Put Calendar: Collect Income While Waiting for a Downside Move
You expect the stock to drift downside slowly. A put calendar lets you sell short-term puts and own longer-term puts at the same strike. You collect income and profit if the stock drifts down, while the long-term put cushions you on upside moves.
- Exactly what you sell short-term and buy long-dated, at the same strike
- The payoff: income from rolls, profit from a downside drift, losses on sharp moves
- Your numbers: max profit, monthly roll credit, and the risk on sharp moves
- When a put calendar is the right downside income play, and when to roll or close
A put calendar is a bearish time-decay machine. You are betting the stock drifts downside slowly. You sell short-term puts at a strike below the current price and buy longer-term puts at the same strike. As time decays, the short put loses value faster. If the stock drifts down, the long put gains value from the move. Every month you close the short put for profit and sell a new one.
What You Actually Do
Apple trades at $200. You expect it to drift downside slowly toward $185 over the next few months. You sell one 1-month $190 put for $2 a share, $200, and simultaneously buy one 2-month $190 put for $3 a share, $300.
Your net cost: $300 minus $200 = $100 debit. That is your risk. As the month passes and time decays, the short put decays faster than the long put (both at $190, but different expirations). If Apple drifts to $195, the short put approaches $0 and you can buy it back for near-zero, realizing the $200 credit. The long put is now a 1-month at-the-money put worth $3, so you can sell it for new credit and hold a new longer-dated put.
The Payoff, Drawn
Drag the slider to see how you do at every ending price for Apple (at the short-term expiration).
The shape shows the bearish lean. At $200 (above the strike), both puts are out of the money. The short decayed toward zero and you are in profit. Move below $190 and both puts become in-the-money, but the long put still has value while the short ate into profit. The downside profit is capped slightly because the short put's intrinsic value grows with the stock's fall, but your long put gains even more. The net is still profitable on a downside move, unlike a neutral calendar.
The Bearish Tilt: Drifting Down, Collecting Income
A put calendar is a calendar spread with a bearish edge.
A neutral calendar profits most if the stock stays at the strike. A put calendar profits more if the stock drifts below the strike. This is because the long put gains delta as the stock falls, creating a bearish edge. You are not just collecting time decay, you are also betting on a slow downside drift.
Month one: you sell the 1-month $190 put, pocket $200, buy it back for $50, realize $150 profit. Now you own the 2-month put, which is now a 1-month at $200 strike. Month two: you sell it for $3, buy a new 2-month for $4, pay $100 more, realize $200 profit. Month three: repeat. Over three months you could collect $150 + $200 + $200 = $550 profit on a stock that drifts from $200 to $185. The calendars stacked on top of each other become a downside income machine.
The catch: if the stock crashes to $170, your short puts cap your downside gain, and you only profit on the long put's remaining value.
When a Put Calendar Fits
- You expect slow downside drift, not a sharp crash
- IV is elevated and the near-term is fat
- You want monthly downside income via rolling the near-term
- You expect a sharp downside move (short put caps you)
- You expect upside or a rally
- IV is low and premiums are thin for rolling
The put calendar is for the trader who expects a slow downside drift and wants to collect income while waiting. It is not for the trader expecting a sharp move down or up.
A Worked Example
Walk the same trade through a month: you paid $100 net for the put calendar.
Apple stays at $200. The 1-month $190 put decayed to near $0 (the 2-month is now 1-month and worth $2). You close the short for $0 profit and realize your $200 credit. Your long put is now 1-month and worth $2. Net profit on month one: $200 minus the $100 you paid upfront = $100 profit. Now you own the 1-month and can sell another next month.
Apple falls to $190. The 1-month $190 put is at the strike, worth about $1. Your long 2-month is worth about $2 (it is at the strike and has a month of time left). Your spread is worth $1 (long $2, short $1). You paid $100, so you are up about $1 — break even basically, but you kept the short's credit upfront so really you are flat or slightly up on the month.
Apple crashes to $180. The 1-month $190 put is $10 in the money, worth $1,000. Your long 2-month is worth about $1,200 (it is $10 ITM and has a month of time left). Your spread is worth about $200 (long $1,200, short $1,000). You paid $100, so you are up about $100 on the position, even though the stock crashed below your strike. The long put's extra value cushioned the move.
That is the put calendar in one month: good profit on a hold or drift down, small profit on a sharp crash down. Unlike a neutral calendar, the downside drift is your friend.
- A put calendar is selling a short-term put and buying a longer-dated put at the same (usually lower) strike: income and downside.
- Max profit grows with rolling: monthly credits compound, and the long put gains from downside drift.
- The long option provides a cushion on upside, so losses are capped (not undefined like naked shorts).
- It fits slow downside drift where you want monthly rolling income; it struggles on sharp moves or upside.
Pop Quiz
Two quick checks. Pick an answer and the explanation shows up right away.
You sell a 1-month $190 put for $2 and buy a 2-month $190 put for $3. What is your initial cost?
You pay $300 for the long put and collect $200 for the short put, so your net cost is $100 debit. That is your initial risk.
At the short-term expiration, Apple is at $190. The short put is at the strike (worth $0 intrinsic). The long put (now 1-month at $190) is worth $2. What is your profit?
You collect the full $200 from the short put (it expired at the strike with no intrinsic). You keep the long $2 value. You paid $100 upfront, so profit is $200 minus $100 = $100. Next month you can roll again.
Bottom Line
A put calendar is how you harness bearish time decay and downside drift for monthly income. The near-term put decays faster than the long-term, and if the stock drifts down, you capture that downside plus the decay as profit. Roll it every month for new credit. Master the put calendar and you have a repeatable, rolling income machine that works on slowly falling stocks. Reach for it when you expect the stock to drift downside slowly, IV is fat, and you want to collect premium month after month while riding the downside.