SUBSCRIBER NOTE: Details on USGC naphtha assessments in M2/M3 transition

Please note that S&P Global Platts will base US Gulf Coast standard and heavy naphtha assessments influenced by the Market on Close assessment process during the first autumn RVP gasoline transition on where pricing dates for MOC positions fall.

US Gulf Coast barge 87-unleaded gasoline, the basis for naphtha, will shift from 9 RVP to 11.5 RVP on September 7, 2016, in line with transitions in pipeline gasoline.

Any pricing date for barge naphtha before September 7 will be based on 9 RVP gasoline. Any pricing date including and after September 7 will be based on 11.5 RVP gasoline. Pricing dates including basis gasoline at both RVP levels will be normalized to the RVP level of the current day's assessment.

The basis for barge naphtha will continue to be the current day's barge 87-unleaded assessment. Before September 7, that will be 9 RVP gasoline. On and after September 7, that will be 11.5 RVP gasoline.

Please send all questions and feedback to americas_products@spglobal.com with a cc to pricegroup@spglobal.com.