Trade Overview
This week I entered my standard 30ฮ double calendar on Wednesday using the 15 DTE / 30 DTE structure.
- Underlying: SPX
- Price at Entry: 6902.84
- VIX at Entry: 20.29
- Structure: 15 DTE shorts / 30 DTE longs
- Strike Selection: ~30ฮ on both sides
Term Structure at Entry
- Front Month IV (15 DTE): 19.3%
- Back Month IV (30 DTE): 20.5%
- Curve Condition: Contango
- Interpretation: Back-month IV exceeds front-month IV, reflecting stable term structure without front-loaded stress.
Trade Construction
Short Legs (15 DTE)
- Short Put: 6775 โ 2026-03-05
- Short Call: 7010 โ 2026-03-05
Long Legs (30 DTE)
- Long Put: 6775 โ 2026-03-20
- Long Call: 7010 โ 2026-03-20
- Total Debit Paid: 68.65
- Buying Power Used: 6,865
Execution Screenshot
Risk Profile at Entry
- Max Profit (theoretical): Occurs if price pins near either short strike with favorable term structure behavior
- Max Loss (theoretical): 68.65 (debit paid)
- Breakeven Range: Between 6775 and 7010
- Width Between Shorts: 235 points
- Implied Volatility: 19.3% / 20.5%
This creates a balanced volatility structure with defined risk on both tails.
Structural Assessment
Volatility Context
- Pre-entry volatility behavior: Stable within operating band
- Term structure posture: Mild contango
- Volatility tailwind or headwind: Neutral to modest tailwind if expansion occurs
Price Context
- Distance to short put (%): 1.85%
- Distance to short call (%): 1.55%
- Current market tone: Range
Greek Posture at Entry
- Net Delta: Near-neutral
- Net Vega: Net long
- Net Theta: Positive
- Gamma Risk Profile: Moderate at entry, increases as front expiration approaches
The objective is to capture mid-cycle theta while maintaining controlled gamma exposure.
Trade Plan
- Take Profit: 10% of debit
- Stop Loss: 25% of debit
- Maximum Hold: 13 calendar days
- Exit Style: Mechanical, not discretionary
I will not hold into late-cycle gamma acceleration.
Expected Behavior
This trade performs best if:
- Price remains contained within the short strikes
- Volatility stabilizes or expands moderately
- Movement is controlled rather than explosive
It underperforms during fast directional expansion or volatility collapse.
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