Strota / Iron Butterfly — Tighter Range, Higher Credit

Iron Butterfly — Tighter Range, Higher Credit

Sell straddle at ATM + buy wings further OTM. Defined-risk short straddle. Higher reward, narrower window than iron condor.

Build an iron butterfly →

Iron butterfly = sell ATM straddle + buy OTM strangle as wings. A short straddle with defined risk. Higher credit than iron condor but narrower profit zone.

Best when you're confident the underlying will stay very close to a specific strike — typically post-event when IV has crushed and you don't expect another catalyst.

Worked NIFTY example

Post-RBI, NIFTY at 22,000, IV crushed to 13%, quiet outlook.

Sell 22,000 CE at ₹100 + Buy 22,200 CE at ₹35 = +₹65 net credit on call side.

Sell 22,000 PE at ₹95 + Buy 21,800 PE at ₹30 = +₹65 net credit on put side.

Total credit = ₹130 × 25 = ₹3,250 per lot.

Max profit (NIFTY exactly at 22,000) = ₹3,250. Max loss = (200 - 130) × 25 = ₹1,750 per lot.

Reward:risk ≈ 1.85:1 — much better than iron condor but narrower profit window.

Butterfly vs condor

Butterfly: short strikes identical (ATM), maximum credit at the strike, narrow profit zone.

Condor: short strikes separated, lower max credit but wider profit zone.

If you have strong conviction about the exact level, butterfly. If you expect a range without a specific anchor, condor.

When iron butterfly works

Pinned markets. Post-major-news days when NIFTY is settling near a clear level.

Low IV with no scheduled events. Theta + low Vega risk is the income source.

Expiry-week pinning. NIFTY often pins near max-pain on Thursday — butterfly at max pain often profits.

What to do with this: Place iron butterflies at the projected max-pain strike on expiry week, not at current spot. The market often drifts toward max-pain through the week — your butterfly's max profit lines up with where institutions are positioning for settlement.

Common misreads

Treating the butterfly like a condor. The profit zone is narrow — you need the underlying to stay within ~1% of the strike, not just within a 4% range.
Placing butterflies in volatile markets. The strict ATM dependence makes them sensitive to any move at all.
Setting wings too far out. Wide wings collect more credit but if assignment happens at expiry, the spread becomes wider than the credit can offset.

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Iron Condor

Calendar Spread

Key takeaways

Short ATM straddle + long OTM wings.
Higher max profit than iron condor but narrower win zone.
Best for confident pin-level trades — post-event, low-IV, near max pain.
Reward:risk typically 1.5:1 to 2.5:1.

Iron butterfly — clarifications

When is iron butterfly better than iron condor?

When you have strong conviction about the specific level the underlying will settle at. Butterfly's narrow profit zone is acceptable only when you're confident in the anchor point.

Should I place iron butterfly at spot or at max pain?

Max pain often, especially in expiry weeks. NIFTY tends to gravitate toward max pain by Thursday close, so placing the butterfly at max pain captures this directional drift while still benefiting from time decay.

How wide should the wings be?

Common: 200 points on NIFTY (so total spread width is 200 each side). Tighter wings reduce max loss but also reduce credit; wider wings increase both.

What's the win rate?

Lower than iron condor — typically 40-60% because of the narrow profit zone. But the higher reward:risk compensates. Net expectancy depends on entry conditions.

Can I close one side of an iron butterfly?

Yes — if NIFTY drifts toward the call side, you can close the put credit spread first (it's already near max profit) and let the call spread run. Locks in part of the gain while keeping the threatened side managed.