"Averaging down" means buying more of a stock after it has fallen, to lower your average cost. It feels logical — the stock is "cheaper" now — which is exactly why it traps so many investors.
Why it is so tempting
Averaging down soothes two uncomfortable feelings at once: the pain of being wrong, and the hope of breaking even. If you buy more at a lower price, your average cost drops, and a smaller bounce gets you back to even. Psychologically, it feels like taking control.
Why it is dangerous
The problem is what averaging down actually does: it puts more money into your worst-performing position. A stock that keeps falling can drain a portfolio precisely because the investor keeps feeding it, turning a small mistake into a large one. You end up most heavily invested in the ideas that are working least.
It also breaks position discipline. A single conviction bet, doubled and doubled again, can quietly become an oversized share of your portfolio — the opposite of spreading risk.
What a rules-based model does instead
A rule-based model portfolio removes the temptation entirely:
- Equal position sizes mean you don't add to a name just because it fell.
- Exit by rule means a weakening position is closed on a defined signal, not nursed in hope of a rebound.
- No favourites means conviction never gets to override the process.
The result is that money rotates away from weakness rather than towards it.
The mindset shift
Disciplined investing is less about being right on every stock and more about controlling what a wrong stock can cost you. A defined exit and a fixed position size do that automatically — no willpower required in the moment.
See discipline built into a portfolio
See how a rule-based process sizes and exits positions in the methodology and the Model Portfolio. To follow the live signals, start a free 14-day trial.
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