Options expiration for Energy complex

Can someone tell me when opts ex for Nat Gas, oil etc is? What is the rule?

Thanks.

nitro

 

Go to NYMEX.com....look up the contract and options expiration calendar. Based on the listed last trading day, count the number of business days from the beginning of the month to expiration AND count the number of business days from the last business day of the month backwards to expiration. One of the counts should be "consistent". It appears that natural gas option expire on the "fourth to the last business day of the month". Crude oil options are slightly different. You figure out their "rule".

 

Thanks for the response. I will do as you suggest.

nitro