Your First Vertical Spread
The vertical spread is the workhorse of retail options trading: defined risk, cheaper than a long option, and flexible enough to express almost any directional view. Learn it properly and most other structures become combinations of it.
Debit spreads: paying for direction
Buy one option, sell a further out-of-the-money one of the same type and expiration. You cap your upside in exchange for a materially lower cost and reduced theta bleed. Max loss is the debit paid; max profit is the strike width minus the debit.
Credit spreads: selling probability
Sell the closer strike, buy the further one for protection. You collect a credit up front and win if price stays away from your short strike. Max profit is the credit; max loss is width minus credit. The trap is the risk/reward: collecting $0.30 to risk $4.70 needs an extremely high win rate to survive.
Choosing strikes with gamma
Anchor short strikes beyond the relevant wall, not at an arbitrary delta. A put credit spread with its short strike below the Put Wall in a positive-gamma regime is structurally different from the same delta placed under the flip level in a negative-gamma regime.
- Target 0.30 delta shorts as a default, then adjust to the wall.
- Width should be small enough that one max loss stays inside your risk budget.
- Always check the breakeven against realistic daily range, not hope.
Management rules
Take credit spreads off at 50–65% of max profit rather than holding to expiration for the last few cents of gamma risk. Debit spreads: scale out at your first target and let a runner work toward the short strike.
A worked example
Stock at $100. A bullish debit call spread buys the $100 call for $3.20 and sells the $105 call for $1.40, a net debit of $1.80. Max loss is $180 per spread; max profit is $5.00 width minus $1.80 debit = $3.20, or $320 per spread — a 1.78:1 reward-to-risk ratio. The breakeven is $101.80, meaning the stock only needs a 1.8% move to reach breakeven versus the 5% move a call buyer alone might expect to justify a similar premium.
Width, delta and probability tradeoffs
Wider spreads capture more max profit but cost more and carry more max loss; narrower spreads are cheaper but cap upside quickly. As a starting template, use spread width equal to roughly half the expected move over your holding period, and choose the short strike delta based on whether you want probability (credit spread, short strike further out, lower delta) or leverage (debit spread, long strike closer to the money, higher delta).
- Narrow debit spreads (2–3% of spot) behave more like a bet on direction than magnitude.
- Wide credit spreads collect more premium but tie up more buying power per contract.
- Match width to your account size — one max loss should never threaten your daily risk limit.
Key takeaways
- Debit = pay for direction, credit = get paid for time and distance.
- Strike selection driven by gamma walls beats strike selection driven by delta alone.
- Close credit spreads early; the last 35% of profit carries most of the risk.
Practice this in the terminal
FAQ
Should a beginner start with debit or credit spreads?
Debit spreads are usually easier to reason about because max loss is simply what you paid, with no assignment risk on the short leg to worry about early. Move to credit spreads once you are comfortable managing early assignment and margin requirements.
How much of my account should one vertical spread risk?
Cap any single spread's max loss at 1-2% of account equity for swing trades. That keeps a string of losses from meaningfully damaging the account while you refine strike selection.
Test your knowledge
2 questions. Score 80% or higher to count this guide as mastered.
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Educational content only. Options involve substantial risk and are not suitable for every investor. Nothing here is financial advice.