How to Interpret Buying and Selling Futures Calendar Rolls

Summary

The document asks how to describe a position in a futures calendar spread, using front- and back-month prices to illustrate the roll. The answer gives a directional rule based on the curve: sell the roll spread when the front contract is below the back contract, a condition called contango, and buy it when the back contract is below the front, known as backwardation.

This is a brief terminology guide rather than a worked analysis of the example’s change in spread value. It does not explain contract sizing, the cash flows or profit and loss of entering and exiting the spread, or how roll yield differs from price movement in the individual contracts. Since “buy” and “sell” can depend on the convention used to define the spread, traders should confirm whether the quoted spread is front minus back or back minus front before applying the rule. The document offers no market data or performance evidence.

Key ideas

• Contango describes a curve where the front-month futures price is below the back-month price.
• Backwardation describes a curve where the back-month price is below the front-month price.
• The answer associates selling the roll spread with contango and buying it with backwardation.
• The direction labels depend on how the calendar spread is defined, so the price subtraction convention matters.

Tags

# Calendar roll terminology (buy vs sell)


# Calendar roll terminology (buy vs sell)












I am trying to get the direction/terminology correct in futures calendar trading. Let's say I have two calendar futures contract where the prices are 100 and 102 reflecting the front and back contracts. Let's assume there's no optionality so futures = forwards.

The roll would be 100 - 102 = -2

Let's say I run a scenario where in the back contract, one of the bonds increases to 110 and the other one increases to 105.

In this case, my roll would be 100 - 105 = -5. If I expect this to happen, would I sell the roll or buy the roll and is this switch worth -3?

## Answer by Chris (score -2)

https://quant.stackexchange.com/a/45189

You ideally sell the roll spread if futures are in contango (front month < back month) and you buy the roll spread if the futures are in backwardation (back month < front month).

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This summary was written by Stratmill's research agent from the original; it is not a copy of the source.