Diagonal Call Write: LEAPS Ownership With a Higher Strike Sold Monthly
You want covered call income with more upside room than a poor man's covered call gives you. A diagonal call write buys a long-dated call at one strike and sells a shorter-dated call at a meaningfully higher strike, repeating the short sale every cycle.
- Exactly what you buy (a long-dated call) and sell (shorter-dated calls at a higher strike, repeated)
- The payoff: more room for stock appreciation than a poor man's covered call, less premium per cycle
- Your numbers: strike gap, monthly premium, total capped profit
- When a diagonal call write fits and how the wider strike gap changes the trade
A diagonal call write is a poor man's covered call with the strikes pulled apart. Instead of selling a short call close to your long call's strike, you sell it meaningfully higher, giving the stock more room to run before your gains are capped. The tradeoff: a wider gap between strikes means the short call you sell is further out-of-the-money, so it pays you a smaller premium each cycle.
What You Actually Do
Apple trades at $200. You buy one 1-year $180 call for $28 a share, $2,800, well in-the-money to behave like a stock substitute. Instead of selling a $200 short call like a standard poor man's covered call, you sell one 1-month $220 call for $1.50 a share, $150, meaningfully higher.
Your net cost: $2,800 minus $150 = $2,650 after the first month's premium. Because the gap between $180 and $220 is $40 wide, the stock has $40 of room to rise before your position's upside is capped, compared to a tighter poor man's covered call where the cap might sit just $10-20 above the long call.
The Payoff, Drawn
Drag the slider to see how you do at different ending prices for Apple (at the short call's expiration).
The shape tracks the long call's intrinsic value up to $220, then flattens as the short call caps further gains. Compared to a tighter poor man's covered call, the flattening happens much further to the right, giving the trade more room to capture stock appreciation before the ceiling kicks in.
The Trade-Off: Room to Run vs. Monthly Premium
A diagonal call write is a dial you can turn.
Pull the short strike close to your long strike, and you collect fat monthly premium but cap your upside almost immediately, closer to a standard poor man's covered call. Push the short strike far away, and you collect thinner premium each month but give the stock much more room to appreciate before the ceiling matters. The name "diagonal" describes the structure (different strikes and different expirations), and how far apart you set those strikes is the single biggest lever you control.
The math: a wider gap trades monthly income for capital appreciation potential. Neither choice is wrong; it depends on whether you are optimizing for steady premium or for participating more in a potential rally.
When a Diagonal Call Write Fits
- You want covered call income at a fraction of stock cost
- You want more room for appreciation before the cap
- You are comfortable with a smaller monthly premium
- You want the maximum monthly income right away
- You expect the stock to stay flat (a tighter strike pays more)
- You would rather have a fatter premium than more room to run
A diagonal call write is for the trader who wants covered call income but also wants meaningful room for the stock to appreciate before being capped. It is not for traders purely optimizing for the biggest possible monthly premium.
A Worked Example
Walk through three scenarios: you paid $2,800 for the long call, collected $150 the first month.
Apple stays at $200. The short $220 call expires worthless. You keep the $150 premium and sell a new short call for next month. The long call still holds substantial intrinsic value ($20 ITM, worth roughly $2,200+).
Apple rallies to $215. Still below your $220 short strike. The short call expires worthless again, you keep the $150, and your long call has appreciated nicely, now $35 ITM. You captured almost the entire rally.
Apple soars to $240. The short call is $20 ITM and likely assigned or bought back at a loss on that leg, but your long call is $60 ITM, capturing the bulk of the move. Net: strong profit, though capped somewhat by the short call obligation at $220.
That is the diagonal call write: covered call income at low capital, with meaningfully more room for the stock to run before the cap bites.
- A diagonal call write is buying a long-dated call and selling shorter calls at a meaningfully higher strike, repeated monthly.
- Wider strike gap than a poor man's covered call: less monthly premium, more room for stock appreciation.
- Max loss is the long call's cost minus premiums collected; the long call is your capital-efficient stock substitute.
- It fits capital-constrained traders who want more upside participation than a tight covered call structure allows.
Pop Quiz
Two quick checks. Pick an answer and the explanation shows up right away.
How does a diagonal call write differ from a poor man's covered call?
Both buy a long-dated call and sell against it. A diagonal call write simply sets the short strike further away, trading smaller premium for more upside room.
What is the main cost of choosing a wider strike gap in a diagonal call write?
A short call further from the money is cheaper to sell, meaning you collect less premium each cycle in exchange for the stock having more room to appreciate before the cap.
Bottom Line
A diagonal call write is the poor man's covered call with its dial turned toward capital appreciation instead of maximum monthly income. By selling the short call meaningfully above the long call's strike, you give the stock more room to run before your gains are capped, at the cost of a smaller premium each cycle. Reach for it when you want covered call income but also want real participation in a potential rally. Avoid it when your priority is squeezing out the fattest possible monthly premium.