Platts seeks market feedback on inclusion of Top of Diamond trades in Transco, Leidy Line receipts natural gas index

Platts, part of S&P Global Energy, is seeking market feedback on whether Top of Diamond trades should continue to be included in the daily and monthly Transco, Leidy Line receipts natural gas indices (IGBIS00, IGBIS03) in the US.

As noted in subscriber notes published Aug. 1 and Aug. 26, these trades are currently mapped to the Transco, Leidy Line receipts index, as they fit the location methodology. Platts has observed that recent Top of Diamond trades have priced significantly higher than trades at other Leidy Line receipt points and is seeking to review the location's inclusion in the index.

Please send any feedback to AmericasGasPricing@spglobal.com and pricegroup@spglobal.com by Dec. 12, 2025.

For written comments, please provide a clear indication if comments are not intended for publication by Platts for public viewing. Platts will consider all comments received and will make comments not marked as confidential available upon request.