Call Ratio Backspread at a glance
| Construction | Sell 1 call at the money and buy 2 calls 2 strikes above the money, all in the front month. |
|---|---|
| Outlook | Bullish |
| Volatility view | Wants rising IV |
| Max profit | Unlimited. |
| Max loss | Long strike minus short strike, minus the net credit or plus the net debit, times 100. |
| Breakeven | Upper breakeven equals the long strike plus the strike width, minus the net credit or plus the net debit. |
| Experience level | Advanced |
| Also called | Call backspread, Reverse call ratio spread |
How a call ratio backspread works
A call ratio backspread flips the call ratio spread around. You sell one at the money call and use the premium to buy two cheaper out of the money calls. Depending on strike spacing and volatility, the trade may cost a small debit or bring in a small credit. One long call covers the short call, forming a bear call spread, and the second long call stands alone, which is what gives the position unlimited upside.
At expiration the payoff has a valley at the higher strike. Below the short strike, all calls expire worthless and you keep the credit or lose the debit. Between the strikes, the short call loses value as the stock rises while the long calls are still worthless, so the loss peaks at the long strike. Above it, the two long calls gain twice as fast as the short call loses, so the line climbs through the upper breakeven and keeps rising with the stock.
Before expiration the backspread is net long premium. Time decay works against you, especially when the stock sits near the long strike in the final weeks. Rising implied volatility helps because you own two options for every one you sell. The ideal path is a sharp, early rally: the long calls gain delta quickly, and the position can show a profit well before expiration even if the stock has not yet passed the expiration breakeven.
Call Ratio Backspread example with real numbers
With the stock at $100, implied volatility at 30%, a 4.1% risk free rate and no dividend, you would sell 1 100 call (32 days) at $3.73, buy 2 105 calls (32 days) at $1.78. That is a net credit of $17. At expiration a maximum profit of unlimited and a maximum loss of $483, with breakevens at $100.17 and $109.83. The lognormal chance of profit is 65%.
These are theoretical American option prices from the Bjerksund and Stensland model, not live quotes. Load any ticker in the call ratio backspread calculator above to run the same math on real market prices.
When to use a call ratio backspread
- You expect a large rally, for example after a catalyst, and want unlimited upside without paying much up front.
- Implied volatility is low and you expect it to rise.
- You want little or no loss if the stock falls sharply instead.
- Out of the money calls look cheap relative to the at the money call because of volatility skew.
Max profit, max loss and breakeven
Maximum profit
Unlimited. Above the upper breakeven, profit equals the stock price minus the upper breakeven, times 100, because one long call is uncovered and gains one for one with the stock.
Maximum loss
Long strike minus short strike, minus the net credit or plus the net debit, times 100. It occurs if the stock closes exactly at the long strike at expiration.
Breakeven
Upper breakeven equals the long strike plus the strike width, minus the net credit or plus the net debit. A lower breakeven exists only for a credit trade and equals the short strike plus the net credit; a debit trade simply loses the debit below the short strike.
Call Ratio Backspread Greeks
- Delta: Delta at entry can be slightly negative or slightly positive depending on strike spacing. As the stock rallies past the long strike, it climbs toward the delta of one long call and eventually of 100 shares.
- Gamma: Gamma is positive because you own more options than you sell, and it peaks near the long strike as expiration nears.
- Theta: Theta is negative, especially near the long strike, so a stalled stock costs you money each day.
- Vega: Vega is positive, so rising implied volatility helps and a volatility crush hurts.
See the live numbers for your position in the Greeks tab of the calculator, or explore a single option in the options Greeks calculator.
Early exercise and assignment risk
The only short option in a call ratio backspread is the at the money call, and your two long calls cover it. Early assignment becomes a real possibility once the stock rallies and that call goes deep in the money ahead of an ex dividend date, since holders often exercise the day before the ex date when the dividend exceeds the remaining time value. If that happens, you are short 100 shares and owe the dividend if still short on the ex date, while you keep both long calls at the higher strike.
Short stock plus one long call works like a long put, and you still hold the second long call, so the risk remains defined and the upside stays intact. You can buy back the shares and keep both calls, or close the whole position. Exercising a long call to cover gives up its time value, so it is rarely the best choice. Because the trade needs a rally, and a rally pushes the short call into the money, check dividend dates before entry.
The calculator's Early exercise risk tab flags short legs that are likely to be assigned. For a single option, use the early exercise calculator or read how early exercise and assignment work.
Pros and cons
Pros
- Unlimited profit potential on a strong rally.
- Can be opened for a small credit, leaving a small profit even if the stock falls sharply.
- Benefits from rising implied volatility.
- No uncovered short options, since the long calls cover the one short call.
Cons
- Maximum loss occurs at the long strike, so a modest rally can be the worst outcome.
- Time decay hurts if the expected move is slow or late.
- A volatility crush after an event can erase gains.
- The short call can be assigned early before an ex dividend date once the stock rallies.
How to manage a call ratio backspread
- Enter ahead of the expected catalyst and close soon after it if the move does not come.
- When the rally arrives, consider taking profits or selling one long call to lock in gains while keeping some upside.
- If the stock drifts toward the long strike late in the cycle, close or roll to a later expiration rather than accept the maximum loss.
- Many traders look for strike combinations that allow a credit entry, so that a drop does not create a loss.
Call Ratio Backspread FAQ
Is a call ratio backspread bullish?
Yes, a call ratio backspread is bullish: it profits most from a large rally, with no upper limit on gains. If opened for a credit, it also makes a small profit if the stock falls below the short strike. The worst outcome is a modest rise to the long strike.
What is the max loss on a call backspread?
The max loss on a call backspread is the strike width minus the net credit, or plus the net debit, times 100. It happens if the stock closes exactly at the long strike at expiration. The loss is defined because the short call is covered by the long calls.
When should you use a call ratio backspread?
Traders typically use a call ratio backspread when they expect a sharp rally and believe implied volatility is low. Because time decay works against it, it fits short windows around catalysts better than slow trends. The calculator shows how the payoff changes as time passes before expiration.
How does a call ratio backspread compare with a long call?
A call ratio backspread and a long call both have unlimited upside, but the backspread uses the short call to offset most or all of the cost. In exchange, its worst loss comes from a moderate rally to the long strike, and gains start only above a higher breakeven. A long call loses most if the stock falls, while a backspread opened for a credit can still profit in that case.
Related strategies
Put Ratio Backspread
A put ratio backspread sells one put and buys two lower strike puts in the same expiration, and it profits most from a sharp decline in the stock.
Call Ratio Spread
A call ratio spread buys one call and sells two higher strike calls in the same expiration, and it profits most when the stock rises to the short strike at expiration.
Long Call
A long call is the purchase of a single call option, which gives you the right to buy 100 shares at the strike price on or before expiration.
Call ZEBRA
A call ZEBRA, short for zero extrinsic back ratio, is a stock replacement strategy that buys two in the money calls and sells one at the money call so the time value you pay roughly cancels the time value you collect.
Educational tool, not financial advice. Calculations are theoretical and depend on your inputs; real fills, fees, early assignment and dividends can change results. Options involve risk and are not suitable for every investor.