull markets consistently overestimate the investor's genuine capacity to sustain losses without changing strategy—because the investor completing the survey is in an emotional state that is maximally favourable to risk acceptance, having recently experienced positive returns and operating in a social environment that validates equity investment. The portfolio that is constructed on the basis of this survey will be too aggressive for the investor's actual emotional capacity, and the mismatch will be revealed at the worst possible time.
The specific mechanism is the recency bias that shapes risk perception. An investor who has experienced three years of positive equity returns perceives equity investment as having worked—as a strategy that has been validated by experience. Her assessment of the downside risk is anchored to recent experience rather than to the full historical distribution of equity returns, which includes significant and sustained declines. The losses that she would experience in a bear market feel abstract and hypothetical, while the gains she has recently experienced feel vivid and real. This asymmetry produces a stated risk tolerance that reflects the vividness of recent gains rather than the genuine capacity to sustain the losses that equities periodically deliver.
The portfolio implications of bull-market risk tolerance surveys are significant. The investor who assesses herself as a high-risk-tolerance investor during a bull market will be allocated to an aggressive portfolio—perhaps eighty or ninety percent equities—that is appropriate for a genuinely high-risk-tolerance investor but that she will be unable to maintain through a significant bear market. When the bear market arrives, the aggressive portfolio declines substantially, and the investor's actual risk tolerance—revealed by the emotional reality of the decline rather than by the hypothetical assessment—proves to be much lower than the survey suggested. The resulting exit from equities at the bottom of the decline is the most expensive consequence of the initial misassessment.
A more accurate assessment of risk tolerance would require evaluating the investor's responses in conditions that more closely approximate the emotional state of a bear market: after showing her historical bear market data in detail, after walking through the specific financial consequences of a forty percent decline in her actual portfolio, and after asking her to imagine the social and emotional context of that decline—the media coverage, the conversations with colleagues, the psychological experience of watching accumulated wealth diminish. This more rigorous assessment would produce lower stated risk tolerances that are more accurately predictive of actual behaviour under stress.
The practical response is to build in a conservative adjustment to whatever risk tolerance assessment produces. The investor who assesses herself as a high-risk-tolerance investor should consider whether her assessment would be the same if markets had recently declined thirty percent. If the honest answer is uncertain, the appropriate portfolio is one constructed for the lower risk tolerance—one that she will be able to maintain through the difficult periods that will inevitably arrive, rather than one that is optimal for the high-tolerance investor she believes herself to be in calm market conditions.