What is Butterfly Spread?

Indian market context (NSE)

Reference levels: Nifty 50 at 24,300, Reliance Industries at ₹1,300, Bank Nifty futures at 55,000 (lot size 30). Examples below show how Butterfly Spread shows up on Indian index, equity, and futures books — update to live quotes in your journal.

Nifty 50 perspective

Nifty at 24,300: weekly/monthly option chains centre on round strikes (24,000 / 24,500). Butterfly Spread on ATM Nifty options shifts quickly into expiry — India VIX and event risk (RBI, budget) reprice premiums independent of spot.

Reliance Industries perspective

Reliance at ₹1,300: stock options are American-style on NSE with liquidity concentrated near ATM strikes. Butterfly Spread behaviour on ₹1,300 handle differs from index options — watch assignment on short ITM legs before expiry.

Bank Nifty futures perspective

Bank Nifty futures at 55,000: hedging with options or trading butterfly spread on Bank Nifty weekly contracts — theta and gamma rise sharply into Thursday expiry; futures leg has no time decay but carries overnight gap risk.

How to validate

• Validate Butterfly Spread separately for index weeklies vs stock options.
• Stress-test with expiry-week and event-week subsets (RBI, budget, results).
• Confirm margin and tail-loss scenarios are logged for short premium books.
• Discard readings polluted by untagged discretionary adjustments.

How to track in TradeLyser

• Tag every leg: structure, DTE, moneyness, and whether Butterfly Spread was a primary driver.
• Log planned max loss ₹ on entry for short premium strategies.
• Weekly: list open short ITM/ATM legs before expiry with a written roll/close rule.
• Separate F&O account tags from cash equity for Butterfly Spread statistics.

Best practices

• Size Butterfly Spread trades with margin headroom for gaps and assignment.
• Prefer defined-risk structures when learning a new options concept.
• Roll or close based on written DTE rules, not convenience.
• Keep weekly index and monthly stock books in separate tags.

Common pitfalls

• Short premium without defined max loss while Butterfly Spread risk builds.
• Holding illiquid stock options into expiry without a plan.
• Blending index and stock gamma exposure in one tag.
• Ignoring margin spikes on gap opens.

How to use this in TradeLyser

Draw payoff at entry; log max profit zone vs spot at expiry.