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A three-leg options strategy that buys more calls than it sells, giving unlimited upside on a big rally, a defined maximum loss on a moderate move, and — unusually — a small profit if the underlying barely moves at all.

One of the more advanced options trading strategies covered here — it has a genuinely different payoff shape from a simple spread, so it's worth understanding the mechanics fully before using it, not just the summary numbers.

A Call Ratio Backspread sells a smaller number of near-the-money calls and buys a larger number of further out-of-the-money calls — most commonly in a 1:2 ratio, which is what this page uses throughout. The word "backspread" specifically means you're net long more contracts than you're short, which is what gives the position unlimited upside — it behaves like a Long Call once the underlying rises far enough, just funded partly (or entirely) by the premium collected from the short call.

The single short call funds most or all of the cost of the two long calls — in this example, it more than funds them, leaving a net credit. The two long calls are what create the unlimited upside; the single short call is what creates the defined-loss zone in between.

This is the most important section to read carefully, because the payoff shape genuinely isn't a simple line or a single flat zone — it moves through four distinct behaviors as the underlying rises:

1. At or below the short strike — all three legs expire worthless, and you keep the net credit collected upfront. This is a flat profit zone, not the strategy's "main" profit case, but a real one.
2. Between the short strike and the long strike — the short call is now working against you while the long calls are still worthless, so profit shrinks as the underlying rises, crossing into a loss partway through this zone.
3. At the long strike — this is where the maximum loss occurs. The short call's cost against you is at its highest, and the long calls have only just started to gain value.
4. Above the long strike — both long calls are now gaining value twice as fast as the single short call is losing it, so the position recovers, crosses back to breakeven, and then grows without limit as the underlying keeps rising.

In other words: small profit if nothing happens, a real loss if the underlying makes a moderate move up, and a return to profit — then unlimited profit — if it makes a large move up. This is why the strategy is often described as bullish and volatility-driven: it specifically dislikes a moderate move, and rewards either no move or a big one.

A Call Ratio Backspread fits a view that the underlying will either stay flat or make a large move higher — and specifically, a view that a moderate, middling rise is the least likely outcome. It's often used when implied volatility is relatively low but a trader expects a big move (an event, an earnings-style catalyst, or similar), since the strategy benefits from a volatility expansion as much as from the directional move itself.

Suppose Nifty is trading at 24,000 with a weekly expiry coming up, and lot size is 65. You think a big rally is plausible, but a small-to-moderate one is not your base case.

1. Confirm the setup. You're open to a flat market or a big rally, but want to avoid being hurt by a moderate rise specifically.
2. Sell 1 call at the 24,000 strike, collecting a premium of 145.
3. Buy 2 calls at the 24,300 strike, paying a premium of 60 each — 120 total.
4. Calculate the net credit: 145 − 120 = 25 points, or ₹1,625 at this lot size. You're paid to enter this trade, since the single short call's premium exceeds the cost of the two long calls.
5. Understand the flat zone: at or below 24,000, all legs expire worthless and you keep this ₹1,625 credit.
6. Understand the loss zone: the position loses money between roughly 24,025 and 24,575, bottoming out at a maximum loss of ₹17,875 exactly at the 24,300 strike.
7. Understand the recovery: above 24,575, the position is profitable again, and keeps growing without limit as Nifty rises further — it behaves like an ordinary Long Call from this point on.
8. See how it resolves at expiry:
   • Nifty finishes at or below 24,000 → flat profit of ₹1,625.
   • Nifty finishes at 24,300 (the long strike) → maximum loss of ₹17,875.
   • Nifty finishes well above 24,575, say at 25,500 → a large, uncapped profit that keeps growing the higher it goes.

Quick reference for the same trade:

Based on the worked example above. Notice the dip to a loss between the two strikes before the line turns back up and keeps climbing — that shape is the whole point of this strategy. Move the cursor over the chart to see profit/loss at any price.

• The strategy specifically loses on a moderate move. If you're wrong about the "flat or big move" thesis and the underlying drifts moderately higher instead, this is the worst-case scenario for the position, not a mild disappointment.
• Three separate legs means three separate execution costs (bid-ask spread on each) — the real-world cost of entering this position is higher than a simple two-leg spread, which eats into the net credit.
• Assignment risk on the short call exists in principle, though NSE index options are typically European-style and cash-settled, removing early-assignment risk specifically.
• This is not a beginner strategy. The non-obvious payoff shape means it's easy to misjudge the risk if you're not comfortable reading a payoff diagram carefully first.