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Start Learning → Browse All Articles →Vertical spreads combine two options of the same type and the same expiry, but at different strike prices — one bought, one sold — to turn what would otherwise be an open-ended position into one with a clearly defined maximum gain and maximum loss from the moment it is opened. The trade-off for that defined outcome is giving up some of the unlimited potential a single option position could offer, in exchange for a lower cost and a known worst case. This piece works through how the two legs of a vertical spread work together, the different variants built from calls and puts, what determines the cost of entering one, and how to think about choosing strikes for a given view.
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A vertical spread is built from two options of the same type — either two calls or two puts — sharing the same expiry date but set at different strike prices. One leg is bought and the other is sold, and the combination of the two, rather than either leg in isolation, is what defines the position’s actual risk and reward profile.
The premium paid for the bought leg and the premium received for the sold leg largely offset each other, since both options share the same underlying and expiry and differ only in strike. This offsetting is what makes a vertical spread meaningfully cheaper to enter than an outright single-option position, at the cost of capping how much the position can ultimately gain.
The name reflects how the two strikes sit relative to each other on an options chain, which lists strikes in a vertical column for a given expiry. A spread built from two different strikes within the same expiry column is, quite literally, a vertical spread — distinguishing it from other spread types that combine different expiries instead.
A vertical spread built from calls, where the lower strike is bought and the higher strike is sold, is a bull call spread, established when the view is that the underlying will rise, at least up to the higher strike. A vertical spread built from puts, where the higher strike is bought and the lower strike is sold, is a bear put spread, established when the view is that the underlying will fall, at least down to the lower strike.
The other two variants reverse which leg is bought and which is sold. A bear call spread, selling the lower strike call and buying the higher strike call, is established when the view is that the underlying will stay below the lower strike, generating income from the net premium received. A bull put spread, selling the higher strike put and buying the lower strike put, is established when the view is that the underlying will stay above the higher strike, similarly generating income from the net premium received.
The bull call spread and bear put spread both require a net payment to enter, since the bought leg costs more than the premium received from the sold leg — these are called debit spreads. The bear call spread and bull put spread both generate net income when entered, since the sold leg’s premium exceeds the bought leg’s cost — these are called credit spreads. This distinction affects both the upfront cash flow and how the maximum gain and loss are calculated for each variant.
For a debit spread, the maximum loss is limited to the net premium paid to enter the position, and this occurs if the underlying finishes at or beyond the point where both options either expire worthless or offset each other entirely. The maximum gain is the difference between the two strikes, minus the net premium paid, occurring if the underlying moves favourably enough that the bought leg reaches its full value relative to the sold leg.
For a credit spread, the maximum gain is limited to the net premium received when the position was opened, occurring if the underlying finishes in the range where both options expire worthless. The maximum loss is the difference between the two strikes, minus the net premium received, occurring if the underlying moves far enough against the position that both options finish in the money to their full extent.
The sold leg in any vertical spread is what caps the position’s maximum gain, since any further favourable movement in the underlying beyond that leg’s strike is offset by the growing obligation on the option that was sold. This is the direct cost of collecting or reducing premium through the sold leg — capped upside in exchange for a lower net cost or an upfront credit.
The bought leg, in turn, is what caps the position’s maximum loss, since it provides an offsetting gain that limits how much the sold leg’s losses can grow if the underlying moves unfavourably beyond both strikes. This combination — one leg capping the upside, the other capping the downside — is what gives every vertical spread its defined-risk, defined-reward character regardless of which of the four variants is being used.
Strikes placed closer together produce a narrower maximum gain or loss range and generally cost less to establish, or generate less credit, than strikes placed further apart on the same underlying and expiry. A trader with a more precise, narrower expectation of where the underlying will move tends to favour strikes closer together, while a trader wanting a wider range of favourable outcomes tends to favour strikes further apart.
For a credit spread specifically, choosing strikes further from the current price generally increases the probability of the position reaching its maximum gain, since the underlying needs to move further to threaten the position, but this comes with a smaller net credit received relative to the maximum possible loss. Choosing strikes closer to the current price increases the credit received but reduces the probability of reaching the maximum gain, since less movement is needed to put the position at risk. Balancing this trade-off deliberately, rather than defaulting to whichever strikes happen to be most commonly used, is part of structuring a spread that actually matches a given view.
This same trade-off applies in reverse for a debit spread, though the framing shifts slightly. Choosing a bought strike close to the current price and a sold strike further away generally costs more upfront but leaves a wider range for the underlying to move favourably before the sold leg begins capping further gains. Choosing both strikes closer to the current price reduces the cost but also narrows the range over which the spread can capture additional value, since the cap takes effect sooner. Neither approach is objectively better — the right balance depends entirely on how confident the underlying view is and how much of a move is genuinely expected.
A single bought option’s value is meaningfully affected by changes in expected volatility, since higher expected volatility generally increases an option’s premium and lower expected volatility generally decreases it, independent of any actual move in the underlying. A vertical spread, by holding one bought and one sold option on the same underlying, largely offsets this sensitivity, since both legs move in the same direction when volatility changes.
This reduced sensitivity to volatility is one of the practical advantages of a vertical spread over a single-option position when a trader’s view is specifically about direction rather than about volatility itself. It allows the position to reflect a directional view more cleanly, without the outcome being meaningfully clouded by unrelated shifts in how volatile the market expects the underlying to be over the life of the position.
This is a meaningful distinction from simply buying a single call or put to express a directional view, where a shift in expected volatility working against the position can erode value even if the underlying itself moves in the anticipated direction. A trader who has been surprised by a single-option position losing value despite a broadly correct directional call has often run into exactly this effect, and a vertical spread is one of the more straightforward ways to reduce that particular source of frustration without abandoning options altogether.
As expiry nears, a vertical spread’s value moves increasingly toward one of its two defined extremes — the maximum gain or the maximum loss — depending on where the underlying is trading relative to the two strikes. This narrowing of outcomes as expiry approaches is a natural consequence of both options’ time value decaying toward zero.
Many traders choose to close a vertical spread before expiry once it has captured a reasonable portion of its maximum potential gain, rather than holding for the full amount and risking a late reversal that gives back some of that gain. This is a matter of individual risk tolerance rather than a strict rule, since holding to expiry is also a perfectly valid choice for a spread that is clearly trending toward its maximum favourable outcome.
Liquidity in both legs is worth checking before deciding whether to close a spread early, since closing it requires transacting in both options simultaneously, and a spread built from two thinly traded strikes can be harder to close efficiently than one built from more actively traded strikes. This is a practical execution consideration that sits alongside the purely strategic decision of whether closing early or holding to expiry better suits a given position, and overlooking it can turn an otherwise sound decision into a poorly executed one.
A vertical spread uses two strikes within the same expiry, listed in the same vertical column of an options chain. Spreads that instead combine the same strike across different expiries, or combine different strikes and different expiries together, are considered separate spread types.
A debit spread costs less than the bought leg alone would cost on its own, since the sold leg’s premium offsets part of that cost. A credit spread generates income upfront rather than costing anything to establish, though it carries its own defined maximum loss if the underlying moves unfavourably.
For a debit spread, no — the maximum loss is capped at the net premium paid. For a credit spread, the maximum loss is the difference between the two strikes minus the credit received, which can exceed the credit itself, so it is important to understand this figure before entering a credit spread.
A credit spread is generally chosen when the view is that the underlying will stay within or beyond a certain range rather than move sharply in a specific direction, generating income from time decay on the sold leg. A debit spread is generally chosen when the view is a more direct directional move is expected.
Because a vertical spread holds one bought and one sold option on the same underlying, changes in expected volatility affect both legs similarly, largely offsetting each other. This makes a vertical spread’s value considerably less sensitive to volatility changes than a single, unhedged option position would be.
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