What is a call backspread?

A call backspread sells one call at a lower strike and buys two calls at a higher strike in the same expiration. It is usually opened for a small credit and profits from a large rally, with unlimited upside. The maximum loss occurs if the stock expires exactly at the higher strike.

How do you calculate max loss on a call ratio backspread?

Maximum loss equals the difference between the strikes minus the net credit received, or plus the net debit paid, multiplied by 100. With a short $100 call, two long $110 calls, and a $0.80 credit, the maximum loss is $9.20 per share or $920. It happens at expiration with the stock exactly at $110.

Where is the breakeven on a 1 by 2 call backspread?

For a credit backspread there are two. The lower breakeven is the short strike plus the credit, $100.80 in the example. The upper breakeven is the long strike plus the spread width minus the credit, $110 plus $10 minus $0.80, or $119.20. Above that the trade profits without limit.

Call backspread vs long call: which is better for a bullish bet?

A long call costs a debit and profits above the strike plus the premium, with the loss limited to the debit. A call backspread can be opened for a credit and keeps it if the stock falls, but needs a bigger rally to profit and has a loss valley between the strikes. It suits traders who want to be paid to wait for a big move and can tolerate losing on a modest one.

Is a call backspread a defined risk trade?

Yes. The worst case is the spread width minus the credit, reached at the long strike, and the loss shrinks on either side of that point. There is no unlimited risk because the number of long calls exceeds the number of short calls.

Why does a call backspread lose money on a small rally?

Between the strikes the short call is in the money while the two long calls are still out of the money, so the position is short intrinsic value. The long calls only begin to offset it above the higher strike, and must recover the full spread width before the trade returns to breakeven.

Backratio Call Spread Calculator & strategy guide

Butterflies & RatiosAdvancedBullishDefined risk

Sell one call and buy multiple higher-strike calls to create convex bullish upside.

Payoff at expiration

Worked example: XYZ at $100, 60 days to expiration

Profit Loss Breakeven

Max profit: Unlimited; Unlimited upside
Max loss: −$920; Occurs near the long call strike, reduced by net credit if opened for credit
Breakevens: $100.80 & $119.20; Depends on strikes and net premium

The trade · net credit $0.80 a share ($80)

Sell $100 call · $3.40
Buy 2 $110 calls · $1.30

Price this backratio call spread on SPY with today's chain — then change the ticker, strikes and expiry.

Open in Build

What is a backratio call spread?

A backratio call spread, also called a call backspread or call ratio backspread, sells one call at a lower strike and buys two calls at a higher strike in the same expiration. It is the reverse of a ratio call spread. The premium from the short call pays for most or all of the two long calls, so the trade is usually opened for a small credit or close to even money.

The position is bullish, but in an unusual way. Because there are more long calls than short calls, the net exposure above the higher strike is long one call, and the profit grows without limit as the stock rallies. Below the lower strike, all options expire worthless and the result is simply the credit received or the debit paid. The danger zone is in between: at the higher strike the short call is fully in the money while both long calls are worthless, which is where the maximum loss occurs.

The payoff diagram is a shallow valley. It is flat on the downside at a small profit or loss, dips to its lowest point at the long strike, then climbs steeply with an upward slope equal to one long call. Traders use it when they expect a large move higher, often around a catalyst, and want a convex position that does not lose much if the stock instead drifts or falls.

Setup

Leg	Strike	Expiry
Sell 1 call	At the money	Near
Buy 2 call	2 strikes OTM	Near

Backratio Call Spread example

XYZ trades at $100 with 60 days to expiration. You sell one $100 call for $3.40 and buy two $110 calls for $1.30 each ($2.60 total). The trade opens for a net credit of $0.80 per share, or $80 for the 1 by 2 position. The spread between strikes is $10.

Stock at expiration	Result
$100 or below	All three calls expire worthless. You keep the $80 credit.
$110	The short $100 call is worth $10.00, costing $1,000, and both $110 calls expire worthless. P&L is −$1,000 plus the $80 credit, or −$920, the maximum loss.
$119.20	Upper breakeven. The short $100 call costs $19.20 ($1,920) and the two long $110 calls are worth $9.20 each ($1,840). Intrinsic value nets to −$80, offset by the $80 credit.
$130	The short $100 call costs $30.00 ($3,000) and the two long $110 calls are worth $20.00 each ($4,000). Net intrinsic is $1,000, plus the $80 credit gives $1,080. Every further dollar of rally adds $100.

Maximum loss is $920 if XYZ closes exactly at $110. The trade keeps the $80 credit if the stock closes at or below $100, crosses into a loss above the $100.80 lower breakeven, and returns to profit above $119.20 with unlimited upside beyond that.

When to use a backratio call spread

You expect a large upside move, such as a positive earnings surprise, a product approval, or a breakout from a long consolidation, and want leveraged exposure to it.
Implied volatility is relatively low, so the two out-of-the-money calls you buy are cheap and a volatility expansion during a rally adds to gains.
You want a bullish trade that does not lose much, or even makes a little, if you are wrong and the stock falls.
Call skew is flat or inverted so that the higher strike calls are not overpriced relative to the at-the-money call you sell.
Typical entries use 45 to 90 days to expiration, giving the stock time to move and reducing the rate of time decay on the two long calls.

Risks to understand

The worst outcome is a moderate rally that stalls at the long strike. In the example a close at $110 loses $920, even though the direction was right.
Time decay works against the position when the stock sits between the strikes, because the two long calls lose value faster than the single short call as expiration approaches.
A drop in implied volatility after entry hurts, since the position is net long options. The classic case is a rally into an event that resolves with a volatility crush.
The short call can be assigned early once it is in the money, especially before an ex-dividend date, leaving you short stock against two long calls.
Even when the stock does move sharply, the position needs it to exceed the upper breakeven. A rally to $115 in the example still loses $420 at expiration.

Managing the trade

Take profits when the stock makes the anticipated move. The position gains most from a fast rally while the long calls still hold time value, and waiting for expiration exposes you to the valley.
If the stock drifts up toward the long strike with little time remaining, closing the trade before the last two weeks avoids the sharpest part of the maximum loss zone.
The short call can be rolled up to a higher strike to reduce the size of the valley, at the cost of giving back some of the credit.
If the stock falls and the position is worth almost nothing, closing frees margin and removes the small chance that a late rally lands the stock exactly at the long strike.
Set a time-based exit. Backspreads are trades on a move happening within a window, and if the move has not happened by a set date the thesis is usually wrong.

Backratio Call Spread FAQs

What is a call backspread?: A call backspread sells one call at a lower strike and buys two calls at a higher strike in the same expiration. It is usually opened for a small credit and profits from a large rally, with unlimited upside. The maximum loss occurs if the stock expires exactly at the higher strike.
How do you calculate max loss on a call ratio backspread?: Maximum loss equals the difference between the strikes minus the net credit received, or plus the net debit paid, multiplied by 100. With a short $100 call, two long $110 calls, and a $0.80 credit, the maximum loss is $9.20 per share or $920. It happens at expiration with the stock exactly at $110.
Where is the breakeven on a 1 by 2 call backspread?: For a credit backspread there are two. The lower breakeven is the short strike plus the credit, $100.80 in the example. The upper breakeven is the long strike plus the spread width minus the credit, $110 plus $10 minus $0.80, or $119.20. Above that the trade profits without limit.
Call backspread vs long call: which is better for a bullish bet?: A long call costs a debit and profits above the strike plus the premium, with the loss limited to the debit. A call backspread can be opened for a credit and keeps it if the stock falls, but needs a bigger rally to profit and has a loss valley between the strikes. It suits traders who want to be paid to wait for a big move and can tolerate losing on a modest one.
Is a call backspread a defined risk trade?: Yes. The worst case is the spread width minus the credit, reached at the long strike, and the loss shrinks on either side of that point. There is no unlimited risk because the number of long calls exceeds the number of short calls.
Why does a call backspread lose money on a small rally?: Between the strikes the short call is in the money while the two long calls are still out of the money, so the position is short intrinsic value. The long calls only begin to offset it above the higher strike, and must recover the full spread width before the trade returns to breakeven.