What Is a Vertical Spread?
New to calls and puts? Calls and puts explained (free, Options 101).
What you'll learn in this module
- Define a vertical spread: one long and one short option, same type, same underlying, same expiration, different strikes
- Explain the difference between a debit vertical and a credit vertical
- Describe why traders use verticals: defined risk, lower cost and a capped outcome
Lesson
A vertical spread is two options traded together as one position:
- Same underlying
- Same type (both calls or both puts)
- Same expiration
- Different strikes
- One is bought (long), one is sold (short), in equal quantity
It's called "vertical" because on an option chain the strikes are listed top to bottom. You're picking two strikes in the same column.
Debit or credit? When you open a vertical, one leg costs more than the other.
- If you pay more than you receive, it's a debit spread. You pay a net debit up front.
- If you receive more than you pay, it's a credit spread. You collect a net credit up front.
That gives four basic verticals:
| Spread | Built with | Debit or credit | Generally helped by |
|---|---|---|---|
| Bull call spread | Calls | Debit | Stock rising |
| Bear put spread | Puts | Debit | Stock falling |
| Bull put spread | Puts | Credit | Stock flat or rising |
| Bear call spread | Calls | Credit | Stock flat or falling |
Why traders use them
- Defined risk. The long leg limits the loss of the short leg. You know your max loss before you enter.
- Lower cost than a single long option. Selling the second leg lowers what you pay.
- Less exposure to time decay and volatility than a single option, because the two legs partly offset each other.
The trade-off A vertical also caps the max profit. Once the stock moves past both strikes, the spread can't be worth more than its width (the distance between the strikes). A single long call has open-ended upside. A bull call spread does not.
Width Width = higher strike - lower strike. A 100/105 spread is $5 wide. At expiration, a vertical is worth somewhere between $0 and its width, per share. Times 100, that's $0 to $500 per spread for a $5-wide vertical. That single fact drives all of the math in this course.
Approval and costs Spreads typically need a specific options approval level from your broker, usually higher than the level for buying single calls and puts. Commissions and fees apply per contract, so a two-leg spread may cost more in fees than a single option. This course ignores commissions in the math, but they're real.
Worked example
Single long call vs. a bull call spread
Hypothetical: XYZ at $100. A 30-day $100 call costs $3.00. A 30-day $105 call is bid at $1.20. Compare buying the $100 call alone with buying the 100/105 bull call spread.
- Single long call cost: $3.00 x 100 = $300. Max loss = $300. Max profit is not capped. Break-even = $100 + $3.00 = $103.00.
- Bull call spread: buy the $100 call for $3.00 and sell the $105 call for $1.20. Net debit = $3.00 - $1.20 = $1.80, or $180 per spread.
- Spread max loss = net debit = $180.
- Spread width = $105 - $100 = $5. Max profit = ($5.00 - $1.80) x 100 = $320, reached if XYZ is at or above $105 at expiration.
- Spread break-even at expiration = long strike + debit = $100 + $1.80 = $101.80.
The spread costs $120 less than the single call and has a lower break-even ($101.80 vs. $103.00), but its gain is capped at $320. Neither is 'better'; they are different trade-offs. Hypothetical prices, commissions ignored.
thinkorswim desktop (Windows)
See verticals on the chain
Go to Trade > All Products and enter a symbol. Above the Option Chain, change the Spread selector from Single to Vertical. Each row now shows a two-strike vertical (for example 100/105) with a combined bid and ask for the whole spread instead of a single option. Switch back to Single to compare the individual legs. Practice this in paperMoney.
Key takeaways
- A vertical = one long + one short option, same type and expiration, different strikes.
- Pay a net debit = debit spread. Collect a net credit = credit spread.
- Verticals define risk and cap reward.
- At expiration a vertical is worth between $0 and its width (x 100).
- Spreads usually need a specific broker approval level; commissions apply per leg.
Module 1 quiz
5 questions for practice. No pass or fail. You can retake it.