Anchoring Bias

Anchoring bias is a cognitive bias in which an individual relies too heavily on an initial piece of information — the "anchor" — when making subsequent judgments or decisions. In investing, anchoring is pervasive and consistently leads to poor decision-making.

How Anchoring Bias Works in Investing:

The most common anchor for investors is a stock's 52-week high or the price they paid. When a stock purchased at $100 drops to $60, investors often refuse to sell because they are "anchored" to $100 — subconsciously waiting for it to return to that price, even if the fundamentals have permanently deteriorated.

Common Anchoring Examples:

1. Purchase Price Anchor: "I can't sell at a loss" — holding a losing stock because the purchase price feels like a benchmark
2. 52-Week High Anchor: "This stock is on sale" — buying because it's 30% off its high, without evaluating whether the high was justified
3. Round Number Anchor: Placing buy/sell orders at $50, $100, $200 because round numbers feel psychologically significant
4. Analyst Target Anchor: Over-weighting a $150 analyst price target when current price is $120, even if that target was set under different market conditions
5. IPO Price Anchor: Judging performance relative to the IPO price rather than intrinsic value

Why Anchoring Is Dangerous:

• Keeps investors in losing positions too long (waiting to "break even")
• Causes missed opportunities (refusing to buy good businesses that hit new highs)
• Creates artificial support/resistance levels based on psychology, not fundamentals
• Distorts valuation analysis when anchored to previous peak multiples

How to Counter Anchoring Bias:

• Evaluate every investment based on current fundamentals and future prospects
• Ask: "Would I buy this at today's price if I didn't already own it?"
• Use DCF analysis and intrinsic value estimates rather than relative price comparison
• Regularly review positions without looking at purchase prices first