The 60% Win Rate Trap: It's Not About How Many Losses in a Row
Investing Mindset, Part 2 | A strategy that's right most of the time and an account that survives are not the same thing.
Six out of ten trades were winners. The account is still basically flat. That's not a paradox. If each of those six wins made 5% and each of the four losses cost 7%, reinvesting everything each time leaves you with roughly 0.25% before costs. The number of correct calls matters less than the size of the wins and losses attached to them.
The three numbers hiding behind a win rate
Expected profit per trade is calculated as "win rate x average gain minus loss rate x average loss minus cost per trade." But that formula alone doesn't explain compounding. As losses grow, there's less capital left to generate the next gain. Recovering from a 50% loss requires a 100% gain on what remains.
Same win rate, different outcome
- Six trades x 5% gain each
- Four trades x 7% loss each
- Final return: about 0.25%
Hypothetical calculation. 1.05^6 x 0.93^4 minus 1 = 0.2461%. Assumes full reinvestment each time, no deposits or withdrawals, and no costs.
The order in which the gains and losses arrive doesn't change the final multiplied result here. If you invest the same percentage each time and there's no cash flowing in or out, reordering the sequence produces the same ending balance. What does change is the size of the interim drawdown and the psychological toll of watching it happen. The idea that a losing streak by itself breaks compounding isn't quite accurate.
When the odds sound scary, run the numbers again
Assume a 60% win rate holds steady and each trade is independent. Across 320 trades, the expected number of losses is 128. But the count of losses and the probability of a losing streak are two different things. The probability of hitting at least one losing streak of a given length, calculated state by state, looks like this:
| Length of losing streak | Probability across 320 trades |
|---|---|
| 5 or more in a row | 86.66% |
| 7 or more in a row | 26.77% |
| 10 or more in a row | 1.94% |
Calculated by the editorial team. This is an exact recursive calculation for an independent Bernoulli model with a 40% loss probability per trade, rounded. In real markets, the same shock often hits multiple positions at once, and a strategy's win rate can shift. This table is not a forecast or a ceiling for real-world risk.
Per-trade stop-loss versus account-level loss
If you lose 3% of your entire account on every trade, ten losses in a row bring the account down about 26.26%. But if only 10% of the account is in a position that drops 3%, and the rest is untouched with no added costs, the account-level loss is about 0.3%. A trade involving four simultaneous holdings shouldn't be modeled as 320 sequential, fully-invested trades either.
Stop orders can help, but they don't guarantee the price at which a trade fills. FINRA notes that in fast-moving markets, the price you set and the price at which the sale actually executes can diverge sharply. A stop-limit order caps the price but carries the risk of not executing at all. [[Source]](https://www.finra.org/investors/insights/stop-orders-factors-consider-during-volatile-markets)
