Anchoring To The Price You Paid

The price paid for a holding is a fact about the past. It nonetheless shapes how most people evaluate that holding, and the distortion runs in several directions.

Anchors form from arbitrary numbers

People asked to estimate an unknown quantity are influenced by any number presented beforehand, even one they know is irrelevant. The first figure pulls the estimate towards it.

A purchase price is a particularly strong anchor because it is personally significant and easy to recall. It becomes the reference point for judging everything afterwards.

The market does not share this reference. Prices are set by all participants, none of whom knows or cares what any individual paid.

The break-even point acquires false authority

Investors frequently decide to sell once a holding returns to what they paid. The number carries no information about the asset's prospects.

Waiting to break even means holding for a reason unrelated to the investment case. The decision is being made about the investor's history rather than the holding's future.

The same logic reversed leads to selling winners quickly to lock in a gain, while losses are held in hope of recovery.

Sunk costs are irrelevant to what comes next

The only question a holding presents is whether it belongs in the portfolio now. Money already spent does not change that assessment.

A useful reframing is to ask whether the position would be bought today at the current price. If the answer is no, the purchase price is not a reason to keep it.

This is easier to state than to apply, because selling at a loss converts a paper position into a realised one, which feels like an admission rather than an adjustment.

Recent highs work as anchors too

A price the holding reached and then fell from becomes a reference point in the same way. The gap is experienced as a loss even if the position remains in profit.

Round numbers exert a similar pull, which is why market commentary attaches significance to index levels ending in zeros.

None of these reference points reflects anything about underlying value. They are memorable numbers that acquire weight through repetition.

Structure reduces the pull

Judging positions against a target allocation rather than against purchase prices changes the question from whether an investment has recovered to whether the portfolio is balanced.

Rebalancing on a schedule enforces that framing mechanically, since the rule refers to weights rather than to entry prices.

Tax consequences of realising gains or losses are a genuine consideration and differ by jurisdiction and circumstance, which is a separate matter from the psychological pull of the entry price.