Platts proposes to discontinue Seattle ULSD differential, relaunch with new pricing basis

Platts, part of S&P Global Commodity Insights, proposes to discontinue the Seattle ULSD differential, which shows the difference between Seattle and Portland ULSD, and launch a new assessment for the Seattle ULSD differential versus NYMEX ULSD futures, effective April 23, 2025.

The current Seattle ULSD assessment is priced as a differential to the Portland ULSD assessment but is described as a differential to the NYMEX ULSD futures contract in Platts' publications.

The proposed launch of the new Seattle ULSD differential versus NYMEX ULSD would include backfilling the new assessment to the date of the original price's launch using the NYMEX ULSD futures as its basis.

The proposed change would impact the following assessments:

The current Seattle ULSD assessment is published on pages PGA0481, PRF0481, PGA0158, PRF0158, PGA0450, PRF0450, PGA0451, PRF045, in the Oilgram Price Report, US Marketscan, and the Platts price database under the symbols listed above.

Platts invites feedback, comments and questions on this proposal to americas_products@spglobal.com and pricegroup@spglobal.com by March 25, 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.