We will use the December 2024 futures contract. If it expires before the due date we will use January 2025 futures.
We will use the prior settled last price on to expire the contract. This is available on the CME page, https://www.cmegroup.com/trading/energy/crude-oil/light-sweet-crude_quotes_globex.html https://www.cmegroup.com/markets/energy/crude-oil/light-sweet-crude.quotes.html
DETAILS:
Oil futures trade M-F 6pm-5pm ET (e.g. opens at 6pm and closes at 5pm, having a one hour break), https://www.cmegroup.com/trading/energy/crude-oil/light-sweet-crude_contractSpecs_futures.html We will use the LAST listed on the expiry source for contracts, https://www.cmegroup.com/trading/energy/crude-oil/light-sweet-crude_contractSpecs_futures.html which is the price at 5pm.