Reverse Iron Butterfly Strategy for Indian Traders

What a Reverse Iron Butterfly Actually Is

The reverse iron butterfly is a four leg options spread you open when you expect a large move but you are not sure of the direction. It is the mirror image of the standard iron butterfly. The standard version sells the body and buys the wings to collect a credit and profit from a quiet market. The reverse version buys the body and sells the wings, so you pay a debit and you need the market to move.

The body is a long straddle, which is one bought call and one bought put at the same at the money strike. The wings are a short strangle, which is one sold call above and one sold put below at equal distance from the body. Because the at the money body options are always more expensive than the out of the money wings, the four legs together cost more than they bring in. That is why this trade is a net debit, never a net credit. If anyone describes a reverse iron butterfly as collecting a credit, the legs have been mixed up.

Selling the wings is what makes this cheaper than a plain long straddle. The premium you collect from the two short options reduces your outlay. The trade off is that the short wings cap how much you can make, because above the upper wing and below the lower wing your profit stops growing. You pay less than a straddle in exchange for giving up the unlimited tail.

The Four Legs at a Glance

Here is the structure laid out for a body strike we will call K, with wings sitting an equal number of points above and below. Notice that the two legs at the body strike are bought and the two outer legs are sold. The distance from the body to each wing must be the same to keep the payoff symmetric.

For the trade to make any sense the net debit must be smaller than the wing width. If you pay 205 points of debit on a 200 point wide structure there is no price at expiry where you can profit, because the most a 200 point wide butterfly can ever be worth is 200 points. Always check this before you place the order. Choose strikes where the body premium minus the wing premium leaves a debit comfortably below the gap between the body and the wing.

Worked Example on Nifty, Step by Step

Let us build a real reverse iron butterfly on the Nifty 50 weekly options. The numbers below are illustrative and chosen to be realistic for a normal volatility week. Live premiums change every second, so always read the actual NSE option chain before you trade. Nifty options trade in a lot of 65, so every one rupee of premium is worth 75 rupees per lot.

Assume Nifty spot is at 23,500 with a weekly expiry on the coming Tuesday. We pick 23,500 as the body and place the wings 300 points out, at 23,800 on the call side and 23,200 on the put side. The illustrative premiums are below.

The net debit per share is (150 plus 140) minus (55 plus 50), which is 290 minus 105, equal to 185 points. At 75 per lot that is a cash outlay of Rs 13,875 for one lot, before charges. This Rs 13,875 is also your maximum possible loss. You can never lose more than the debit you paid, because the bought body and sold wings cap the structure on both sides.

Breakevens, Maximum Profit and Maximum Loss

This is where the old version of this page was wrong, so read carefully. The breakevens are not at the wing strikes. They sit at the body strike plus and minus the net debit. With a 185 point debit on a 23,500 body, the upper breakeven is 23,500 plus 185, which is 23,685, and the lower breakeven is 23,500 minus 185, which is 23,315. Nifty has to close outside that band at expiry for the trade to make money.

• Maximum loss: the full net debit of 185 points, or Rs 13,875 per lot. This happens only if Nifty closes exactly at 23,500 at expiry, where all four options expire worthless.
• Lower breakeven: 23,315. Upper breakeven: 23,685. Between these two levels the trade is at a partial loss.
• Maximum profit: wing width minus net debit, which is 300 minus 185, equal to 115 points, or Rs 8,625 per lot. You reach this once Nifty is at or beyond a wing, that is at 23,800 or higher, or at 23,200 or lower.
• Beyond the wings the profit does not keep growing. A move to 24,500 pays exactly the same Rs 8,625 as a move to 23,800, because the short call you sold offsets the extra gain on your long call.

Let us sanity check the payoff at expiry at a few prices. At 23,800, your 23,500 call is worth 300 points and everything else expires worthless, so gross value is 300, minus the 185 debit gives a profit of 115 points, equal to Rs 8,625. At the upper breakeven of 23,685, the 23,500 call is worth 185 points, which exactly returns the debit, so profit is zero. At 23,500, every leg expires worthless and you lose the whole 185 point debit. The structure is fully symmetric on the downside, with the same Rs 8,625 cap reached at 23,200 and below.

Costs, STT and Taxes for Indian Traders

The clean payoff above ignores charges, but in real life they matter on a four leg trade. STT on options is charged at 0.1 percent of the premium on the sell side, so it bites on your two short wings and again on any legs you square off by selling before expiry. If your bought body options finish in the money and you let them get exercised, STT on exercised options is 0.125 percent on the intrinsic value, which is far higher, so most traders square off rather than hold to settlement.

On top of STT you pay brokerage on every leg in and out, plus exchange transaction charges, GST at 18 percent on brokerage and the SEBI turnover fee. With a discount broker on a flat fee per order, the round trip on this single lot four leg trade typically runs about Rs 200 to Rs 450 once every charge is added. That is a meaningful chunk of an Rs 8,625 maximum profit, so count it before you trade.

For tax, profit or loss from Nifty and Bank Nifty options is non speculative business income under Indian rules, not capital gains. It is added to your other income and taxed at your slab rate, and you can set off losses and carry them forward under the business income rules. The 20 percent short term and 12.5 percent long term capital gains rates that apply to delivery equity do not apply to F and O. Keep a clean trade log, because once your turnover crosses the prescribed limits a tax audit may be required.

When to Use This Structure

A reverse iron butterfly suits a known event with an unknown direction. Think of a Reserve Bank policy day, a union budget session, a large company earnings print, election results, or a heavy global data day. You believe the move will be sharp but you cannot call which way. The capped loss lets you take the position with a fixed, pre known risk, which is calmer than a naked long straddle where the cost can be brutal if volatility is already high.

Watch implied volatility closely. The danger with any long premium trade around events is that implied volatility is already inflated before the event and collapses the moment the news is out, a move traders call the volatility crush. If you pay up for an expensive body and the underlying moves only a little after the crush, you can sit inside the loss band even though the news was big. Enter when implied volatility is still reasonable relative to the move you expect, not at its peak.

• Good fit: a binary event soon, direction unclear, implied volatility not yet at an extreme, and you want a fixed maximum loss.
• Poor fit: a calm, range bound week with no catalyst, where time decay grinds the body down and you bleed the debit.
• Poor fit: entering right at peak implied volatility just before results, where the volatility crush can wipe the move you were paid for.
• Manage liquidity: stick to Nifty, Bank Nifty, FinNifty or very liquid single stocks so all four legs fill at tight spreads.

Reverse Iron Butterfly Versus Long Straddle

The closest cousin to this trade is the plain long straddle, which is just the body without the sold wings. The table below compares the two on the same 23,500 Nifty example, using a straddle that buys the same 23,500 call and put for a combined 290 points, against our reverse iron butterfly that nets to a 185 point debit after selling the wings.

The reverse iron butterfly is cheaper to put on and breaks even on a smaller move, since its breakevens of 23,315 and 23,685 are closer to spot than the straddle breakevens of 23,210 and 23,790. The price you pay for that is the capped profit. If you expect a runaway trend, a straddle keeps the open ended upside. If you expect a clean but contained pop, the butterfly gives a better cost base for the rupees at risk.

Exits and Position Management

Plan the exit before you enter. A sensible rule is to book profit once the trade has captured most of its capped gain, for example when the spread is worth around 80 to 90 percent of the 115 point maximum, rather than squeezing the last few points and risking a reversal. Because the profit is capped, holding for the final rupees rarely pays for the extra risk. On the loss side, many traders cut the position if the underlying stalls near the body and implied volatility starts falling, since time decay then works against the long body every day.

Time decay, or theta, is the quiet enemy here. The long at the money body loses value fastest as expiry nears if price does not move, while the short wings decay in your favour but by a smaller amount because they are cheaper. On a weekly Nifty trade the body can shed value quickly in the last two sessions. If the catalyst has passed and price is still near the body, the probability has shifted against you and the disciplined choice is usually to close.

• Set a profit target near the capped maximum and take it, do not get greedy on a capped trade.
• Set a loss exit, for example close if you lose half the debit while price stays inside the band with the event already past.
• Avoid holding a flat position into the last expiry session, where time decay on the body accelerates.
• Square off rather than letting in the money body legs go to exercise, to avoid the higher exercised options STT.

Frequently Asked Questions

Sources and Further Reading

For authoritative data and further reading on this topic, refer to NSE Option Chain, NSE India, Zerodha Varsity and Investopedia. Always confirm current rules, rates and contract specifications on the official source before you trade.