October RBOB prices experienced a gap lower open Sunday evening, pressured by weakness in Brent crude oil and a weak outside market tone. The November Brent vs. RBOB crack spreads (refining profitability using Brent) slumped below the $4.00 a barrel level last week and remains under that level this morning. Some traders indicated that a continued fall in the spread below the $2.00 level could prompt some refiners to halt operations for economic reasons. The Commitments of Traders Futures and Options report as of September 13th for gasoline (RBOB) showed non-commercial traders were net long 44,843 contracts, a decrease of 9,868. Non-commercial and nonreportable traders combined held a net long position of 54,754 contracts, for a decrease of 8,236. Prices were down by more than 2.8% during the report window, but they have increased by $0.04 since.