October RBOB prices traded higher overnight, seemingly in response to private reports that showed US gasoline supplies falling by more than expected last week. Meanwhile, some traders noted a level a caution in today's session ahead of September contract expiration, which has experienced an elevated level of volatility relative to the October contract in recent sessions. The spread shows the September contract trading at a $0.16 premium over October, indicating a level of short term tightness in the market. EIA monthly data indicated that US Gasoline demand was at its highest level since September 2010 in June.