Call Ratio Backspread: The Bullish Options Trade That Pays When the Rally Is Big

Most bullish options trades make you choose. Buy a call and you lose the premium if the stock falls. Sell a put and you cap your upside. The call ratio backspread tries to wriggle out of that choice: it is built to make real money on a sharp rally, make a little (or lose nothing) if the stock falls, and take its hit only if the price drifts into a middle zone and sits there.

That sounds like a free lunch. It isn’t. The trade has a very specific weak spot, and the whole skill lies in knowing where it is before you put the position on. Let’s build one from scratch, run the numbers, and see where it works and where it bites.

What a call ratio backspread actually is

The structure is simple. You sell one call at a lower strike and buy two calls at a higher strike, all on the same underlying and the same expiry. That 1:2 ratio is the defining feature. Wikipedia’s entry on the backspread describes the call version as a bullish trade where you write calls and buy more calls at a higher strike, with unlimited profit and limited risk, used when you expect the underlying to rise sharply. It is also called a reverse ratio spread, because it flips the ordinary ratio spread, where you sell more options than you buy.

Zerodha Varsity’s chapter on the call ratio back spread spells out the Indian-market version: sell one in-the-money (ITM) call, buy two out-of-the-money (OTM) calls, and keep the ratio intact whatever size you trade. Two bought for one sold, four for two, and so on. Same expiry, same underlying, no exceptions.

Why ITM on the short side? Because an ITM call carries a fat premium. That one premium can pay for both OTM calls and still leave some money over. When it does, you open the trade for a net credit, cash comes into your account on day one, and that credit is what you keep if the market falls instead of rising.

Who this trade is for

The backspread suits a trader who is outright bullish, not mildly hopeful. Varsity draws exactly this line: bull call spreads and bull put spreads are for a moderately bullish view, while the ratio back spread is for when you expect a decisive move up. If you think a stock will grind 2% higher over a month, this is the wrong tool. The trade needs distance, and it needs it before expiry.

Think of situations where a stock has been coiling for weeks, a result or a big announcement is due, and you believe the move, when it comes, will be large. You are not sure enough to pay for naked calls and watch them bleed if nothing happens. The backspread gives you a different kind of insurance: if you’re completely wrong on direction, you don’t pay much, if anything.

A backspread is not cheap insurance against being wrong. It is cheap insurance against being badly wrong, paid for by accepting a bigger loss when you are only half right.

A worked example in rupees

The figures below are hypothetical, chosen to keep the arithmetic clean. They are not quotes for any real stock.

Say Company R trades at ₹1,000 with about a month to expiry. You expect a big move up. You set up the backspread like this:

• Sell 1 call at the ₹980 strike (ITM) for a premium of ₹40.
• Buy 2 calls at the ₹1,040 strike (OTM) for ₹14 each, so ₹28 in total.

Net credit = ₹40 − ₹28 = ₹12 per share. Now let’s see what happens at expiry at different prices. At expiry a call is worth only its intrinsic value, which is the larger of (spot − strike) and zero.

Look at the shape. Below ₹980 the result is flat at +₹12, the credit you collected. Between the strikes, things get worse with every rupee the stock gains, because the short call is losing value and the long calls are still worthless. The worst point is exactly ₹1,040, the higher strike, where you lose ₹48 a share. Above that, each extra rupee adds a rupee of profit, since two long calls minus one short call leaves you net long one call. There is no ceiling.

If we assume, purely for illustration, a lot of 500 shares, the credit would be ₹6,000, the worst case a loss of ₹24,000, and a close at ₹1,200 a gain of ₹56,000. Real lot sizes are set by the exchange and differ from stock to stock, so redo this with the actual contract before trading.

The formulas behind the payoff

Varsity boils the trade down to a handful of relationships, and they match our example:

• Spread = higher strike − lower strike. Here, ₹1,040 − ₹980 = ₹60.
• Net credit = premium received on the lower strike − 2 × premium of the higher strike. Here, ₹40 − ₹28 = ₹12.
• Maximum loss = spread − net credit, and it occurs at the higher strike. Here, ₹60 − ₹12 = ₹48 at ₹1,040.
• Payoff if the market falls = the net credit, ₹12.
• Lower breakeven = lower strike + net credit, ₹980 + ₹12 = ₹992.
• Upper breakeven = higher strike + maximum loss, ₹1,040 + ₹48 = ₹1,088.

Varsity’s own illustration uses an old Nifty example: spot at 7,743, sell one 7,600 call for ₹201, buy two 7,800 calls at ₹78 each. That gives a ₹45 net credit, breakevens at 7,645 and 7,955, a maximum loss of ₹155 at 7,800, and a ₹145 profit if the index expires at 8,100. Same shape, bigger numbers.

The valley in the middle is the real risk

Here is the part people skip. The worst outcome is not a crash. It’s a modest rally that stalls right at your upper strike. In our example, Company R rising from ₹1,000 to ₹1,040, a perfectly respectable 4% gain, produces your maximum loss. You were right on direction and still lost four times the credit you collected.

So the honest question before entering is not “Am I bullish?” It’s “Do I think this stock can get beyond ₹1,088 before expiry, and not just to ₹1,040?” If you can’t answer yes with some conviction, a plain bull call spread is probably the better fit.

How it compares with just buying a call

Suppose instead you had simply bought one ₹1,040 call for ₹14. At expiry:

• At ₹900, the plain call loses ₹14. The backspread makes ₹12.
• At ₹1,040, the plain call loses ₹14. The backspread loses ₹48.
• At ₹1,200, the plain call makes ₹146. The backspread makes ₹112.

That trade-off is the whole story. The single call is cheaper to be wrong with in the middle and earns more on a huge move per call bought. The backspread turns a fall into a small win, but it pays for that with a deeper valley around the upper strike and slightly lower profit on the way up. Neither is strictly better. They answer different worries.

You were right on direction and still lost four times the credit you collected. That is the trade to rehearse in your head before placing a backspread.

Picking strikes and timing

Varsity ran the trade against different strike pairs and times to expiry and came to a clear conclusion: when there is ample time left, selling a slightly ITM call and buying slightly OTM calls tends to work best, and pairs with far OTM long calls tend to lose money even when the direction is right. The reason is intuitive. Far OTM calls need a monster move to come alive, and if the move arrives late, they may still expire worthless.

In its second set of scenarios, where the move came in the second half of the series, the better combination shifted to a deeper ITM short call with a slightly ITM long call. The lesson we take from this is that strike choice has to match when you expect the move, not just how big it will be.

What volatility does to the trade

Because you are net long options, a rise in implied volatility usually helps when there is plenty of time left. Varsity’s example showed the position’s value improving from −₹67 to +₹43 when volatility rose from 15% to 30% with 30 days to expiry, and from −₹77 to −₹47 with about 15 days left.

Close to expiry the picture flips. Varsity found that a jump in volatility with only a few days remaining actually hurt the position. Its explanation is that with only a few days left, higher volatility raises the chance of the options expiring out of the money, so the premium falls. The practical takeaway: a backspread placed early in the series on a stock where you expect both a move and a volatility pickup sits on the right side of the trade. Placed in expiry week, the same view can work against you.

The flip side also matters. If implied volatility is already very high when you enter, you are buying expensive OTM calls, and a later fall in volatility can hurt even if the stock does what you expected. Varsity says it would hesitate to use this strategy at the start of a series if volatility is on the higher side, giving more than double the usual reading as an example.

Practical checks before you place one

1. Keep the ratio exact. One short to two long. Placing only the short leg, even for a few seconds in a fast market, leaves you with a naked short call.
2. Check the margin your broker blocks. The short ITM call carries margin. Look at the combined requirement for the full position before you trade, not just the premium.
3. Mark both breakevens and the valley. Write down the lower breakeven, the maximum-loss strike and the upper breakeven. If the stock settles near the higher strike as expiry approaches, decide in advance whether you will exit or hold.
4. Watch liquidity on the OTM strike. You are buying twice as many of those, so a wide bid-ask spread costs you double.
5. Know your exit before your entry. Our guide to risk management in trading covers how to size positions so one bad expiry doesn’t wreck a month.

The bearish twin

Flip the calls for puts and you get the put ratio backspread: sell one higher-strike put and buy two lower-strike puts, aiming for a sharp fall. We covered it in detail in our post on the put ratio backspread, and the logic mirrors this one, valley and all. If you are holding short options into the final day, read our explainer on pin risk in options too, because a backspread with a short ITM call can run straight into that problem.

Where this leaves us

The call ratio backspread is a good trade for one particular view: a big move up, soon, with a fall being acceptable and a stall being the real danger. Get the strikes close to the money, leave enough time, and avoid entering when volatility is already stretched. Above all, rehearse the ₹1,040 scenario in our example, the one where you’re right and still lose, until you’re comfortable with it. If that outcome would rattle you, stick with a simpler spread.

Disclaimer: This article is for educational purposes only and is not investment advice. The Company R figures and the 500-share lot are hypothetical. Options trading carries a high risk of loss, and margins, lot sizes and exchange rules change from time to time, so check the current contract specifications and your broker’s requirements, and consult a SEBI-registered adviser before trading derivatives.