Amendment to frequency and timing window of US low-carbon aluminium differentials: pricing notice

After a 30-day consultation period, Fastmarkets will lower the frequency of its assessments for MB-AL-0389 aluminium low-carbon differential P1020A, US Midwest and MB-AL-0390 aluminium low-carbon differential value-added product US Midwest. Fastmarkets will also extend the timing window of these assessments to include any transaction data concluded within up to 18 months.

The first amendment decreases the differentials’ publishing frequency to once monthly from once weekly. Both differentials will be next assessed on January 3, 2025, and on the first Friday of each month thereafter. The monthly frequency matches Fastmarkets’ low-carbon aluminium differentials in other regions and better reflects current market liquidity. No feedback was received during the consultation period, which began on November 21.

The second amendment extends the timing window to include any transaction data concluded within up to 18 months, from three months previously. The extension of the timing window will allow for an inclusive approach to an evolving low-carbon marketplace, allowing Fastmarkets to capture all reported transaction data under one robust differential. No negative feedback was received during the consultation period.  

The new specifications for the differentials will be as follows (changes in italics):

MB-AL-0389 Aluminium low-carbon differential P1020A, US Midwest, US cents/lb
Carbon limit: 4tCO2e per tonne of aluminium produced, Scope 1 and 2 emissions.
Quality: P1020A or 99.7% minimum Al purity (Si 0.10% max, Fe 0.20% max). Ingot, T-bar, sow
Quantity: Min 100 tonnes
Location: Delivered consumer works Midwest, differential on top of P1020A premium and exchange-listed aluminum price.
Unit: US cents per pound
Timing: Up to 18 months
Publication: Monthly, first Friday of the month, 3-4pm London time.

MB-AL-0390 Aluminium low-carbon differential value-added product, US Midwest, US cents/lb
Carbon limit: 4tCO2e per tonne of aluminium produced, Scope 1 and 2 emissions.
Type: Extrusion billet, primary foundry alloy, wire rod, slab
Quantity: Min 100 tonnes
Location: Delivered into US Midwest region, differential on top of value-added product premium and exchange-listed aluminum price
Unit: US cents per pound
Timing: Up to 18 months
Publication: Monthly, first Friday of the month, 3-4pm London time.

These prices are a part of the Fastmarkets base metals package.

To provide feedback on this price, or if you would like to provide price information by becoming a data submitter to this price, please contact Yasemin Esmen by email at pricing@fastmarkets.com. Please add the subject heading “FAO: Yasemin Esmen, re: US low-carbon aluminium differentials.”

Please indicate if comments are confidential. Fastmarkets will consider all comments received and will make comments not marked as confidential available upon request.

To see all Fastmarkets pricing methodology and specification documents, go to https://www.fastmarkets.com/methodology.

What to read next
The publication of these prices was delayed for 54 minutes. Fastmarkets’ pricing database has been updated. The following prices were affected: • MB-FEO-0004 molybdenum, MB drummed molybdic oxide Mo, in-whs Busan• MB-FEO-0003 molybdenum, drummed molybdic oxide, 57% Mo min, in-whs Rotterdam• MB-FEO-0001 ferro-molybdenum, 65% Mo min, in-whs Rotterdam. These prices are part of the Fastmarkets ores and alloys […]
The publication of several of Fastmarkets' copper concentrates indices was delayed on Friday February 27 because of a technical error. Fastmarkets' pricing database has been updated.
Fastmarkets has corrected its MB-FEV-0001 Ferro-vanadium basis 78% V min, 1st grade, ddp Western Europe, $/kg V price, which was published incorrectly on February 27, 2026, due to a reporter error.
Fastmarkets is inviting feedback from the industry on the methodology for its audited steelmaking raw materials indices, as part of its announced annual methodology review process. The consultation, which is open until Friday March 27, seeks to ensure that our audited methodologies and price specifications continue to reflect the physical markets for steelmaking raw materials, […]
This is to better reflect market activity and liquidity, which is closely linked to liquidity quotes in the palm and laurics markets. The new specifications are as follows, with amendments in italics: AG-PLM-0035 Crude palm oil mill effluent, fob MalaysiaQuality: Free fatty acids (FFA) min. 30%, moisture, impurities and unsaponifiable matter (MIU) max. 3%, total fatty […]
Fastmarkets has corrected the date of its Polish Containerboard prices, which was published incorrectly on Thursday February 26 2026.