Behavioral Principle
Belief Perseverance
Once a market view forms, it survives long after the evidence that created it is discredited.
Canonical source: Ross, Lepper & Hubbard, 1975
Articles studying this principle
Commitment Bias: When Holding On Becomes More Expensive Than Letting Go
Commitment Bias causes traders to defend yesterday's decisions with today's evidence. Learn why investors hold losing positions, ignore changing market conditions, and how disciplined decision frameworks help protect capital.
The Allure of the Oracle: Why We Over-rely on Technical Indicators
Despite frequent evidence of their fallibility, market participants often exhibit profound trust in technical indicators. This persistent belief in predictive patterns, even when statistically tenuous, reveals deep-seated cognitive biases. Understanding the subconscious mechanisms driving this over-reliance is crucial for disciplined decision-making.