Index condor overlays and delta repair

The case study opened high-probability and low-probability index iron condors, overlaid them with at-the-money butterflies and calendars, and used short-strike deltas and early-position velocity to decide how to repair, stand aside, or consider reentry.

An iron condor is a four-leg short-premium structure that pairs a put credit spread with a call credit spread so defined-risk wings can collect time decay. Short-strike delta is the delta of a sold wing, used as a thermometer for how close the market has come to the threatened side.

Two constructions, two planned lives

High-probability iron condors were opened near 50 days to expiration with short-strike deltas of 10 or less, commonly 7 to 10. Low-probability condors were opened near 30 days with short-strike deltas of 14 to 18.

The high-probability and low-probability labels were used only to separate those two constructions by strike distance and planned life. A high-probability condor used farther short strikes, a smaller credit, and a longer planned life. A low-probability condor used closer short strikes, a larger credit, and a shorter planned life.

Overlays that add theta and offset vega

Condors were typically overlaid with at-the-money butterflies and calendars at a combined 20 percent to 30 percent ratio so extra theta could be added while vega risk was reduced. Theta is net sensitivity to the passage of time. Vega is net sensitivity to implied volatility.

An at-the-money butterfly was treated as positive theta and negative vega. An at-the-money calendar was treated as positive theta and positive vega. Holding both raised decay while offsetting volatility exposure. The overlay was sized as a fraction of the condor book and changed net theta and vega without replacing the condor itself.

One order and a shorter working window

Four-leg condors were submitted as one order. The case accepted about 0.10 to 0.15 away from midpoints so later risk management, not entry pennies, carried the process.

Planned market exposure was about nine days, with roughly 10 days cited as a typical working target. That window was shorter than the 12-to-14-day or 30-to-49-day windows associated with the two condor styles.

When to repair deltas, and how far

Adjustment was triggered when low-probability short-strike deltas reached 30 or high-probability short-strike deltas reached 20. The case did not chase full delta neutrality and usually only cut net deltas by about one-half to two-thirds.

When the index drifted higher in a controlled way and the book was short deltas, long-delta repair used out-of-the-money put credit spreads, long calls, or covering some short call spreads. The reverse toolkit applied on a controlled decline. Delta repair here means rule-based changes to net directional exposure when short-strike deltas or market velocity breach preset limits, without forcing a zero-delta book.

Velocity, stand-aside, and reentry

If early-position velocity was strong, the overlay butterfly was closed at its breakevens along with the threatened short credit spreads. The case then waited 24 to 48 hours to see whether the index could stay inside a one-standard-deviation daily range for one to two days before considering reentry.

Location bias and overlay size

Near resistance the book was biased modestly short delta. Near support it was biased modestly long delta. Between those levels the sale was kept closer to delta-neutral. Overlay size rose when the index was calmer and was cut to about one-third when conditions were judged high risk.