Today I was unable to place an order for the full-sized electronic contract (january) through IB because it is physically settled and not cash settled like the mini contract. It appears they won't allow it that close to expiration. From what I gather the Jan contract is still the front month, at is trading at a higher volume. OR Am I wrong there. Nymex website states: Trading terminates at the close of the 3rd business day prior to the 25th calendar day of the month preceding delivery. If 25th calendar day is a non-business day, trading shall cease on the third business day prior to the business day preceding the 25th calendar day. CAN SOMEONE CLARIFY THIS AND TELL ME WHEN EXACTLY THE ROLLOVER TO THE NEW FRONT MONTH OCCURS? DID IT OCCUR TODAY, IF IT DID NOT WOULD ONE HAVE TO EXECUTE THE MINI CONTRACT ONLY?