Duration Neglect

Duration Neglect is a cognitive bias in behavioral finance where investors evaluate an experience based primarily on the peak intensity or the final outcome, rather than the total duration of the experience. In the context of options trading, a trader might disproportionately focus on the single largest gain or the final loss of a long-term position, ignoring the prolonged period of volatility or theta decay experienced throughout the trade.

This bias often leads to poor decision-making, as traders may overestimate the quality of a strategy that had one successful outcome while ignoring the cumulative negative impact of extended holding costs. By failing to account for the time component, traders often misjudge the risk-adjusted return of their portfolios.

It is a critical psychological factor that distorts the perception of performance in high-frequency trading and long-term crypto holding strategies. Recognizing this bias helps in objective performance evaluation.