Stock Basics Ch4. What Is Short-Term Trading — The Lure of Quick Profits and the Cold Reality
Chapter 4. What Is Short-Term Trading — The Lure of Quick Profits and the Cold Reality
“Buy today, sell today, pocket the gains.” That simplicity is the appeal of short-term trading. But the statistics are unforgiving.
1. What Is Short-Term Trading?
Short-term trading means buying and selling within a short timeframe to capture price differences. It is the opposite of long-term investing (holding for years).
2. Short-Term Trading vs Long-Term Investing
| 구분 | Short-Term Trading | Long-Term Investing (Buy & Hold) |
|---|---|---|
| Holding period | Minutes to days | Months to years |
| Source of profit | Short-term price fluctuations | Company growth + dividends |
| Skills required | Chart reading, fast decisions, emotional control | Business analysis, patience |
| Taxes & fees | Costs accumulate with frequent trades | Minimal (negligible when held long-term) |
| Risk level | High (leverage and emotions play a large role) | Relatively low (time dilutes risk) |
3. The Real Costs of Short-Term Trading — Fees + Taxes
One major reason short-term trading is difficult is that costs are higher than most people expect.
| Item | Description | Rate (example) |
|---|---|---|
| Trading commission | Paid to the broker on every buy and sell | ~0.015–0.025% |
| Securities transaction tax | Charged only on sells (KOSPI basis) | 0.18% (as of 2024) |
| Capital gains tax | Applies to major shareholders or overseas stocks | 22% |
Example calculation: Buy and then sell ₩10,000,000 worth of stock?
- Round-trip commission: ~₩4,000
- Securities transaction tax: ₩18,000
- Total cost: approximately ₩22,000 — you need to earn just 0.22% to break even.
Repeat 3–5 trades a day and these costs pile up fast. To profit from short-term trading, you must consistently generate returns that beat the fees — every single trade.
4. The Psychological Traps of Short-Term Trading
The pain of a loss feels more than twice as intense as the pleasure of an equivalent gain. This is the root reason short-term traders fail to cut losses — and let them grow.
"Trying to avoid a 5% loss, you end up with a 50% loss."
Common traps short-term traders fall into:
- Refusing to cut losses — “It’ll bounce back soon,” so you keep holding — and the loss keeps growing
- Taking profits too early — Selling the moment you’re in the green, only to miss a much larger move
- FOMO (Fear Of Missing Out) — Chasing a stock that’s already rallied and buying near the top
- Revenge trading — After a loss, immediately placing a larger trade trying to win it back
5. Conditions Where Short-Term Trading Can Work
Short-term trading is not impossible. It becomes more viable when these conditions are met:
- Sufficient liquidity: High trading volume so orders fill at the intended price
- Clear entry and exit rules: Based on objective criteria (moving averages, support/resistance), not gut feelings
- Strict stop-loss discipline: Mechanically sell if the loss exceeds 2–3%
- Dedicated focus time: You can monitor the market from 9:00 AM to 3:30 PM
🧠 Knowledge Check
[Key Check Question]
Q. You buy ₩10,000,000 worth of stock and immediately sell it. What is the minimum cost?
① Almost nothing ② About ₩2,000 ③ About ₩22,000 or more
Answer: ③ — Round-trip commission (~₩4,000) + securities transaction tax on the sell (₩18,000) adds up to ₩22,000 or more. Short-term trading requires you to repeatedly generate returns that exceed this cost.
Next: we examine the concept of margin buying (미수거래) — borrowing to buy stocks — and the danger of forced liquidation.
Oiyo
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