With the Nifty down about 14% in 2026 and plenty of individual stocks down far more, almost every investor is staring at a red position and asking the same question: "It's down 20% — should I average down and lower my cost, or cut and move on?" It's the right question. But there's a bigger one hiding underneath it. This is for learning only.
First, the drawdown maths nobody likes
Losses and gains are not symmetric. The deeper the hole, the exponentially harder it is to climb out:
| If you're down… | You need this gain just to break even |
|---|---|
| 20% | +25% |
| 33% | +50% |
| 50% | +100% |
| 75% | +300% |
A 50% fall needs a double just to get back to even. That's why avoiding the catastrophic loss matters more than chasing the next winner.
Averaging down: tempting, often a trap
Adding to a losing position feels smart — a lower average price! — but it's also how a small mistake becomes a large one. If the thesis was wrong, averaging down just puts more money into the wrong idea. Without a rule, "averaging down" and "refusing to admit a mistake" look identical.
The real question: how big should it have been?
Here's the question that actually matters, and it's one you answer before you buy, not after. How much of your portfolio was in that stock?
- If the stock was about 3% of your portfolio (a capped, equal-weight approach), a 50% fall costs your whole portfolio just 1.5% — painful but survivable.
- If it was 20% of your portfolio, that same 50% fall costs you 10% of everything.
Same stock, same fall — wildly different damage. Position size, decided in advance, is what turns a blow-up into a bruise.
What disciplined investors do
Decide the exit (a stop-loss) and the size before entering. Size each position so no single name can sink the portfolio. And when a stop is hit, honour it — a defined small loss beats an open-ended one.
Work out a sensible size for any trade — by equal weight or by your stop-loss risk — in the position-size calculator. The deeper logic is in what position sizing is and the drawdown maths. In a down market, survival is the strategy.
Why a 50% loss needs a 100% gain: the drawdown maths that humbles everyone
Losses and gains aren't symmetric. A 50% fall needs a 100% rise just to break even — the brutal arithmetic of drawdowns, and why avoiding big losses matters most.
Stop-loss: the simple rule that keeps small losses small
The difference between investors who survive and those who blow up is often one habit — the stop-loss. Why big losses are so hard to recover.
Should you average down a losing stock? Why a rules-based model won't
Averaging down feels smart and often isn't. Here's why adding to a losing position is so tempting, the risk it creates, and how a rules-based process avoids it.
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