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

What to read next
Fastmarkets has decided to change the PIX Pulp China BHKP Net assessment seller side weighting table.
Copper in concentrate production from Ivanhoe Mines' Kamoa-Kakula complex in the Democratic Republic of Congo (DRC) fell to 61,906 tonnes in the first quarter, down by 54% from 133,120 tonnes a year earlier, with the company now evaluating local third-party concentrate purchases to advance the ramp-up of its on-site smelter, according to an April 13 production release as the market focused its attention on the impact of global sulfuric acid shortages during CESCO Week in Chile from April 13-17.
Fastmarkets invited feedback from the industry on the pricing methodology for European PIX Paper indices via an open consultation process between March 13 and April 14 2026. This consultation was done as part of our published annual methodology review process.
Fastmarkets is inviting feedback from the industry on the pricing methodology for its Middle East PIX Packaging GCC indices as part of its announced annual methodology review process.
Fastmarkets invited feedback from the industry on its pricing methodology and product specifications for ferrous metals, as part of its announced annual methodology review process. The consultation, which was open until April 2, sought to ensure that our methodologies continue to reflect the physical ferrous metals markets, in compliance with the International Organization of Securities Commission […]
Fastmarkets launches an antimony trioxide 99.5% Sb2O3 min, exw China price assessment on Friday April 17.