SUBSCRIBER NOTE: Platts seeks comments on Shale Value Chain assessments

Following initial research, Platts is proposing several new calculations and assessments, collectively known as the Shale Value Chain.

Platts is proposing to launch these assessments:

-- Gulf Coast Ethane Fractionation Spread -- Gulf Coast E/P Mix Fractionation Spread -- E/P Mix Midcontinent to Rockies Fractionation Spread -- E/P Mix Midcontinent Fractionation Spread -- National Raw NGL Basket Price -- National Composite Fractionation Spread

The foundations of the Shale Value Chain assessments lie in the benchmark natural gas prices that Platts daily assesses, as well as its daily natural gas liquids assessments.

Gulf Coast Ethane Fractionation Spread The price differential between prompt purity ethane at Mont Belvieu non-LST and the Houston Ship Channel daily natural gas price.

Gulf Coast E/P Mix Fractionation Spread The price differential between prompt ethane/propane mix at Mont Belvieu non-LST and the Houston Ship Channel daily natural gas price.

E/P Mix Midcontinent to Rockies Fractionation Spread The price differential between prompt ethane/propane mix at Conway, Kansas, and the CIG, Rocky Mountains daily gas price.

E/P Mix Midcontinent Fractionation Spread The price differential between prompt ethane/propane mix at Conway, Kansas, and Natural Gas Pipeline Co. of America, Midcontinent.

National Raw NGL Basket Price Comprises Mont Belvieu non-LST prices for purity ethane, propane, normal butane, isobutene and natural gasoline that are weighted by the general composition of a typical NGL barrel.

National Composite Fractionation Spread The price differential between the National Raw NGL Basket Price and the Houston Ship Channel daily gas price.

These assessments would be published daily in Platts Market Data, on Natural Gas Alert and in Gas Daily.

Platts is seeking comments and suggestions on these additions before making final decisions and announcements. All interested parties are encouraged to submit them by May 5, 2014, to samantha.santamaria@platts.com, with a cc to pricegroup@platts.com.