Long Call Condor Strike Selection: How to Pick the Body Width

On July 23, 2026, three long call condor trades were entered: XSP 690/700/810/820 with a 110-point body, QQQ 700/715/845/860 with a 130-point body, and QQQ 715/725/810/820 with an 85-point body. Three different body widths on the same trading day. Why?

The body width determines how forgiving the trade is to the underlying's actual movement. A 130-point body can absorb a 12% move in either direction and still profit; an 85-point body demands the underlying stay within an 8% corridor. Wider bodies collect more time premium but tie up more capital; narrower bodies are more capital-efficient but require tighter directional accuracy.

This page walks through the decision tree that determines body width. The framework is rule-based and applies to any long call condor entry on SPX, XSP, QQQ, or SPY.

The Four Inputs

Body width selection depends on four measurable inputs at the time of entry:

1. Underlying spot vs. range zone. Where is the underlying relative to its 30-day trading range?
2. Implied volatility skew across the body. How steep is the IV gradient from the lower body strike to the upper body strike?
3. Days to expiration (DTE). How long until the structure expires?
4. Earnings / event proximity. Are there single-session tail-risk events within the next 30 days?

Each input maps to a body-width choice through a simple rule. The four rules together determine the strike geometry.

Input 1: Spot vs. 30-Day Range

The underlying's spot relative to its 30-day high-low range determines how much directional buffer the trade needs:

For QQQ on July 23, 2026: spot was $692.18 with a 30-day range of approximately $660-$720 (10% corridor, midpoint $690). The spot was at the 30-day midpoint, so standard body widths applied.

For SPX: spot was $7,150-ish (per the XSP trade context) with a 30-day range of roughly $6,950-$7,300 (5% corridor). Spot was below midpoint, which contributed to the XSP trade using a 110-point body rather than the QQQ's 130 — narrower body tolerance because the index was already at the lower end of its range and a wider body would have left the trade sitting at max loss.

Input 2: IV Skew Across the Body

The IV gradient from the lower body strike to the upper body strike determines how much premium can be collected at the body floor (where theta is highest) versus how much must be paid at the body ceiling (where theta is lowest).

Wider skew = more premium to harvest at the body floor = wider body is justified (more strikes to spread the premium across).

Narrower skew = premium is balanced across the body = narrower body is more capital-efficient.

The threshold rule from the playbook:

• Skew > 400 bp (IV at lower body − IV at upper body > 4%): Body width can be 120-150 pt. The skew compression alpha is large enough to justify tying up the wider-body capital.
• Skew 200-400 bp: Body width 80-120 pt. Standard sizing.
• Skew < 200 bp: Body width 50-80 pt. The skew compression alpha is small; the trade should be sized conservatively.

For QQQ on July 23: the 715C/725C IV was 26.2/25.7%, and the 810C/820C IV was 22.2/22.0%. That's a 350 bp skew for the narrow body trade and 470 bp for the wider body trade. Both fell in the "standard sizing" 200-400 bp bucket, but the wider QQQ-Dec trade used a 130-pt body because the underlying had a wider 30-day range at that point in time (closer to 13% corridor vs the 10% on the narrow trade's entry).

For XSP: 850 bp skew on the XSP trade (23.6/22.7 vs 14.2/13.9). That's in the "wider body justified" bucket. The 110-pt body on the XSP trade was consistent with the skew input.

Input 3: Days to Expiration

DTE controls how much time premium the trade has to harvest and how much the position will pay in extrinsic decay on the long wings.

• 60-90 DTE: Body width 50-100 pt. The trade needs to resolve quickly because theta decay accelerates past 30 DTE. Wider bodies can't collect enough premium to justify the capital.
• 90-150 DTE: Body width 100-150 pt. Standard window for the playbook's range trades.
• 150-200 DTE: Body width 120-200 pt. Long-dated structures can afford wider bodies because there's more time for the trade to work.
• Beyond 200 DTE: Body width 150-300 pt. The structure starts to look like a calendar-spread cousin rather than a pure range-bound trade. Not used in the current playbook.

The three July 23 trades had 148 DTE (XSP, QQQ-Dec) and 120 DTE (QQQ-Nov-narrow). All fell in the 90-150 DTE window, consistent with body widths of 85-130 pt.

Input 4: Earnings / Event Proximity

Single-session tail-risk events break the range thesis. The body width should be tightened as an event approaches, even if the other inputs would suggest a wider body.

The rule:

• No major event within 60 days: Standard body width as determined by inputs 1-3.
• Major event within 30-60 days (FOMC, CPI, mega-cap earnings): Tighten body width by 20-30 pt. Wings get more expensive as the event approaches; a tighter body means less premium is tied up in the structure.
• Major event within 14 days: Skip the trade or shift to a single-vertical. The wings can't protect against a binary event.

For QQQ on July 23: FOMC was July 30 (7 days out), NVDA earnings were late August, AAPL/MSFT/GOOG were late July through early August. The narrow QQQ-Nov trade was sized tighter (85-pt body) precisely because of this event cluster. The wider QQQ-Dec and XSP trades were sized with wider bodies because the events had passed before their expiry (Nov 20 and Dec 18 respectively).

Putting It Together: The Three July 23 Trades

For each trade, here's how the four inputs mapped to the body-width decision:

XSP 690/700/810/820 (110-pt body)

QQQ 700/715/845/860 (130-pt body)

QQQ 715/725/810/820 narrow (85-pt body)

The three trades represent three different body-width choices driven by three different combinations of the four inputs. None of them is the "default" body width; each is a calibrated response to the conditions at entry.

Common Mistakes

Mistake 1: Picking body width based on max profit alone. A wider body looks more attractive because the max profit is larger in dollar terms (130-pt body = $810 max profit vs 85-pt body = $645 max profit). But the wider body also requires a wider range to be achieved — which means a lower probability of profit. The correct metric is expected profit, not max profit: max profit × probability of being in the body zone. Probability of being in the body declines faster than max profit grows, so wider bodies are less capital-efficient per unit of expected profit above a certain width.

Mistake 2: Using the same body width on every trade. If the playbook ran every trade with a 130-pt body, it would over-size trades in tight-range regimes (where the trade sits at max loss while waiting for a move that never comes) and under-size trades in volatile regimes (where the body is exceeded before theta can do meaningful work). Body width must be calibrated to the regime.

Mistake 3: Ignoring the skew-vs-body relationship. The trade's alpha source is skew compression. A wider body collects more premium at the body floor (where theta is highest and IV is highest) and pays more premium at the body ceiling (where theta is lowest and IV is lowest). But the wider body also requires a wider range for the skew thesis to play out — and if the range tightens before expiry, the wings tie up capital in strikes that never become ITM.

Mistake 4: Skipping input 4 (event proximity). Earnings and FOMC events break the range thesis. A 130-pt body on a trade entered 7 days before FOMC is asking for a tail event to blow through the wings. The 20-30 pt tightening for event proximity is non-negotiable.

Mistake 5: Optimizing body width to past data. Body width selection uses inputs at the time of entry, not backtested optimal widths from prior trades. A 110-pt body worked on a similar XSP trade in March doesn't mean 110 pt is the right body for the current trade. The four inputs change daily; the body width must be recomputed for each entry.

Worked Example

Suppose QQQ is at $700, the 30-day range is $680-$720, the IV skew across the body is 380 bp, the trade has 100 DTE, and FOMC is 25 days out. What's the body width?

• Input 1 (spot vs. range): $700 is at the upper end of the $680-$720 range. Slight directional-bias-down expected → tighten body by 10-15 pt.
• Input 2 (skew): 380 bp → standard sizing 80-120 pt.
• Input 3 (DTE): 100 → standard 100-150 pt.
• Input 4 (event): FOMC 25 days → tighten by 20-30 pt.

Combine: standard 100 pt, tightened by 10-15 (input 1) + 20-30 (input 4) = 65-75 pt body.

In contrast, QQQ at $700 with a 30-day range of $660-$720 (wider range, spot at midpoint), IV skew 450 bp, 150 DTE, no events within 60 days:

• Input 1: midpoint → standard.
• Input 2: 450 bp → wider body justified (120-150 pt).
• Input 3: 150 → standard 100-150 pt.
• Input 4: no events → no tightening.

Combine: 130-150 pt body, possibly wider if the skew is significantly above 400 bp.

See Also

• Long Call Condor strategy page — the structure itself
• Trade-log entries — live and closed positions
• Playbook SOP — sizing and management rules
• Education index — risk vs reward, probabilities, math errors
• Options math errors — common formula mistakes including the wing-width max profit derivation

The framework here is the playbook's standard body-width selection. It applies to any long call condor on SPX, XSP, QQQ, or SPY with 60-200 DTE. Outside that window, the structure starts to look like a different trade (calendar, LEAP, etc.) and the body-width rules change.