US EIA Gasoline Production Change (Sep/18) -0.054M (Prev. 0.336M)

A swing of this size in gasoline output, from a solidly positive prior reading to near flat, points to refinery run adjustments rather than a demand signal, and on its own has historically moved RBOB and crack spreads little unless it corroborates the stock change. In past episodes, the market reaction has hinged on whether the production shift aligns with the utilisation print and with seasonal patterns around maintenance turnarounds and the switch between summer and winter grade specifications. The numbers that set the tone for the session tend to be the headline crude and product stock changes versus the API figures released the prior evening, since divergences between the two surveys are a recurring source of opening volatility. Worth noting is whether this is a one-week refinery blip or the start of a run-rate trend, which subsequent weekly prints and utilisation readings would clarify.