Double Calendar Spread for Earnings

Summary

A double calendar spread sells front-month options (the earnings week expiration) and buys back-month options (2-4 weeks after earnings). You profit when IV crushes in the front month while the back-month options retain most of their value. It is more forgiving than an iron condor on large moves but captures less premium on small moves.

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How It Works

The double calendar has four legs:

  • Sell 1 OTM call (earnings week expiration)
  • Buy 1 OTM call (3-4 weeks later expiration)
  • Sell 1 OTM put (earnings week expiration)
  • Buy 1 OTM put (3-4 weeks later expiration)

    • You are short front-month options and long back-month options. When IV crushes after earnings, the front-month options lose value faster than the back-month options.

    Why It Works Around Earnings

    IV term structure. Before earnings, the front-month IV is much higher than the back-month IV. The weekly options expiring the day after earnings might have 55% IV, while the monthly options expiring 30 days later have 35% IV.

    After earnings, the front-month IV crushes to 25% while the back-month IV drops to 30%. The front-month dropped 30 points, the back-month dropped only 5 points. Your short options lost way more value than your long options.

    The differential is your profit.

    Setup Example on GOOGL

    GOOGL at $175, reporting after the close on Tuesday.

    Front-month (Friday expiration, 3 DTE):

  • Sell $183 call at $1.80 (IV: 48%)
  • Sell $167 put at $1.60 (IV: 52%)

    • Back-month (monthly expiration, 24 DTE):

  • Buy $183 call at $3.80 (IV: 34%)
  • Buy $167 put at $3.20 (IV: 36%)

    • Net debit: ($3.80 + $3.20) - ($1.80 + $1.60) = $3.60

    This is your maximum risk if the stock moves dramatically in either direction.

    Profit Scenarios

    Scenario A: GOOGL stays in range ($170-$180)

    Front-month options expire nearly worthless (total value: ~$0.20). Back-month options retain most of their value (total value: ~$5.50 from time value and moderate IV).

    Value of position: $5.50 - $0.20 = $5.30 Profit: $5.30 - $3.60 = $1.70 per share (47% return)

    Scenario B: GOOGL moves to $184 (right at the call strike)

    Front-month call: worth ~$1.20 (ATM, crushed IV). Front-month put: worth $0.05. Back-month call: worth ~$4.50 (ATM, moderate IV). Back-month put: worth $1.00.

    Value: ($4.50 + $1.00) - ($1.20 + $0.05) = $4.25 Profit: $4.25 - $3.60 = $0.65 (18% return)

    Scenario C: GOOGL gaps to $195 (+11.4%)

    Front-month call: worth ~$12.00 (deep ITM). Front-month put: worth $0.01. Back-month call: worth ~$14.00. Back-month put: worth $0.30.

    Value: ($14.00 + $0.30) - ($12.00 + $0.01) = $2.29 Loss: $2.29 - $3.60 = -$1.31 (-36%)

    On a massive move, the back-month options do not gain enough to offset the front-month losses. But the loss is capped and much smaller than the move suggests.

    Double Calendar vs Iron Condor

    | Metric | Double Calendar | Iron Condor | Max profit zoneNear the short strikesBetween short strikes Max lossNet debit paidSpread width minus credit Profit on small moveHigherHigher Loss on huge gapModerate (debit)Can be full spread width ComplexityHigher (4 expirations)Lower | Margin requirement | Lower | Standard |

    Choose double calendar when:

  • You are concerned about a gap beyond the expected move
  • You want a more forgiving risk curve on large moves
  • You are comfortable managing multi-expiration positions

    • Choose iron condor when:

  • You want simplicity
  • The stock historically stays within the expected move
  • You want a single expiration to manage

    • Managing After Earnings

    If the stock stays in range: Close the front-month options for a few cents and hold the back-month options. You now own a strangle at a significant discount. You can sell more premium against it the following week.

    If the stock is near a short strike: Close the entire position. The front-month option at the short strike will have significant value, but the back-month option at the same strike will have even more. Lock in whatever profit or small loss exists.

    If the stock gaps well past a strike: Close immediately. The position will show a loss, but it is limited to the debit paid. Do not try to salvage by holding the back-month options — the directional risk is unhedged once the front-month options are deep ITM.

    Key Risks

    IV across both months drops equally. If the back-month IV also crushes (happens in severe market selloffs), the position loses more than expected because your long options lose value too.

    The stock moves exactly to your short strike. This is where gamma risk is highest. The front-month option has high gamma near expiration, making the delta swing wildly. Close before Friday's close if the stock is near a short strike.

    OptionsPilot's backtester supports calendar spread simulations, letting you compare double calendars to iron condors across historical earnings events.