Iron Condor Calculator
Iron condor calculator. 4-leg defined-risk options strategy. Max profit, max loss, two breakevens, profit zone width, return on margin. The theta-decay strategy for range-bound markets.
Iron Condor Calculator
How to use the iron condor calculator
Pick the underlying + expiration
Iron condors work best on liquid, range-bound underlyings with high implied volatility. SPY, QQQ, IWM are classic candidates. Expiration: 30-45 days is the sweet spot — fast theta decay, enough time to manage adjustments. Weekly options (7-14 days) are too fast to manage, monthlies (45-day) are the standard.
Set the short strikes (A + C) — the income legs
Short put strike (A): BELOW current price; collect premium for assuming the obligation to buy at A if assigned. Short call strike (C): ABOVE current; collect premium for the obligation to sell at C. Most traders target 16-20 delta strikes — approximately 1 standard deviation moves, giving ~80% probability of staying inside the range.
Set the long strikes (B + D) — the hedges
Long put strike (B): BELOW short put (B < A). Limits maximum downside loss to the put spread width − net credit. Long call strike (D): ABOVE short call (D > C). Limits maximum upside loss. Typical spread width: $5 for stocks, $10-25 for indexes. Wider spreads = more credit but more risk; narrower = less credit but less max loss.
Enter all four premiums
For each leg: enter mid-market option price from your broker's option chain. Net credit = (short put premium − long put premium) + (short call premium − long call premium). The whole iron condor is a net-credit trade — you collect premium upfront, hoping the stock stays inside the range to keep all of it.
Read max profit, max loss, breakevens
Max profit: keep the entire net credit IF stock expires between A and C (the profit zone). Max loss: stock expires beyond B or beyond D = lose the spread width minus credit. Breakevens: lower = A − net credit; upper = C + net credit. Outside these breakevens, you lose money. The wider the profit zone, the higher your win rate but the lower your premium.
The iron condor — defined-risk theta strategy
The iron condor is the most popular defined-risk options strategy for traders betting on range-bound (neutral) markets. It combines two credit spreads — a bull put spread below current price + a bear call spread above current price — into a single 4-leg position. The strategy profits if the underlying stays within the range between the short strikes through expiry, collecting time decay (theta) as the options expire worthless. The "defined risk" comes from the long-side wings (B and D strikes) which cap the maximum possible loss. Unlike naked short options or short straddles (which have undefined risk), iron condors are loved by retail traders and professional vol-selling funds alike for their bounded downside.
How traders set them up
Two common setups. The "delta 16" iron condor: short strikes at ~16 delta (roughly 1 standard deviation from current price) — high probability of staying in the range (~70-80% win rate) but lower premium. Most theta-decay strategies use this. The "delta 25-30" iron condor: short strikes closer to current — higher premium but lower win rate (~60-70%). Higher reward, more frequent assignment / management. Spread widths typically $5 for most equities, $10-25 for indexes. The tastytrade and OptionAlpha communities standardised the 45-day-to-expiry / 16-delta setup as the canonical iron condor template, with management rules (close at 50% of max profit, defend at 21 days to expiry).
Iron condors look magical on paper — collect premium, do nothing, watch options expire worthless. Reality: managing them requires discipline. Stocks move; the 20-30% of trades that breach the range tend to wipe out 3-4 winning trades worth of gains.
When iron condors win and lose
Iron condors profit in three scenarios: (1) Stock moves nowhere — all four options expire worthless; you keep entire credit. (2) Stock moves modestly — finishes inside the profit zone between short strikes; full premium. (3) IV drops sharply — the position has negative vega, so falling implied vol shrinks all four option prices, allowing early closure for profit. Iron condors lose when: (a) stock breaches a short strike at expiry — one wing becomes ITM and gets assigned. (b) IV spikes (earnings, macro shock) — though you wait for expiry, you may face margin calls if the position\'s mark-to-market loss grows. (c) Stock keeps trending past breakeven through expiry. The classic risk: 3-4 winning months get wiped out by one big losing month if you don\'t manage proactively.
ASEAN access
For ASEAN retail traders running iron condors, the best market access is generally US-listed options via offshore brokers. Singapore + Hong Kong traders frequently use Interactive Brokers, Tiger Brokers, Webull. SPX, SPY, QQQ provide the deepest, most liquid iron condor markets globally. HKEX HSI options can support iron condors but with wider bid-ask spreads. Malaysia, Indonesia, Vietnam: limited local options access — most retail iron condor activity happens through US brokers. Australia has reasonable ASX 24 options liquidity for ASX 200 names. Across markets, the strategy mechanics are identical; only the underlying liquidity differs.
10 Things to Know About Iron Condors
4 legs: short put + long put (bull put spread below) + short call + long call (bear call spread above).
Profit zone: stock between A (short put) and C (short call) at expiry. Win rate ~70-80% for 16-delta setups.
Max profit = net credit; Max loss = max spread width − credit. Defined risk on both sides.
Two breakevens: lower = A − credit, upper = C + credit. Outside these, you lose.
45 days to expiry, 16 delta short strikes: the tastytrade canonical setup. Industry-standard template.
Iron condors are negative vega — they profit from falling IV. Best opened after IV spikes.
Common management rule: close at 50% of max profit; defend at 21 days to expiry by rolling or closing.
Risk pattern: frequent small wins + occasional big losses. Like selling insurance.
Margin requirement ≈ max loss per contract (Reg-T). Iron condors use less buying power than naked short options.
Popular underlyings: SPX, SPY, QQQ, RUT — high liquidity, tight bid-ask, predictable behaviour.
Frequently asked questions
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Yes. A regular condor uses 4 calls (or 4 puts) of all the same type. An iron condor uses 2 puts + 2 calls — the "iron" means mixed put-call legs. Iron condors are more common because the put and call spreads can be set up at different distances from current price (asymmetric setups for directional bias) and because they typically have slightly better credit profiles. The math + risk analysis is identical for both.
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Trade-off between premium and win rate. 16 delta short strikes: ~84% probability stock stays inside; lower credit, higher win rate. 20-30 delta: ~70-80% inside probability; higher credit, more management. 5-10 delta: ~90%+ inside probability; tiny credit, hardly worth the slippage. Most professional theta-decay strategies stick around 16 delta — academic studies of iron condor performance (e.g. Lowes 2018) suggest this is roughly optimal long-term.
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Industry-standard rule: close at 50% of max profit. If your max profit is $200 and current P&L is +$100, close. Reasons: (a) most theta decay happens after that point, marginal gain isn\'t worth incremental gamma risk, (b) closing frees up margin for next trade, (c) reduces "going from winner to loser" near expiry. Alternative: close at 21 days to expiration regardless of P&L — avoids "gamma week" where stock moves can quickly destroy profits. The tastytrade community has popularised these mechanical rules; backtests support them.
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When stock approaches a short strike, three responses: (1) Close the entire trade — accept loss, move on. Most conservative. (2) Roll the threatened side — e.g. stock rallying toward short call: buy back the call spread and sell a new one further OTM, possibly extending expiration. Collects additional credit but increases position duration. (3) Add the opposite side — if stock rallies, add another call spread; combines into an "iron butterfly" — different P&L profile. Defensive adjustments often turn a losing iron condor into break-even, but each adjustment increases your overall exposure.
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Same idea (short put + short call, profit if stock stays in range) but short strangle has NO long wings — undefined risk on both sides. A short strangle collects more premium (no long-side debit) but a black-swan move could wipe out the account. Iron condor sacrifices ~30-40% of premium for capped max loss. For retail traders or anyone with limited capital, iron condor is strictly safer. For hedge funds with deep capital and dynamic hedging, naked short strangles can be more capital-efficient. Most beginners should never trade naked short strangles.
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Poorly. Iron condors are explicitly directional-NEUTRAL strategies that profit from stocks staying within a range. In strongly trending markets (Q4 2020-2021 SPY rally, Q1-Q2 2022 SPY decline), short strikes get breached repeatedly. Vol-selling funds often lose money during sustained trends. Better strategies for trending environments: directional spreads (bull call spread, bear put spread), diagonals, calendars, or simply trend-following with long options. Iron condors thrive in low-IV, sideways consolidation periods.
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Yes, but with caveats. Earnings iron condors: open just before earnings to capture the IV crush (post-earnings IV drops 30-60% reliably). Use very wide strikes to give the stock room to move. Profit from the IV collapse, not directional accuracy. Risks: a binary earnings surprise can blow through both wings simultaneously. Avoid running through earnings: if you hold a routine iron condor into an earnings event, you take binary risk you didn\'t price for. Typically: close before earnings, reopen post-earnings if you want to trade the IV crush directly.
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Under Reg-T: iron condor margin ≈ max loss per contract. If put spread width is $5 and call spread width is $5, max loss is ~$500/contract minus net credit. So a $200 credit iron condor with $5-wide spreads has margin of ~$300/contract. Portfolio margin (for accounts > $125K typically) reduces requirements based on overall portfolio risk. Brokers may charge more for less-liquid underlyings. Always check your broker\'s exact margin formula before opening.
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No. All 4 strike + premium inputs + contract size + days stay in your browser. Iron condor calculation runs entirely client-side. Open DevTools → Network when you click Calculate and you\'ll see zero outbound requests.
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Standard references: McMillan L., Options as a Strategic Investment, Ch.8 — multi-leg strategies. Natenberg S., Option Volatility & Pricing — the theoretical framework. tastytrade (tastytrade.com) — free podcast + research focusing heavily on iron condor mechanics. OptionAlpha, The Options Mastery Course — detailed iron condor management framework. Academic: Lowes A. "Backtesting the 16-delta Iron Condor" (2018) — empirical performance study.
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