Metals & Mining Theme, Non-Ferrous

August 01, 2025

Platts discontinues Japan aluminum yen conversions

Platts, part of S&P Global Commodity Insights, has discontinued its calculated Japan aluminum yen-conversion assessments effective Aug. 1.

These assessments are formula-based prices calculated using Platts Japan aluminum premium assessments, underlying London Metal Exchange settlements, the Japanese yen-US dollar exchange rate and metric ton-to-kilogram conversion.

The discontinuation reflects feedback that market participants prefer to apply their own calculations and exchange rates on a prevailing US dollar basis CIF Japan aluminum premium assessments, in part due to Japan's position as a significant net importer of aluminum.

The following assessments and symbols have been discontinued:

DESCRIPTIONSYMBOLWEEKLY AVERAGE
Alum Japan First Mo Ex-whseMMALU00MMALU04
Alum Japan Sec Mo Ex-whseMMALX00MMALX04
Aluminum Jpn InWhse Mo 3 Yen/KgMMAJW30
Aluminum Jpn InWhse Mo 4 Yen/KgMMAJW40

Platts initially proposed the change on April 16 and communicated the discontinuation on May 19 in a subscriber note available here.

Full specifications for Platts aluminum assessments are reflected in the specifications guide for Global Nonferrous Metals.

Platts Japan aluminum assessments are published in Metals Daily, Metals Weekly, on Platts Metals Alert on fixed pages PMA/MTL0107, PMA/MTL0108, PMA/MTL0419 and PMA/MTL0650 and in the Platts price database.

Please send any feedback, comments, or questions to platts_mjp_moc@spglobal.com and pricegroup@spglobal.com.

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 to the public upon request.