Correction to copper concentrates treatment and refinement charges indices on 27 February 2026

Fastmarkets has corrected its copper concentrates treatment and refinement charge indices, which were published incorrectly on February 27 2026 due to a backend calculation error. Fastmarkets has also corrected the indices' rationale and all related inferred indices.

The following affected prices have been corrected:

MB-CU-0287 Copper concentrates TC index, cif Asia Pacific, $/tonne was published in error as $(80.30). It has been corrected to $(80.20).

MB-CU-0288 Copper concentrates RC index, cif Asia Pacific, US cents/lb was published in error as (8.030) cents/lb. It has been corrected to (8.020) cents/lb.

MB-CU-0508 Copper concentrates TC implied smelters purchase, cif Asia Pacific, $/tonne was published in error as $(53.45). It has been corrected to $(53.35).

MB-CU-0509 Copper concentrates TC implied traders purchase, cif Asia Pacific, $/tonne was published in error as $(107.15). It has been corrected to $(107.05).

MB-CU-0510 Copper concentrates RC implied smelters purchase, cif Asia Pacific, US cents/lb was published in error as (5.345) cents/lb. It has been corrected to (5.335) cents/lb.

MB-CU-0511 Copper concentrates RC implied traders purchase, cif Asia Pacific, US cents/lb was published in error as (10.715) cents/lb. It has been corrected to (10.705) cents/lb.

Fastmarkets’ pricing database has been updated to reflect these changes.

The correction also affected the monthly averages and quarterly averages derived from these daily prices, which have been updated accordingly.

The rationale for MB-CU-0287 had erroneously stated:

“The spot copper concentrates TC index was at -$80.30/t, down by $0.40/t from -$79.90/t a week earlier.
The implied smelter TC index was at -$53.45/t, down by $0.40/t from -$53.05 a week earlier.
The implied trader TC index was at -$107.15/t, down by $0.40/t from -$106.75/t a week earlier.”

This has been corrected to:

“The spot copper concentrates TC index was at -$80.20/t, down by $0.30/t from -$79.90/t a week earlier.
The implied smelter TC index was at -$53.35/t, down by $0.30/t from -$53.05 a week earlier.
The implied trader TC index was at -$107.05/t, down by $0.30/t from -$106.75/t a week earlier.”

These prices are part of the Fastmarkets non-ferrous metals package.

For more information or to provide feedback on this correction notice, or if you would like to become a data submitter to these indices, please contact pricing@fastmarkets.com and basemetals@fastmarkets.com. Please add the subject heading “re: Copper concentrates indices.”

To see all Fastmarkets pricing methodology and specification documents, go to the Fastmarkets methodology page

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