Double Calendar

A double calendar provides a wider profit zone - you profit if the underlying pins to either strike, not just one. It's more forgiving if you're uncertain exactly where the underlying will settle within a range. The trade-off is higher cost (two calendars instead of one).

For indices like FTSE 100 (cash-settled), either call or put calendars work similarly. A 'mixed' approach (put calendar at lower strike, call calendar at upper strike) means both short options are OTM, reducing assignment risk. Start with all calls or all puts for simplicity.

The 'valley' between strikes typically still generates some profit, though less than if the underlying were at either strike. Both calendars contribute partial theta, and you still benefit from any IV increase. It's not the best outcome but usually not a losing scenario.

You need the combined net debit of both calendars. For example, if each calendar costs £50, you need £100 total. This is your maximum loss. Position sizing suggests this should be 3-5% of your account.

No, the maximum loss is limited to the combined net debit paid for both calendars. This occurs if the underlying moves far from both strikes, making all options lose their time value differential.

Place strikes at technical support and resistance levels where you expect the range to hold. The lower strike goes at support (where you expect buying interest), the upper strike at resistance (where you expect selling pressure). The current price should be roughly centered.

Roll both if underlying is centered and you expect the range to continue. Roll only one if underlying is at one strike (take profit on that calendar) and the other needs more time. Close both if thesis is broken or you're satisfied with profit.

Both are neutral strategies but differ in vega. Double calendars have positive vega (benefit from IV increase) - use in low IV. Iron condors have negative vega (benefit from IV decrease) - use in high IV. Double calendars cost debit; iron condors receive credit.

An IV spike benefits your double calendar (positive vega). Consider taking profit if the IV spike is large enough to generate significant gains, especially if you're uncertain whether IV will stay elevated. Don't be greedy - vega profits can disappear quickly if IV reverses.

Yes. You can close one calendar and keep the other (single calendar). You can close the shorts and hold the longs (two long options). You can roll to different strikes. Flexibility is one of the advantages of the structure.

A mixed double calendar (put at lower, call at upper) already exploits put skew by selling OTM puts, which have elevated IV. To further optimize, check the skew differential and potentially adjust strike placement to maximize the IV you collect on the put side.

As underlying moves, close the calendar that's becoming a loser and add a new one in the direction of movement. If underlying rallies, close lower calendar (likely losing), add new calendar above current upper. Maintain two calendars centered around current price.

Track total delta, theta, and especially vega across all positions. Set budgets for each Greek. For vega, balance with negative vega positions if exposure becomes too large. Use scenario analysis to stress-test for ±5% IV moves and significant underlying moves.

Use triple or ladder calendars when the expected range is wide and a two-strike structure doesn't adequately cover it. Also useful when you want multiple 'capture points' as underlying oscillates. The cost is higher but probability of at least partial profit improves.

Enter 1-2 days after earnings when IV has crushed. Place strikes at the new expected range based on post-earnings price action. You benefit from low IV entry (vega upside) and the underlying typically stabilizes in a new range after the gap move settles.