Not investment advice. Educational reading. See Disclaimer.
L.1 · INTERMEDIATE · 2 MIN
Anchoring: The Number That Hijacks Your Judgment
Anchoring is the tendency to rely too heavily on the first piece of information you encounter. In investing, this means fixating on irrelevant reference points — a stock’s purchase price, its 52-week high, or an analyst’s price target — instead of evaluating current fundamentals.
Irrelevant to future returns — the stock doesn’t know what you paid
Evaluate based on current valuation vs. intrinsic value
52-week high
Past prices don’t determine future value
Compare current price to fundamental worth
Analyst price target
Often anchored to current price themselves
Build your own model with independent assumptions
IPO price
An arbitrary starting point set by bankers
Value based on current financials and growth
§ 02
Studies show that even random numbers influence financial decisions. In one experiment, spinning a roulette wheel before asking people to estimate a country’s GDP systematically biased their answers toward the random number.
§ 03
Think of a stock you own. Is your decision to hold it influenced by what you paid? Would you buy it today at the current price if you didn’t already own it? If not, you’re anchored.
§ 04
You bought a stock at $80. It’s now $60. You wouldn’t buy it at $60 today, but you’re holding ‘until it gets back to $80.’ What bias is this?
§ 05
The debiasing technique: Ask yourself ‘Would I buy this stock today at this price?’ If the answer is no, you’re holding because of anchoring, not because of value. Your purchase price is sunk — it should never influence a forward-looking decision.
Five questions · AI feedback
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Sit with the ideas.
An analyst sets a $150 target on a stock at $120; another independently values it at $95. You read the $150 target first. How does anchoring most likely distort your subsequent valuation work?
Why:
Try this in paper trading
Dollar-cost average for four weeks
Pick one ETF or stock you'd hold for 10+ years. Paper-buy the same dollar amount of it once a week for four weeks — same day each week. Journal what you noticed about the rhythm of the discipline.