Definition: Anchoring and Adjustment Biases

Anchoring and adjustment biases are cognitive biases that affect decision-making in the field of finance. These biases occur when individuals rely too heavily on initial pieces of information (the anchor) and make subsequent judgments or adjustments based on that initial information, even if it is irrelevant or inaccurate.

Anchoring Bias

Anchoring bias refers to the tendency of individuals to rely heavily on the first piece of information they receive when making decisions. This initial information serves as a mental anchor, influencing subsequent judgments and decisions. Even when presented with new and relevant information, individuals tend to adjust their judgments insufficiently from the initial anchor.

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For example, when valuing a company, an investor may be influenced by the first price estimate they come across. This initial estimate becomes the anchor, and subsequent valuations are adjusted based on this anchor. If the initial estimate is too high or too low, it can lead to biased valuations and potentially poor investment decisions.

Adjustment Bias

Adjustment bias occurs when individuals fail to adjust their judgments or decisions sufficiently from an initial anchor. This bias can lead to under-adjustment or over-adjustment, depending on the specific circumstances.

Under-adjustment happens when individuals do not adjust their judgments enough from the initial anchor. This can occur when the anchor is perceived as highly relevant or credible, leading individuals to stick closely to the initial information and neglect other relevant factors. As a result, their decisions may be biased and not fully reflect the available information.

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Over-adjustment, on the other hand, occurs when individuals overcorrect their judgments or decisions from the initial anchor. This can happen when individuals perceive the initial anchor as less relevant or credible and overcompensate by making excessive adjustments. Over-adjustment can also lead to biased decisions that do not accurately reflect the true value or risk of a financial asset or investment.

Impact on Financial Decision-Making

Anchoring and adjustment biases can have significant implications for financial decision-making. These biases can lead to inaccurate valuations, suboptimal investment choices, and potentially increased risks. Investors and financial professionals need to be aware of these biases and actively work to mitigate their effects.

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By recognizing the presence of anchoring and adjustment biases, individuals can strive to gather and consider a wide range of relevant information, critically evaluate initial anchors, and make more informed and unbiased financial decisions.

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