Diagonal Put Spread: Long-Term Downside with Monthly Roll Income
You want long-term stock downside but also monthly income. A diagonal put spread lets you buy a long-dated put and sell near-term puts at a lower strike. You collect income every month and hold the long put for years. It is the LEAPS put with a monthly income engine.
- Exactly what you buy and sell: different strikes, different expirations
- The payoff: years of downside, capped below the short strike, monthly rolling income
- Your numbers: net cost, monthly rolls, break-even
- When a diagonal put spread is the right income+downside play, and when to roll or close
A diagonal put spread is a LEAPS put with a monthly income engine. You buy a long-dated put to own years of downside, then sell near-term puts at a lower strike to collect income every month. As the short puts expire, you sell new ones and pocket the credit. The long put stays alive for 1 to 3 years, giving you years to be right on direction while collecting premium along the way.
What You Actually Do
Apple trades at $200. You believe it will be lower in three years, but you want monthly income to offset the cost. You buy one 3-year $200 put for $12 a share, $1,200. Immediately, you sell one 1-month $190 put for $2 a share, $200.
Your net cost: $1,200 minus $200 = $1,000 debit. That is your risk. Next month, the 1-month $190 put expires and you sell another 1-month $190 put for $2, pocketing $200 again. You repeat this every month for three years. If you collect $200 a month, that is $2,400 in a year, $7,200 over three years, which more than pays for the $1,000 net cost and gives you a profit of $6,200 just from rolling, plus any stock depreciation below the $190 cap.
The Payoff, Drawn
Drag the slider to see how you do at different ending prices for Apple (at near-term expiration, one month from now).
The shape is a put spread leaning bearish. Above $200, you lose money but keep the short put's credit. Between $200 and $190, the short put loses value and you keep the full credit while the long put gains. Below $190, the short put caps you, but the long put (now 2-months-and-3-weeks, expiring later) still has value and is worth more than the short, so you keep a profit. The key: every month you sell a new short put and collect $200 again, moving the cap higher or lower depending on your outlook.
The Income Engine: Rolling for Three Years
A diagonal put spread is a LEAPS put that pays for itself.
In a naked LEAPS put, you pay $1,200 upfront and bleed theta for three years. In a diagonal, you pay $1,000 and immediately start collecting $200 a month. Year one, you collect $2,400. By year two, you have collected $4,800 and your initial $1,000 cost is long gone. You are playing with the market's money. The long put is still alive with two years to run, so if Apple falls from $200 to $180 in year two, the long put is worth $2,000+ and the short put caps you at $190, but you have collected $4,800 in premium plus the stock depreciation down to $190, which is more than you would have made on a naked LEAPS alone.
The catch: you give up unlimited downside below the short strike. You are trading cap-less downside for monthly income and lower net cost.
When a Diagonal Put Spread Fits
- You want long-term downside (1-3 years) but need to offset cost
- You can roll every month consistently and have discipline
- You are willing to cap downside at the short strike for monthly income
- You expect a huge move past the cap and want unlimited downside
- IV is low and near-term premiums are thin
- You cannot commit to rolling every month without fail
A diagonal is for the disciplined, long-term trader who wants downside but also wants to collect income monthly and reduce net cost. It is not for the trader who expects a huge move past the cap or who cannot manage rolls.
A Worked Example
Walk three months through the diagonal: you paid $1,000 net ($1,200 long put, $200 short put credit).
Month 1: Apple stays at $200. The 1-month $190 put expires worthless. You collect the full $200 credit and keep it. The 3-year put is now worth about $11 (it is ATM and has nearly 3 years left). Your long put gained $100 in value. You collect $200 credit, realize $100 from the long put's stability offset, for a net profit of about $200 month one. Your cumulative cost is now $800 ($1,000 minus $200).
Month 2: Apple falls to $185. The 1-month $190 put is $5 in the money, worth about $500. You close it for $500 loss (you sold it for $200, now it costs $500). But the 3-year $200 put is now worth about $2,000 (it is $15 ITM and has nearly 3 years left). You sell a new 1-month $190 put for $3 (now $185, the put is closer to the strike, so it is worth more). You collect $300 credit. Your spread at expiration is worth $2,000 (long put) minus $300 (new short put) = $1,700. You paid $1,000, so you are up $700. Month two profit: about $300 (the new credit plus intrinsic gain on the long put).
Month 3: Apple crashes to $175. The 1-month $190 put is $15 in the money, worth $1,500. You close it for a $1,300 loss (sold for $200, closed for $1,500). The 3-year $200 put is worth $2,800 (it is $25 ITM). You sell another 1-month $190 put for $4 (close to strike). You collect $400. Your new spread is worth $2,800 minus $400 = $2,400. You have collected $200 + $300 + $400 = $900 in rolling credit over three months. Your long put has gained $1,800 from $200 to $2,000 intrinsic value. Total profit: $900 + $1,800 minus $1,000 cost = $1,700 over three months. If you annualize that, you are making $6,800 a year on a $1,000 investment, or 680% return if the stock keeps drifting down.
That is the diagonal put spread over three months: the monthly rolls pay for the initial cost and the long put captures the stock move, creating a compounding income machine.
- A diagonal put spread is buying a long-dated put and selling near-term puts at a lower strike: years of downside with monthly income.
- Max profit is capped at the short strike (unless you close the long put early), but rolling every month compounds income.
- Monthly rolls pay for the initial net debit and create ongoing premium collection.
- It fits long-term bearish traders who can commit to monthly management and are willing to trade unlimited downside for monthly income.
Pop Quiz
Two quick checks. Pick an answer and the explanation shows up right away.
You buy a 3-year $200 put for $12 and sell a 1-month $190 put for $2. What is your net cost?
You pay $1,200 for the long 3-year put and collect $200 for the short 1-month put, so your net cost is $1,000 debit. That is your initial risk.
Next month, you close the 1-month $190 put and sell a new 1-month $190 put. If you collect $200 a month for 12 months, how much total credit do you collect?
If you collect $200 every month for 12 months, that is $200 × 12 = $2,400 in rolling credit. Your net cost was $1,000, so you have already profited $1,400 just from rolling, before any stock depreciation.
Bottom Line
A diagonal put spread is the sophisticated version of the LEAPS put. You own years of downside but pay less upfront and collect monthly income that compounds over time. The short put caps your downside, but the rolling income often exceeds what you would make on a naked LEAPS anyway. Master the diagonal and you have a self-financing, long-term wealth-building machine that turns options selling into stock protection. Reach for it when you want bearish conviction for years but also want the market to pay you every month for the privilege of holding that conviction.