Stock Market · Mind over Markets

Anchoring bias

Anchoring is the brain's tendency to rely heavily on the first piece of information it receives when making decisions. In investing, this 'first number' becomes a reference point that distorts every subsequent judgment.

Classic example

You buy a stock at ₹100. It rises to ₹150 and you're thrilled (anchored to ₹100 entry).

Now the stock is at ₹130. You feel like you've 'lost' ₹20 (anchored to ₹150 peak).

Both feelings reference the WRONG anchor. The only thing that matters is whether the stock is fairly valued at ₹130.

Common investing anchors

1. Purchase price: 'I won't sell below my buy price'

2. 52-week high: 'It used to be ₹200, surely it'll get back there'

3. Round numbers: 'I'll buy if it falls to ₹500' (no fundamental reason)

4. Last quote you saw: 'Nifty was at 23,000 yesterday. Today's 22,800 feels cheap'

5. Index milestones: 'Sensex at 80,000 must be due for correction'

> Anchors give your brain a shortcut. But the market doesn't care about your shortcuts.

The 52-week high trap

A stock that fell from ₹500 (52-week high) to ₹300 isn't 'cheap'. It might just be appropriately priced now, or even still overpriced. The ₹500 was just where greed peaked, not where value lives.

How professional investors fight anchoring

1. Re-evaluate every position as if buying fresh today: 'Would I buy this stock at today's price knowing what I now know?'

2. Compute current fair value via multiple methods (P/E, DCF, peer comparison)

3. Ignore historical prices when assessing forward outlook

4. Set stops based on current support levels, not your entry price

The reframe

Your purchase price is sunk cost. It has zero relevance to whether you should hold today. The only relevant question: 'Is the current price below fair value, and is the upside path clear?'

Takeaway. Anchoring locks you to irrelevant reference numbers. Your purchase price, 52-week highs, round numbers. The market doesn't care about these. Re-evaluate every position as if buying fresh today: would I buy this stock at this price now?