OF Options Force

Open the interactive version →

Case Study: Defending a Tested Iron Condor

Case Study: Defending a Tested Iron Condor

A neutral premium seller opens a defined-risk iron condor, watches the underlying trend down toward the short put, and defends the textbook way — by rolling the untested call spread toward the price for a credit. We follow the trade from entry through the defense roll to two resolutions (a win and a capped loss), tying every decision to a cited rule and showing the new breakevens at each step.

This is an illustrative, fully worked example. All numbers are realistic round figures chosen to expose the mechanics — not a live trade, not a recommendation, and not a backtest result. For the strategy fundamentals behind every step here, read this alongside the iron condor entry, the management rules in 05_trade_management, and the adjustment playbook in 21_trade_adjustments.

---

1. Scenario & Thesis

It is mid-cycle in a moderately elevated volatility regime. A broad-market index ETF — call it XYZ, trading at $450 — has been chopping sideways for weeks. Implied volatility is high enough to make premium selling attractive but there is no clean directional read. This is the textbook setup for a market-neutral, defined-risk premium trade.

The thesis: XYZ stays roughly range-bound through the next ~45 days. We want to be paid for that range-bound view while knowing our worst case at entry — which is exactly what the iron condor delivers: a short put vertical plus a short call vertical, sold for a net credit, with long wings that cap the loss.

We choose the defined-risk condor over an undefined-risk strangle deliberately: this is sized for an account that wants a known, capped maximum loss and a modest, fixed buying-power footprint, accepting a smaller credit and lower probability of profit as the price of that cap.

---

2. Entry

We sell a symmetric, 10-point-wide iron condor at roughly 45 DTE with short strikes near the 1-standard-deviation (~16-delta) level on each side — the house default for short-premium strikes, where delta approximates the probability of finishing in-the-money. Entry at ~45 DTE is the canonical short-premium window that balances theta income against gamma risk.

We target collecting roughly one-third the width of the strikes in premium — the standard credit rule, which corresponds to a probability of success near 67%. On a 10-wide condor that is about $3.30.

Initial Greeks sit at the classic short-premium signature — flat delta, short gamma, long theta, short vega — but muted relative to a strangle because the long wings offset part of each Greek.

(Greek magnitudes are illustrative round numbers for a single 10-wide index-ETF condor.)

---

3. Timeline / What Happened

By Day 19 the trade has done what range-bound trades sometimes do: trended. Price has not breached the short put, but it is close, gamma is building as the cycle ages, and the position is no longer neutral — it is effectively long the market via a tested put spread. This is the decision point.

The untested side has done its job: the 480/490 call spread we sold for part of the credit has decayed to near zero. That is precisely the condition the strategy guides point to as the raw material for a defense roll — the profitable side has "decayed significantly and may have little remaining value."

---

4. Management Decisions

Decision 1 — Defend the untested side, not the tested side

The first principle, repeated across the canon: defend by adjusting the untested (winning) side. The strategy guides state it directly: "We manage iron condors by adjusting the untested side, or profitable side of the spread. We look to roll the untested spread closer to the stock price to collect more premium."

The logic of rolling the untested side toward price (rather than chasing the tested side) has been studied directly: a SPY iron-condor backtest sold short strikes at ~1 SD and, when the tested short was breached, rolled the untested spread inward (to roughly the new 0.30-delta strike) to collect additional credit — concluding this is the more defensible action than extending duration on the tested side.

Decision 2 — Execute the roll: 480/490 call spread → 465/475, for a credit

We roll the untested 10-wide call spread down from 480/490 to 465/475, keeping the width at 10 points. Because we are moving short premium closer to the money, the roll brings in an additional $1.40 of credit.

Collecting a net credit on the roll is the explicit goal: "A net credit collected with the roll from the old position to the new is one of the ideal goals when rolling an iron condor."

New position after the roll:

How the roll changes every key number:

This is the entire trade-off of the defined-risk untested-side roll, made explicit. The added $1.40 credit does two good things — it widens the downside (tested-side) breakeven from 416.70 to 415.30, buying ~1.4 points more room before the tested side loses money, and it lowers the capped maximum loss from $670 to $530. The cost is that the upside breakeven collapses from 483.30 to 469.70: if XYZ were to whip back up and rally hard, we now get hurt ~13.6 points sooner on the call side. We have re-centered the position around the current price and improved the downside, at the cost of upside room.

Decision 3 — Know the limit: how far the roll can go

The strategy guides are explicit that the untested-side roll has a hard stop: "We can go as far as rolling our untested spread to the same short strike as our tested spread, which creates an iron fly." Rolling our call short all the way to 420 would convert the condor into an iron butterfly — maximum extra credit, but the profit zone collapses to a point. We rolled to 465, partway, leaving a defined neutral-ish profit band rather than betting everything on a pin. This restraint is the heart of the defined-risk adjustment limit: because the wings already box in the risk, there is far less room to roll for meaningful credit than with a strangle, and the iron-fly conversion is the wall.

Decision 4 — The 21-DTE clock and the profit target both stay active

Two standing rules govern what happens next, and the roll does not switch them off:

The hierarchy is the standard management stack: take the untested leg off / roll it at ~50%, defend the challenged side when the short strike is threatened, and act by 21 DTE — whichever comes first.

---

5. Outcome (P/L)

The roll has re-centered the trade. Two representative resolutions follow — one where the thesis recovers and one where it does not — to show both the upside of disciplined defense and the floor that defined risk guarantees.

Outcome A — Win after defense (XYZ stabilizes, drifts to ~$440)

XYZ stops falling near $425, bases, and drifts back to $440 as the cycle winds down — comfortably inside the new profit zone of 415.30–469.70. Both spreads decay toward worthless. We do not hold to expiration; following the 50% rule we buy the whole condor back near $2.35 (50% of the $4.70 credit) at around 21 DTE.

The defense converted a trade that was drifting offside into a ~$235 winner — and, critically, did so by improving the downside breakeven at the moment of danger rather than by adding risk.

Outcome B — Capped loss (XYZ keeps falling, closes ~$405)

The trend continues. XYZ slices through the long put (410) and is trading $405 into expiration. The put spread (420/410) goes to its maximum value; the rolled call spread (465/475) expires worthless.

The loss is −$530 — the post-roll capped maximum, and not a penny more, no matter how far XYZ falls. Two things are worth seeing clearly:

1. *The roll made the worst case better, not worse. Without the defense, the capped loss was −$670; the +$1.40 of roll credit cut it to −$530*, a $140 improvement.

2. Defined risk did exactly what it promised. We knew −$670 (then −$530) at entry; we sized for it; the wings enforced it. A naked short put here would have kept losing past $405 with no floor.

---

6. Lessons

1. Defend the untested side — it is the only side with room. The whole defense rests on the profitable spread having decayed to near-zero, which lets you roll it toward price for a credit that both widens the tested-side breakeven and shrinks the cap. Chasing the tested side (rolling it out for duration) is the move the research found inferior.

2. A credit roll improves the worst case; it does not erase risk. The roll cut max loss from $670 to $530 and bought ~1.4 points of downside cushion — real, but modest. It is a nudge, not a rescue. Do not roll expecting to escape a losing trade; roll to improve your standing in it.

3. Every defense costs you somewhere — here, upside. Re-centering pulled the upside breakeven in from 483.30 to 469.70. If price whips back, you are hurt sooner. There is no free adjustment; you are trading one risk for another.

4. Defined risk has a hard adjustment wall: the iron fly. You can only roll the untested side as far as the tested short strike before the condor becomes an iron butterfly and the profit zone collapses to a point. Unlike a strangle — which you can keep rolling inward across cycles — the wings box you in. This is the core defined-risk adjustment limit: fewer escape hatches by design.

5. Sometimes the right move is to take the capped loss. Because the maximum is known and pre-funded, riding a defined-risk condor to its cap (or closing slightly inside it) is a legitimate, planned outcome — not a failure. The strategy guide explicitly frames closing through a breached short strike as limiting the loss to something at or below the maximum. Over-adjusting a defined-risk trade to dodge a loss you already budgeted for usually just adds new risk.

6. The clock and the target never switch off. The 50% profit target re-bases to the new credit, and the ~21-DTE time stop still forces action regardless of P/L. A defense roll buys you a better position, not a pass on the standing management rules.

---

Sources

Primary options-education — verified pages (fetched and quoted):

Primary — support center & research (real indexed URLs; episode pages 404 to automated fetching, results reported from search summaries and tagged Conf Med; no URL fabricated):

Cross-references: iron condor strategy · 05_trade_management · 08_defined_risk · 21_trade_adjustments · 25_common_mistakes · 02_probability · 03_implied_volatility

Sourcing note: the five options-education `/learn/` and `/concepts-strategies/` pages above were directly fetched and the untested-side roll, 50%-management, breakeven, 1/3-width/~67%-POP, and iron-fly-limit statements verified verbatim from page text. The research-study episode URLs are real, search-indexed pages whose quantitative results are reported from search summaries (the episode pages return 404 to automated fetching) and are tagged Conf Med accordingly. All P/L, Greek, strike, and credit figures in this case study are illustrative round numbers, internally consistent with the cited formulas, and are not the output of any backtest. No URL in this document is fabricated.

_Evidence-labeled per the Project Charter. Education only, not financial advice._