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Neutral3 LegsDefined risk

Call Butterfly

Buy one lower call, sell two middle calls, buy one higher call. A cheap, defined risk bet that the market pins the middle strike.

By Team Agora Circle

Written by the Agora Circle editorial team. Educational content, explained for the Indian market. Not investment advice.

Market outlook
Neutral, low volatility. You expect the index to finish near the middle strike.
Setup
Buy 1 lower call, sell 2 middle calls, buy 1 higher call, evenly spaced.
Max profit
Capped. The distance between strikes minus the net debit, at the middle strike.
Max loss
Limited to the small net debit paid, at or beyond either outer strike.
Breakeven
Lower strike plus net debit, and upper strike minus net debit.
Implied volatility
Short vega near the middle. Falling implied volatility helps as expiry nears.
Time decay
Time decay works in your favour when the price is parked near the middle strike.

Strategy Overview

A call butterfly is a low cost, defined risk way to bet that the market will finish near a specific level. It combines a long call spread and a short call spread that share the same middle strike, using three strikes in a one, two, one ratio: buy one lower call, sell two middle calls, buy one higher call. The payoff is a tent, peaking at the middle strike and sloping down to a small fixed loss on either side.

The appeal is a large potential reward for a very small outlay. Because the two sold calls finance most of the two bought calls, the net debit is tiny, and that debit is the entire risk. If the index pins the middle strike at expiry, the position pays several times the cost.

The catch is precision. A butterfly only reaches its peak in a narrow zone around the middle strike, so it rewards a correct and specific view of where the market will settle. It is a pinning trade for a calm, range bound expectation, not a directional punt.

How to Set It Up

Three strikes, evenly spaced, in a one two one ratio built entirely from calls.

  1. 1Buy 1 call at a strike below your target level.
  2. 2Sell 2 calls at the target middle strike, which is where you expect the index to finish.
  3. 3Buy 1 call at an equal distance above. The small net debit is your maximum loss.

Payoff Diagram and Example

Max Profit

Capped. The distance between strikes minus the net debit, at the middle strike.

Max Loss

Limited to the small net debit paid, at or beyond either outer strike.

Breakeven

Lower strike plus net debit, and upper strike minus net debit.

Call Butterfly payoff diagram024,80025,00025,200BE 24,840BE 25,160Max loss -40ProfitLossNIFTY at expiry

Suppose NIFTY is at 25,000 and you expect it to stay near that level into expiry. You buy the 24,800 call for 320, sell two 25,000 calls for 200 each, and buy the 25,200 call for 120. The net debit is 320 minus 400 plus 120, or 40 points. With a lot size of 75, the maximum loss is 40 x 75 = Rs 3,000.

If the index finishes exactly at 25,000, the lower call is worth 200, the two sold calls expire worthless, and the upper call expires worthless, for a peak profit of 200 minus the 40 debit, or 160 points, about Rs 12,000. That is four times the amount risked.

The breakevens are 24,840 and 25,160. Beyond 25,200 or below 24,800 the whole structure settles at its maximum loss of 40 points. The profit zone is the narrow band around 25,000.

Entering and Exiting

Enter all three legs together as one order so the ratio and the net debit are fixed.

Value builds only as expiry nears and the index sits near the middle, so butterflies are often held closer to expiry than other trades, when the tent shape sharpens.

Exit by closing the package. Many traders take profit when the position has captured a good fraction of its peak, rather than risking a late drift away from the middle strike in the final hours.

Time Decay (Theta)

Time decay is a friend here when the index is near the middle strike, because the two sold middle calls lose value faster than the bought wings. As expiry approaches, a well placed butterfly gains value from that decay.

If the index sits away from the middle, decay works less in your favour, and the position simply drifts toward its small maximum loss. The peak only forms right around the central strike.

Implied Volatility (Vega)

Around the middle strike the position is net short volatility, so falling implied volatility helps it as expiry nears. A drop in IV compresses the sold middle options in your favour.

Because the maximum loss is so small, the volatility exposure is modest in rupee terms. The dominant driver of the outcome is where the index finishes, not the path of implied volatility.

Common Adjustments

If the index drifts toward one wing, you can roll the whole butterfly in that direction, recentring the middle strike on the new expected level.

A butterfly can be widened, using strikes further apart, to create a larger profit zone at a higher cost, or narrowed for a cheaper, more precise bet.

Because the risk is tiny and fixed, the simplest response to a losing butterfly is often just to let it expire or close it, rather than adjusting an already cheap position.

Synthetic Equivalent

A call butterfly is a long call vertical, buy the lower call and sell the middle call, combined with a short call vertical, sell the middle call and buy the upper call. The shared middle strike is why two calls are sold there.

It has essentially the same payoff as a put butterfly at the same strikes, and as an iron butterfly built from a call spread and a put spread, so the choice among them is driven by which options price better.

Pros and Cons

Pros

  • Very low cost, so the maximum loss is small and known.
  • Large reward relative to the tiny debit if the index pins the middle strike.
  • Fully defined risk with no margin obligation beyond the debit.
  • Time decay works in your favour near the middle strike.
  • Flexible: the strikes and width can be tuned to your expected range.

Cons

  • The profit zone is narrow, so the view has to be precise.
  • Full profit is rarely captured, since it needs a near perfect pin at expiry.
  • Three legs mean more brokerage and more bid ask spread to cross.
  • Away from the middle strike, the position quietly settles at its maximum loss.

Frequently Asked Questions

When should I use a call butterfly?

When you expect the index to finish near a specific level and volatility to stay low. It is a precision, range bound trade that pays well for a correct pin and costs very little when wrong.

Is a call butterfly bullish or bearish?

Neither, really. It is a neutral, pinning trade centred on the middle strike. You can shift the whole structure higher or lower to lean slightly bullish or bearish, but at heart it bets on where the market settles, not on direction.

Why do I rarely capture the full profit?

Because the peak only occurs if the index finishes exactly at the middle strike at expiry. In practice the price drifts, so most traders bank a portion of the potential profit rather than holding out for a perfect pin.

What happens to a call butterfly if the index closes outside the outer strikes?

The small net debit paid, reached at or beyond either outer strike. In the example that is 40 points, or Rs 3,000 on one lot.

Call butterfly or put butterfly, which should I use?

For the same strikes they have almost identical payoffs, so the choice usually comes down to liquidity and pricing on the day. Traders pick whichever set of options, calls or puts, is trading with tighter spreads at those strikes.

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This page is for education only. It is not investment advice, and nothing here is a recommendation to buy or sell any instrument. Options involve substantial risk, and option sellers can lose far more than the premium they receive. Please do your own research or consult a SEBI registered investment adviser before trading. Read our full disclaimer.

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