Calendar Spread
A calendar spread buys a derivative on an asset for one month and sells the same type on the same asset for another month. In options it usually means selling a near-term option and buying a longer-dated one at the same strike to profit from faster time decay.
Most spreads mix strikes; a calendar spread mixes dates. In futures, traders buy one delivery month and sell another to bet on how their price gap changes. In options, they sell a short-dated option and buy a longer one, hoping the short option loses value faster. This entry explains both versions, the payoff logic and the risks.
- Category
- Derivatives
- Reading time
- 4 min
- Also called
- Time spread, Horizontal spread, Intra-market spread
- Updated
Calendar spreads in plain words
A calendar spread buys a derivative on an asset in one month and sells a derivative on the same asset in another month.1
In futures, near months tend to swing more than deferred months, which shapes how the spread behaves.1
In options, the time left until expiry is a key part of each option's price, which is what an options calendar spread trades on.2
How to set up an options calendar spread, step by step
Pick a strike
Usually near the current price. See Strike Price.
Sell the near month
It loses time value faster. See Option Greeks.
Buy a later month
Same strike, same type.
Pay the net debit
The longer option costs more. See Option Premium.
Hope for calm
Best if price stays near the strike.
Close or roll
Around the near option's expiry.
Worked examples
Example 1 — Options calendar
$250 riskedStock at $100. Sell the 30-day $100 call for $2.50; buy the 90-day $100 call for $5.00.
| Net debit | $5.00 − $2.50 = $2.50 |
| Cost per spread | $2.50 × 100 = $250 |
Longer time to expiry makes the back-month option more expensive than the front month.2
Example 2 — Price stays put
+$130At the 30-day expiry the stock is $100. The short call expires worthless; the long call is worth $3.80.
| Spread value | $3.80 |
| Profit | ($3.80 − $2.50) × 100 = $130 |
When price stays near the strike, the short option decays away while the long option keeps value. See Option Greeks.
Example 3 — Futures calendar
+$1 a barrelBuy March crude oil at $70, sell June at $68. Later March is $72, June $69.
| Spread at entry | $70 − $68 = $2 |
| Spread later | $72 − $69 = $3 |
| Gain per barrel | +$1 |
A futures calendar spread profits from changes in the gap between months, not the overall price level.1 See Contango and Backwardation.
Calendar vs vertical spread
| Aspect | Calendar | Vertical |
|---|---|---|
| What differs | Expiry dates | Strike prices |
| Main driver | Time decay, volatility | Direction |
| Best outcome | Price near the strike | Price beyond the short strike |
| See also | Diagonal spreads | Vertical Spread |
When traders use calendar spreads
Neutral outlook
Expecting a quiet market near term.
Volatility views
Long calendars benefit from rising implied volatility. See Implied Volatility.
Futures roll trades
Trading term-structure changes. See Futures Spreads.
Earnings plays
Selling inflated near-term premium.
Advantages and disadvantages
Advantages
- Profits from time decay with limited risk.
- Lower margin than outright futures.
- Flexible for neutral or volatility views.
Disadvantages
- Losses if price moves far from the strike.
- Sensitive to volatility changes.
- Harder to model than verticals.
Going deeper
Read as far as you need. Each level builds on the one before it.
Futures in grain markets
Beginner
In grain markets, buying one month and selling another of the same grain is called an intra-market or calendar spread.1
Volatility exposure
Intermediate
Option premiums depend partly on volatility, so a rise in the back month's implied volatility helps a long calendar.2 See Implied Volatility.
Early assignment
Advanced
The short near-term option can be assigned, leaving a position that needs managing. See Exercise and Assignment.
Common mistakes
Ignoring big moves
Calendars lose when price runs away.
Overlooking volatility
A volatility drop can hurt.
Holding past the front expiry
The hedge disappears.
Mixing up futures and options versions
The drivers differ.
Check your understanding
Test yourself before moving on. Each answer comes with an explanation.
Key points to remember
- Calendar spreads use different months on the same asset.
- Options versions sell near-term and buy longer-term.
- They profit from time decay when price stays near the strike.
- Futures versions trade the gap between months.
- Volatility changes affect the result.
Frequently asked questions
What is the maximum loss on an options calendar?
Is a calendar spread bullish or bearish?
What is a diagonal spread?
Further learning
- Vertical Spread
Spreads across strikes.
- Option Greeks
Theta and vega drive calendars.
Sources
This article is written in our own words. The sources below support the specific facts, rules and figures marked with a number in the text. Links open the original publisher’s page.
- Corporate Finance Institute. Calendar Spread (opens in a new tab) Checked .
- Investor.gov (SEC). An Introduction to Options – Investor Bulletin (opens in a new tab) Checked .
Educational content, not financial advice. Examples use hypothetical prices and simplified costs; actual fees, margin rules and regulations vary by broker, market and country. We are not affiliated with any publisher linked above. Last reviewed . Report an error or request a source credit.