Quarterly, season, and calendar contracts expire through the cascade process. This process breaks down contracts that are close to their expiration date into contracts with shorter delivery periods than the original contract, so that hedges can be made on those contracts with others that are in the registration period and therefore, settle the gas that covers the delivery period.
For gas, the last registration day is 2 business days before the start of the delivery period.
The cascade consists of the following:
Liquefied Natural Gas contracts do not cascade.
The setup below shows two examples of the cascade breakdown of a futures contract.
Open Position of Annual Contract
FT– Annual | |||||
FT Q1 | FT Q2 | FT Q3 | FT Q4 | ||
FT Q1 | |||||
FT M1 | FT M2 | FT M3 |
Open Position of Seasonal Contract
FT– Seasonal | |||||
FT SS | FT SW | ||||
FT Q2 | FT Q3 | FT Q4 | FT Q1 | ||
FT M1 | FT M2 | FT M3 |
The shaded cells are contracts used to carry out the cascade to close the position.
SS: Summer Season
SW: Winter Season (Q1 corresponds with the first quarter of the following year)
The trades used to carry out the cascade do not generate fees. The Z trades are used at the daily settlement price.
Annual Contracts
The Annual futures contract is closed at the Annual final settlement price and the four Quarterly contracts are opened at the final settlement price of the Annual contract as well, which is equal to the Last Register Day.
Seasonal Contracts
The Seasonal futures contract is closed at the Seasonal final settlement price and two Quarterly contracts are opened at the final settlement price of the Seasonal contract as well, which is equal to the Last Register Day.
Quarterly Contracts
The Quarterly futures contract is closed at the Quarterly final settlement price and three Monthly contracts are opened at the final settlement price of the Quarterly contract as well, which is equal to the Last Register Day.