Trading vs investing
Trading and investing are often used interchangeably. They are different activities with different return sources, different cost structures and, historically, opposite expected outcomes for retail participants.
The core differences
- Return source: a trader profits from price moving between participants; an investor profits from company earnings and economic growth.
- Horizon: minutes and hours versus years and decades.
- Costs: paid on every transaction versus once, plus a small annual fee.
- Taxes: short-term rates on frequent realisation versus deferred, often lower long-term rates.
- Expected value: negative for the average retail trader after costs; historically positive for diversified long-term holders.
Zero-sum versus positive-sum
Short-term trading is close to zero-sum before costs and negative-sum after them: one participant's gain is another's loss, minus the fees both paid. Long-term equity ownership is positive-sum, because the underlying businesses produce earnings that accrue to owners regardless of who trades with whom today.
The historical comparison
A diversified global equity index has historically returned roughly 7-10% real per year to long-term holders. Set against a retail day-trading failure rate of 97-99%, that is the comparison every allocation decision reduces to.
What the long-run studies actually found
Five independent datasets, four countries and three decades point the same way: the share of retail day traders who make money after costs is small, and the share who make a living from it is smaller still. These are audited account records, not surveys or self-reported returns.
| Study or source | Sample | Headline finding |
|---|---|---|
| Barber, Lee, Liu & Odean | Taiwan, 1992-2006 | Under 1% of day traders earned reliably positive net profits; the top 500 covered their costs, everyone else funded them. |
| Chague, De-Losso & Giovannetti | Brazil, 2013-2015 (1,600 traders) | 3% were profitable and only 0.4% earned more than a bank teller. None who persisted improved with experience. |
| Barber & Odean, Trading Is Hazardous to Your Wealth | USA, 66,465 households | The most active fifth of accounts underperformed the market by about 6.5 percentage points a year. |
| ESMA and national regulators | EU/UK retail CFD accounts | 74-89% of retail CFD accounts lose money — a figure brokers are legally required to publish. |
| Jordan & Diltz | USA, 324 day traders | About 20% finished profitable over the period; losses were concentrated among the least experienced. |
Where the money actually goes
Before a trader beats the market, they must beat their own cost base. Every round trip pays a spread, usually a commission, and some slippage. At a realistic $8 per round trip, cost drag alone can exceed the entire account within a year.
| Trader profile | Round trips per year | Annual cost | Share of a $25,000 account |
|---|---|---|---|
| Casual — 5 trades a week | 260 | $2,080 | 8% |
| Active — 5 trades a day | 1,250 | $10,000 | 40% |
| Very active — 20 trades a day | 5,000 | $40,000 | 160% |
| Scalper — 50 trades a day | 12,500 | $100,000 | 400% |
Key terms, defined
- Day trading
- Opening and closing a position in the same instrument within one trading session, aiming to profit from short-term price movement.
- Spread
- The gap between the buy and sell price. It is an immediate, guaranteed loss at the moment a position opens.
- Leverage
- Borrowed exposure that multiplies both gains and losses. It shortens the time to ruin far more than it raises expected return.
- Slippage
- The difference between the expected fill price and the actual one, largest exactly when volatility makes trading look most attractive.
- Drawdown
- The fall from an account's peak to its trough. A 50% drawdown requires a 100% gain to recover.
- Expected value
- The average outcome of a strategy repeated many times. For retail day trading, it is negative after costs.
Frequently asked questions
Can you do both?
Yes, and many people do — but the evidence suggests treating trading as entertainment spending rather than as a return strategy, and keeping it separate from long-term capital.
Is buy-and-hold guaranteed to work?
No. It is exposed to prolonged drawdowns and requires a long horizon. Its advantage is a positive expected return and a far lower cost and tax burden, not certainty.
Is swing trading closer to investing?
Only in frequency. The return source is still price movement rather than business earnings, so the structural disadvantages remain — just smaller.
Can day trading be learned with enough practice?
The Brazilian futures study followed traders day by day and found no improvement with experience: persistence increased losses rather than skill. Unlike chess or surgery, markets give noisy, delayed feedback, so practice does not reliably build expertise.
Do courses, signals or prop-firm challenges improve the odds?
There is no published evidence that paid education changes outcomes. Course fees, subscription costs and challenge fees are additional guaranteed costs added on top of an already negative expected value.
What is a realistic annual return for a retail day trader?
For the large majority it is negative after costs and taxes. A diversified index fund returned roughly 7-10% a year on average over long periods, with no screen time and far lower cost.
Read the whole argument
The alternative to trading is set out in practical detail in the closing chapters of Day Trading Kills.