A vertical options spread combines a purchased option with a sold option at a different strike price, using the same underlying asset and expiration date. Both options are calls or both are puts, with equal contract quantities.
The structure creates a directional trade with capped profit and a defined theoretical maximum loss. A trader can use it to express a bullish or bearish view without taking the same exposure as an outright option purchase or an uncovered option sale. The tradeoff is straightforward: reducing one part of the risk means giving up some potential reward.
How Vertical Options Spreads Work
Each vertical spread has two legs. The long leg is the option you buy; the short leg is the option you sell. Their different strike prices create a range over which the position’s expiration value changes.
For an option buyer, selling another option offsets part of the purchase cost. For an option seller, buying another option provides protection against an adverse move. In both cases, the resulting position has a profit ceiling. These are the central vertical spread tradeoffs covered by the Options Industry Council.
The difference between the strikes is the spread width. A spread using $100 and $105 strikes has a width of $5. This is not the same as the bid–ask spread, which measures the gap between buying and selling quotations.
Matching expiration dates matters. Using different expirations changes the position into a calendar or diagonal spread, with different pricing behavior and risks. Matching contract multipliers and deliverables matters too, particularly with adjusted options.
The Four Types of Vertical Spread
Calls are not automatically bullish, and puts are not automatically bearish. Direction depends on which strike you buy and which you sell.
| Strategy | Outlook | Structure | Opening cash flow |
|---|---|---|---|
| Bull call spread | Bullish | Buy lower strike call; sell higher strike call | Net debit |
| Bear put spread | Bearish | Buy higher strike put; sell lower strike put | Net debit |
| Bull put spread | Bullish or neutral | Sell higher strike put; buy lower strike put | Net credit |
| Bear call spread | Bearish or neutral | Sell lower strike call; buy higher strike call | Net credit |
Bull Call Spread
A bull call spread buys a call at a lower strike and sells a call at a higher strike. The purchased call costs more than the sold call brings in, so opening the position requires a net payment.
This structure fits a bullish forecast with a price target. Selling the higher strike reduces the entry cost, but gains stop increasing once the underlying reaches that strike at expiration. A larger rally does not produce a larger expiration payoff. The bull call spread guide covers its structure, payoff and risks in more detail.
Bear Put Spread
A bear put spread buys a higher strike put and sells a lower strike put. It also requires a net debit, but its value increases as the underlying falls through the strike range.
The sold put reduces the cost of the bearish position. In exchange, the trader gives up further gains below the lower strike at expiration. It suits a forecast of a decline to a chosen level rather than a trade intended to capture every dollar of a collapse. See the bear put spread guide for the full payoff mechanics.
Bull Put Spread
A bull put spread sells a higher strike put and buys a lower strike put. The trader receives a net credit because the sold put carries the higher premium.
The position earns its maximum theoretical profit when the underlying finishes at or above the higher strike. It can therefore profit from a rally, sideways movement or even a modest decline, depending on where the strikes sit relative to the starting price. The bull put spread guide examines the protection provided by the purchased put and the obligations attached to the short put.
Bear Call Spread
A bear call spread sells a lower strike call and buys a higher strike call. It produces an opening credit and reaches its maximum theoretical profit when the underlying finishes at or below the lower strike.
This structure can express a bearish view without requiring a large decline. The purchased higher strike call protects against a rise through the strike range, but the spread can still lose substantially more than its opening credit. The bear call spread guide covers that balance between premium received and capital at risk.
Calculating Maximum Profit, Loss and Break-Even
Calculate the position in premium points before converting it into money. The examples below assume standard equity options with a multiplier of 100, so a $1 premium represents $100 per contract. Check the actual contract terms rather than applying that multiplier to every product; FINRA’s options overview covers standard contract sizing and trading requirements.
For the following formulas, W means spread width, D means the net debit paid and C means the net credit received. All three use the same premium units.
Debit Spread Formulas
Maximum loss = D × multiplier × number of spreads.
Maximum profit = (W − D) × multiplier × number of spreads.
For a bull call spread, the expiration break-even price is the long call strike plus the debit. For a bear put spread, it is the long put strike minus the debit.
Credit Spread Formulas
Maximum profit = C × multiplier × number of spreads.
Maximum loss = (W − C) × multiplier × number of spreads.
The opening credit is the profit ceiling, not a measure of how little the position can lose. This relationship between credit, width and exposure is set out in OIC’s guidance on vertical credit spread mechanics.
For a bull put spread, the expiration break-even price is the short put strike minus the credit. For a bear call spread, it is the short call strike plus the credit.
These calculations exclude commissions, other charges and any costs arising from assignment or subsequent stock positions. They describe the intended spread payoff, assuming the legs and resulting obligations are handled together.
A Worked Vertical Spread Example
Suppose a hypothetical stock trades at $100. A trader buys one $100 call for $4.20 and sells one $105 call with the same expiration for $2.00.
The net debit is $2.20, or $220 with a 100 multiplier. The width is $5. Maximum theoretical loss is $220, maximum theoretical profit is $280, and expiration break-even is $102.20.
If the stock finishes at $99, both calls have no intrinsic value and the position loses its $220 debit. At $103, the purchased call has $3 of intrinsic value and the sold call has none. The spread’s $300 expiration value, less its $220 cost, produces an $80 profit.
At $108, the calls have intrinsic values of $8 and $3. Their difference remains $5, producing the maximum $280 profit after subtracting the debit. The stock’s move above $105 adds nothing to the spread’s expiration payoff.
Now consider a separate hypothetical bull put spread: sell the $100 put and buy the $95 put for a $1.40 credit. The maximum theoretical profit is $140 and the maximum loss is $360. Break-even is $98.60. Receiving cash at entry does not make this the smaller risk.
Neither example is a live quotation or a recommendation. The premiums are illustrative, and both calculations exclude trading costs.
Choosing Strikes, Width and Expiration
Start with a forecast that includes both a price and a deadline. “Bullish” leaves too much unanswered. A view that a stock could rise from $100 to $105 over six weeks gives you something useful to compare against available strikes and expirations.
Then examine the actual debit or credit. A cheap debit spread may require a larger move before it becomes profitable. A small credit may compensate you poorly for the loss you must accept if the trade goes wrong.
Width changes the payoff range, but it does not tell you the complete risk. A $10 wide credit spread receiving $2 has an $8 maximum loss per unit. A $5 wide spread receiving $1 has a $4 maximum loss. Contract quantity can reverse the comparison: three of the narrower spreads risk more dollars than one of the wider spreads.
Expiration should fit the forecast rather than simply offer an attractive premium. An option expiring before the expected move cannot capture that move. A later expiration gives the forecast more time to work, but its price may make the proposed trade unattractive.
Compare candidates using the dollars at risk, the move required, the profit available and the likely exit conditions. Do not choose a spread because its displayed percentage return looks impressive.
Why Results Before Expiration Differ
An expiration payoff is not a forecast of what the spread will trade for next week. Before expiration, both options can retain time value, and their prices respond to changes in the underlying, remaining time and implied volatility.
The legs offset some exposures, but they do not cancel every sensitivity. Avoid assuming that all debit spreads always suffer from time decay or that every credit spread always benefits. The position’s behavior depends on where the underlying sits relative to both strikes. The guide to delta, gamma, theta and vega in options spreads examines those changing exposures.
In the call example, the stock could reach $105 before expiration without the spread being worth the full $5. The short call may still carry enough time value to keep the position below its maximum expiration value.
Entering and Closing the Position
A combined spread order lets you specify the intended net debit or credit rather than relying on two separate transactions. Exchanges process complex orders using this combined pricing approach; Cboe’s complex order net pricing documentation describes how the leg prices combine.
Use the net price to judge the trade. Paying $2.35 instead of $2.20 for the hypothetical call spread raises the maximum loss by $15 and reduces the maximum profit by $15 per spread. Small differences become material across larger quantities.
A limit price controls the worst acceptable execution price, but it does not guarantee a fill. A displayed midpoint is a reference, not a promise.
To close an intact vertical, sell the option you own and buy back the option you sold. Closing only the protective long option can leave an uncovered short position. Decide whether you intend to exit the complete spread before making changes to individual legs.
Assignment and Expiration Risks
Defined risk does not mean the position can be ignored. American style options can be exercised before expiration. If the short leg is assigned, the resulting obligation exists even though you own another option that was intended to protect the trade.
The protective option does not automatically resolve every assignment. You may need to manage shares, exercise rights or the remaining option, with cash and margin consequences. FINRA’s guidance on assignment in multileg options positions addresses this separation between the short leg’s obligation and the long leg’s protection.
Expiration creates another problem when the underlying finishes near a strike. One leg may be exercised or assigned while the other is not, leaving a stock position rather than the intended spread. That stock exposure can continue after the options expire and produce losses outside the simple payoff calculation.
Before opening a vertical, establish how you will close it, what happens if it is assigned and whether the account can meet any delivery obligation. Check the product’s exercise style, settlement method and your firm’s instruction deadlines. A payoff diagram is useful; it is not an account management plan.