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Long/Short Concepts

Long and short are fundamental terms used to describe directional market views.

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Going Long (Long)

Definition: Buy an asset, expecting to sell later at a higher price for a profit. Characteristics:
  • Traditional investing approach
  • Theoretical profit is unlimited
  • Maximum loss is limited to the invested principal
  • Suited for uptrends
Example: Buy a stock at 100 and sell at 120, earning a profit of 20.

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Going Short (Short)

Definition: Borrow and sell an asset first, expecting to buy it back later at a lower price to return it, profiting from the difference. Characteristics:
  • Requires borrowing shares or using derivatives
  • Theoretical profit is limited (max 100%)
  • Theoretical loss is unlimited
  • Suited for downtrends
Example: Borrow a stock and sell at 100, buy back at 80 to return it, earning a profit of 20.

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Leverage

Leverage is a mechanism that uses borrowed funds to increase the size of an investment position.

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Leverage Ratio

  • Definition: The ratio of total investment amount to your own capital
  • Calculation: Leverage ratio = Total position value ÷ Own capital
  • Example: Using 10,000 to control a 100,000 position implies 10× leverage

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The Double-Edged Sword Effect of Leverage

ScenarioNo Leverage (1×)10× Leverage
Principal10,00010,000
Controlled asset10,000100,000
Price rises 10%Profit 1,000 (10%)Profit 10,000 (100%)
Price falls 10%Loss 1,000 (10%)Loss 10,000 (100%, liquidation)

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Usage Suggestions

  • Beginners should avoid high leverage
  • Strictly control position sizing
  • Set stop-loss levels
  • Maintain sufficient margin

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Margin

Margin is the capital you must post when trading with leverage.

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Types of Margin

Initial Margin
  • The minimum funds required to open a position
  • Usually 5%–20% of contract value
  • Requirements vary by instrument
Maintenance Margin
  • The minimum funds required to keep a position open
  • Usually 50%–75% of the initial margin
  • Falling below this level triggers a margin call

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Margin Calculation Example

Contract value: 100,000
Initial margin rate: 10%
Required initial margin: 10,000
Maintenance margin (75%): 7,500

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Margin Call

When account equity falls below the maintenance margin requirement:
  1. You receive a margin call notice
  2. You must add funds or reduce the position
  3. Otherwise, the position may be forcibly liquidated

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Spread

The spread is the difference between the bid price and the ask price.

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Why Spreads Matter

  • Trading cost: The spread is an implicit transaction cost
  • Liquidity indicator: Smaller spreads usually mean better liquidity
  • Market efficiency: Mature markets tend to have smaller spreads

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Typical Spread Characteristics Across Markets

MarketTypical spreadKey drivers
Major FX pairs0.1–3 pipsliquidity, trading session
Large-cap stocks0.01%–0.05%volume, volatility
Small-cap stocks0.5%–2%low liquidity
Crypto0.1%–0.5%exchange, asset

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Calculating the Spread

FX market:
  • EUR/USD quote: 1.1000/1.1002
  • Spread: 2 pips
  • Cost for 1 standard lot (100,000 units): $20
Stock market:
  • Bid: 100.00
  • Ask: 100.02
  • Spread: 0.02 (0.02%)

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Other Important Terms

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Position

  • Definition: The investment exposure you hold
  • Types: long position, short position, closed position
  • Management: Position size determines risk exposure

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Pip Value

  • Definition: The value of the smallest price movement
  • FX: typically the fourth decimal place
  • Calculation: Pip value = Contract size × Minimum price increment

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Slippage

  • Definition: The difference between the expected price and the actual execution price
  • Causes: market volatility, insufficient liquidity
  • Impact: increases trading costs

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Swap (Overnight Interest)

  • Definition: The interest differential incurred when holding a position overnight
  • Calculation: based on the interest rate difference between two currencies
  • Impact: an important cost for long-term positions

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Practical Tips

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Notes for Beginners

  1. Start small: Use small capital to get familiar with concepts
  2. Paper trading: Practice first in a demo account
  3. Learn gradually: Don’t rush to use every tool
  4. Risk first: Understanding risk matters more than chasing returns

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Common Misconceptions

  • Myth 1: Higher leverage is always better
    • Reality: Higher leverage means higher risk
  • Myth 2: Spreads don’t matter
    • Reality: For frequent trading, spread costs add up significantly
  • Myth 3: Margin is a cost
    • Reality: Margin is collateral and is returned after closing the position

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Summary

These basic terms are the universal language of trading. Understanding them deeply not only helps you read analysis reports, but more importantly enables you to:
  • Accurately assess transaction costs
  • Use leverage tools appropriately
  • Manage capital risk effectively
  • Make rational trading decisions
Remember: professional trading starts with a solid grasp of the fundamentals.