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Neutral4 LegsDefined risk

Reverse Iron Butterfly

A defined risk long volatility trade. Buy an at the money straddle and sell wings to fund it, profiting from a sharp move either way.

By Team Agora Circle

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

Market outlook
Direction neutral, volatility bullish. You expect a sharp move from the current level.
Setup
Buy an at the money call and put, then sell an out of the money call and put as wings.
Max profit
Capped. The distance from the centre to a wing, minus the net debit.
Max loss
Limited to the net debit paid, lost if the price pins the centre strike at expiry.
Breakeven
Centre strike plus net debit on the upside, centre strike minus net debit below.
Implied volatility
Long vega. Rising implied volatility helps; a post event IV crush hurts.
Time decay
Time decay works against the long straddle core while the price sits at the centre.

Strategy Overview

A reverse iron butterfly is a long at the money straddle with its cost and reward capped by wings. You buy the call and put at the central strike, which gives the position its appetite for a move, and you sell a call and a put further out to reduce the cost. The payoff is a valley: worst at the centre, improving as the price moves away, and flat once it passes either wing.

It is the opposite of the ordinary iron butterfly. The iron butterfly sells the centre and profits when the market stands still; the reverse buys the centre and profits when the market moves. Both are fully defined risk, so the maximum loss and maximum profit are known before entry.

Compared with a plain long straddle, the reverse iron butterfly is cheaper because the wings fund part of the straddle, but the profit is capped rather than open ended. It fits a view that the market will move a defined distance from the current level, particularly around a scheduled catalyst.

How to Set It Up

Four legs around a central strike: a long straddle at the centre, a short strangle as wings.

  1. 1Buy the at the money call and the at the money put at the central strike. This is the long straddle core that carries the move.
  2. 2Sell an out of the money call above and an out of the money put below as the wings, collecting premium to lower the cost.
  3. 3The net debit is your maximum loss; the distance from the centre to a wing minus that debit is your maximum profit.

Payoff Diagram and Example

Max Profit

Capped. The distance from the centre to a wing, minus the net debit.

Max Loss

Limited to the net debit paid, lost if the price pins the centre strike at expiry.

Breakeven

Centre strike plus net debit on the upside, centre strike minus net debit below.

Reverse Iron Butterfly payoff diagram024,70025,00025,300BE 24,850BE 25,150Max profit +150ProfitLossNIFTY at expiry

Suppose NIFTY is at 25,000 before an event. You buy the 25,000 call for 110 and the 25,000 put for 105, then sell the 25,300 call for 35 and the 24,700 put for 30. The net debit is 110 plus 105 minus 35 minus 30, or 150 points. With a lot size of 75, the maximum loss is 150 x 75 = Rs 11,250.

The wings sit 300 points from the centre, so the maximum profit is 300 minus 150, or 150 points, about Rs 11,250, reached once the index closes at or beyond 25,300 or 24,700. Here the risk and reward happen to be equal, a clean one to one.

The breakevens are 25,150 and 24,850, the centre strike plus and minus the 150 point debit. If the index pins 25,000 at expiry, all four options expire worthless and the full debit is lost. The trade needs a move past a breakeven to profit.

Entering and Exiting

Enter all four legs as one package so the net debit is fixed and there is no leg risk.

Exit by closing the whole structure once a move has carried it toward the maximum, or before expiry to recover part of the debit if the move fails.

Because the risk is capped, the position can be held to expiry, but a sharp move soon after entry is what pays best, since the long straddle core decays quickly if the market stalls.

Time Decay (Theta)

The long at the money straddle at the core is highly sensitive to time decay, so a market that sits at the centre erodes the position from both legs. The short wings offset only a part of that.

This is why the reverse iron butterfly is an event or catalyst trade rather than a position to hold for weeks. The move needs to arrive before decay drains the straddle core.

Implied Volatility (Vega)

The net position is long vega, dominated by the at the money straddle, so a rise in implied volatility lifts it even before the price moves. Entering when volatility is cheap improves the odds.

The event caution is especially sharp here because the core is at the money and most exposed to IV. Buying into an event when IV is already inflated risks a crush that can outweigh a genuine but modest move.

Common Adjustments

If the index moves strongly one way, close the untested wing spread to bank premium and let the profitable side run to its cap.

If the move stalls at the centre, cutting early to save part of the debit usually beats holding an at the money long straddle into its worst decay window.

Widening the wings at entry lowers the cost but caps profit sooner; narrower wings cost more but pay more on a large move. Tune them to the size of move you expect.

Synthetic Equivalent

A reverse iron butterfly is a long at the money straddle combined with a short out of the money strangle at the wings. The short strangle caps both the cost and the reward of the long straddle core.

Equivalently it is a long call vertical plus a long put vertical that meet at the central strike, which is how it is usually entered and managed as a single four leg order.

Pros and Cons

Pros

  • Defined risk and defined reward, both known in advance.
  • Profits from a sharp move in either direction from the current level.
  • Cheaper than a plain long straddle because the wings help fund it.
  • Strongly long vega, so it gains if implied volatility rises.
  • Easy to size and hold through a known catalyst.

Cons

  • Profit is capped, unlike an open ended straddle.
  • The at the money core decays fast if the market stalls at the centre.
  • A pin near the centre strike at expiry loses the full debit.
  • Four legs mean more costs and more spread to cross; sensitive to an IV crush.

Frequently Asked Questions

How does this differ from a reverse iron condor?

Both are defined risk long volatility trades. The reverse iron butterfly buys the call and put at the same central strike, so it needs a slightly smaller move to profit but decays faster. The reverse iron condor buys them at separate inner strikes, which is a little cheaper to hold but needs the price to travel a bit further.

Why is my maximum profit sometimes smaller than my maximum loss?

Because the at the money straddle is expensive. When the net debit is more than half the distance to the wings, the capped profit is smaller than the debit at risk. Widening the wings or entering when the straddle is cheaper improves that ratio.

When does a reverse iron butterfly hit its maximum loss?

The net debit paid, lost only if the index pins the central strike at expiry. In the example that is 150 points, or Rs 11,250 on one lot.

When is this better than a long straddle?

When you expect a move of a roughly known size and want to spend less and cap the risk. You give up the straddle's open ended profit in return for a lower cost and a defined maximum loss.

Should I hold it into expiry?

Usually not if the move has not come. The at the money core suffers the heaviest time decay in the final days, so most traders exit once the catalyst has passed rather than letting the straddle bleed toward the centre.

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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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