Harry Markowitz, the 1990 Nobel Prize winner for pioneering work in the theory of financial economics:

I should have computed the historical covariance of the asset classes and drawn an efficient frontier. Instead I visualized my grief if the stock market went way up and I wasn’t in it – or if it went way down and I was completely in it. My intention was to minimize my future regret, so I split my [pension scheme] contributions 50/50 between bonds [risk-free assets] and equities [risky assets].

Из статьи, которую сейчас читаю: Brain, emotion and decision making: the paradigmatic example of regret