Hindsight Bias in Options Pricing

Hindsight bias in options pricing occurs when traders look back at historical volatility or specific price movements and assume they should have priced an option differently. They may claim that a specific black swan event in the crypto market was obvious, leading them to believe they should have bought cheap out-of-the-money puts.

This retrospective view ignores the fact that at the time of the trade, the market was pricing in different expectations based on available data. It can lead to the flawed belief that one can consistently outsmart the market's implied volatility models.

This thinking often causes traders to over-adjust their models based on a single past event, failing to account for the probabilistic nature of the Greeks. By treating historical outcomes as inevitable, they neglect the necessary rigor of risk sensitivity analysis.

It undermines the objective evaluation of option premiums and hedging strategies. This bias prevents a realistic assessment of the cost of protection versus the probability of a move.

Ultimately, it leads to poor future pricing decisions because the trader is fighting the last war.