Short Call
Butterfly

What is a short call butterfly?

A short call butterfly is the inverted version of a butterfly built from call options at three evenly spaced strikes. You sell one lower-strike call, buy two middle-strike calls, and sell one higher-strike call — all in the same expiry. Because the two short wings out-value the two long body calls, the trade opens for a small net credit, which is your profit if the underlying moves away from the centre in either direction.

It is the mirror image of the long call butterfly: where the long version wants the price to pin the middle strike, this one wants it to leave. The single losing outcome is a close right at the centre, and even that loss is capped — making this a defined-risk way to bet on movement rather than direction.

Key takeaways

• A short call butterfly is a movement (volatility) bet — it profits when the underlying leaves the middle strike either way.
• It opens for a small net credit, which is also the maximum profit you can keep.
• The only loss happens if the price expires near the centre — and that loss is capped.
• Risk is defined on both sides, so margin is light versus a naked sale.
• Falling time value near the centre works against you; you want a decisive break, ideally early.

How it works

The legs sit at equal spacing — strikes A (low), B (middle) and C (high). You sell 1 call at A, buy 2 calls at B, and sell 1 call at C. The premium from the two short outer calls exceeds the cost of the two long body calls, so you collect a modest credit up front. The structure is fully wrapped, so the worst case is a known, capped figure and the SPAN + exposure margin blocked is far smaller than for an outright short call.

At expiry the payoff is an upside-down tent: you keep the full credit whenever the underlying finishes beyond either wing, and the position bleeds to its maximum (small) loss only if the price lands exactly at the middle strike. This is the opposite of a pinning trade — theta works against you while the price hovers near B, so the strategy rewards a quick, clean move and a fall in implied volatility hurts rather than helps once you are positioned for movement. For NIFTY and Bank Nifty the legs are cash-settled; single-stock legs carry assignment and physical-settlement nuances near expiry.

The numbers that matter

Worked NIFTY example

Suppose NIFTY is near 22,500 and you expect a sharp move into expiry but are unsure of the direction. You build an inverted butterfly around 22,500: sell the 22,300 call, buy two 22,500 calls, and sell the 22,700 call. The net credit is about ₹60. With a lot size of 75, you collect ₹60 × 75 = ₹4,500 up front (illustrative figures):

• Wing width: 200 points; max loss = (200 − 60) × 75 = ₹10,500 at 22,500.
• Max profit: ₹4,500, kept if NIFTY closes at or below 22,300 or at or above 22,700.
• Breakevens: 22,360 and 22,640.

NIFTY at expiry	Outcome	P&L (1 lot)
22,300 or below	All calls expire worthless	+₹4,500
22,360 (breakeven)	Edge of profit zone	₹0
22,500 (centre)	Worst case	−₹10,500
22,640 (breakeven)	Edge of profit zone	₹0
22,700 or above	Wings offset, credit kept	+₹4,500

Note the trade-off: you keep a small credit on any decisive move, but the centre is the danger zone where the capped loss is several times the credit. The reward is small and frequent; the loss is larger but rare and bounded.

When to use a short call butterfly

• You expect a breakout or sharp move but cannot call the direction with confidence.
• The underlying is coiled near a level ahead of an event, results or expiry, and you doubt it will pin there.
• Implied volatility is low, so the structure is cheap to set and a volatility expansion helps.
• You want a defined-risk way to fade a pinning view rather than buying a costly straddle.

Risks to respect

• Centre risk: a quiet market that settles near the middle strike delivers the full capped loss.
• Poor reward-to-risk: the credit is small relative to the worst-case loss, so timing and probability matter.
• Time works against you: while the price drifts near the centre, decay erodes the position rather than helping.
• Execution drag: four legs add brokerage and slippage that can swallow a thin credit.

Short call butterfly vs long call butterfly

These two are exact mirrors. A long call butterfly pays a debit and wins when the price pins the centre; the short call butterfly collects a credit and wins when the price leaves the centre. If you believe a stock or index will sit still, you go long the butterfly; if you think the market is wrongly pricing in a pin, you sell it. Same strikes, opposite expectations.

Short call butterfly vs long straddle

Both profit from movement, but the shapes differ. A long straddle buys an at-the-money call and put, so its upside grows with the size of the move — unlimited reward for a larger debit. The short call butterfly's gain is capped at the small credit and needs only a move past the wings, not a runaway one. The butterfly is cheaper and defined on both sides; the straddle pays far more on a big break.

Why is it called a “butterfly”?

The name comes from the payoff shape: a central body of two contracts flanked by two outer wings, like a butterfly's. The short (or reverse) version simply flips that diagram upside down — the body that peaks upward in the long butterfly now dips into the loss zone, while the wings sit in profit. Same anatomy, inverted profit.

Frequently asked questions

Is a short call butterfly bullish or bearish?

Neither — it is a movement bet. It keeps its small credit if the underlying moves away from the middle strike in either direction, and only loses if the price pins the centre.

What is the maximum profit on a short call butterfly?

The net credit received on entry. You keep it in full whenever the underlying expires beyond either wing strike.

What is the maximum loss on a short call butterfly?

The wing width minus the net credit, multiplied by the lot size, realised only if the price expires exactly at the middle strike. The risk is defined.

How is it different from a long call butterfly?

It is the mirror image. A long call butterfly profits when the price pins the centre and pays a debit; the short version collects a credit and profits when the price moves away.

The bottom line

The short call butterfly is a tidy, defined-risk way to fade a pinning view: collect a small credit and profit whenever the market makes a decisive move away from the centre. The structure is cheap and the worst case is known, but the reward is modest against the capped loss at the middle strike — so it suits traders who have a genuine reason to expect a break and want to keep risk bounded while doing it.

Related strategies & terms

• Long Call Butterfly — the mirror trade that profits on a pin.
• Short Put Butterfly — the put-based inverted butterfly with the same payoff.
• Long Straddle — an open-ended way to bet on a big move.
• Defined Risk · Breakeven · Implied Volatility