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2014issue C0216-21

A static iron condor is a market-regime overlay, not an expected-value filter

A short iron condor is a same-expiry pair of out-of-the-money credit spreads sold as a weeks-to-months book. Editorial reading: unused-wing odds from low absolute delta are not a substitute for an expected-value filter.

  • A short iron condor is two same-expiry out-of-the-money credit spreads on one underlying, one below spot and one above.
  • A systematic option-income procedure sells those wings under fixed entry, exit, and adjustment rules and treats short-leg absolute delta below 0.10 as at least a 90 percent chance the wing expires unused.
  • Absolute delta is not the implied probability of expiring in the money, and path risk before an early close can be mis-stated when returns are fat-tailed and both strikes are short.
  • About half of listed options expire out of the money, so a high unused-option rate does not decide the book; expected value does, and a farther resale after a buyback is a crystallized stop.
Entries in this reading3 entries
Current trackIron condor17 readingsExpected value61 readingsOption income strategy85 readings

Two credit spreads on one expiry

A short iron condor is two same-expiry credit spreads on one underlying: out-of-the-money puts struck below spot and out-of-the-money calls struck above spot. In the iron-condor sense used here, that pair places a single premium sale inside a two-sided market-regime book.

The systematic version sells those wings far enough out of the money, often on an index, under fixed global entry and exit rules that claim to remove any need to forecast direction.

An always-on income procedure

An option-income-strategy in this archive is a fixed, always-on premium-collection procedure with preset entry, exit, and adjustment rules and no forecast of direction or volatility. Strike choice treats absolute delta as a stand-in for the chance a spread expires in the money. Short legs are commonly required to sit below 0.10 absolute delta, framed as at least a 90 percent chance of expiring unused.

The book is typically opened one or two months before expiry and often closed one or two weeks early. A wing is treated as endangered when its absolute delta rises past a threshold near 0.30, prompting a buyback and a new farther spread.

Delta is not the unused-wing chance

Under standard pricing assumptions, absolute delta is not the implied probability that an option expires in the money, even though the two quantities move together and stay close for deep in-the-money, far out-of-the-money, and at-the-money options.

If the position is adjusted or closed before expiry week, the relevant risk is the chance a short strike is touched before that window. That path probability is one that low absolute delta can mis-state, especially with fat-tailed returns and two short strikes.

Path risk and a crystallized repair

Slippage, commissions, and widening bid-ask spreads make live repair of a threatened credit spread hard. Option stops do not behave like stock stops when out-of-the-money prices gap.

Sharing margin across both wings raises two-way break risk. Buying back a threatened vertical then reselling a farther one is a stop-loss that has already crystallized, not a costless repair of the original edge.

Expected value, not hit rate

A fully static two-sided sale is a standing bet that sold options stay expensive and bought options stay cheap, using only option-market quotes and no view on the underlying’s direction or volatility.

About half of listed options expire out of the money, so a high unused-option rate does not decide the procedure. Long-run results follow expected value, and a constant both-sides premium sale is argued to carry negative expected value. Expected value here is a size-weighted check of wins against losses used before entry, and after any repair, so a high hit rate cannot pass for a bounded risk rule.

Educational research material, not investment advice. Historical source context does not establish present-day performance.
11 of 15 in the Iron condor track
201422-26 pp.Next on Iron condorWeekly option income adjustments with iron condors and butterfliesA weekly iron butterfly entered Thursday or Monday and preferred a four-day hold after realized volatility in the underlying rose.
All readings on this track · 15 readings
  1. 2003Implied volatility regimes and range-condor context
  2. 2007Rewriting calendars and iron condors when volatility regimes shift
  3. 2008Option spreads, mental stops, and volatility regimes
  4. 2010Index condor overlays and delta repair
  5. 2010Equal and unequal strike geometry in a four-leg credit book
  6. 2010Sizing reserves for condors and pair layers
  7. 2012Iron condor adjustments when a favorite index breaks
  8. 2013Earnings-week implied volatility crush and iron condor wings
  9. 2013Iron condors, butterflies, and stops as one risk budget
  10. 2014Friday expiry as a weekly butterfly and iron-condor laboratory
  11. 2014A static iron condor is a market-regime overlay, not an expected-value filter
  12. 2014Weekly option income adjustments with iron condors and butterflies
  13. 2014Inverted iron-condor payoffs and misplaced reversal candles
  14. 2017Patient short-volatility income as a written procedure
  15. 2020A short iron condor is a weeks-to-months range-regime statement
By fieldOptions and volatility435 readingsBy year2014163 readings
All 17 readings tagged Iron condor
Also on Iron condor5 readings
2010Iron condor income in a sideways regime2010Equal and unequal strike geometry in a four-leg credit book2012Iron condor adjustments when a favorite index breaks2014Inverted iron-condor payoffs and misplaced reversal candles2014Weekly option income adjustments with iron condors and butterflies