Copper Cathode
The refined, roughly 99.99%-pure form of copper produced at smelters and refineries, the standard unit traded on exchanges like the LME and COMEX and the base material for wire and cable manufacturing.
Covered in 27 MetalsCost.com News Intelligence articles, most recently on September 27, 2026.
Overview
Copper cathode is refined copper in slab form — flat rectangular sheets, typically around a metre square, that are essentially pure copper produced by electrolysis. It's the raw material unit of the entire copper industry: the grade that exchanges like the LME and COMEX use as their deliverable standard, and the form in which copper is actually bought, sold, and stockpiled before anyone turns it into wire, tube, or alloy. Cathodes are stacked, strapped into bundles, and shipped by the tonne between producers, traders, and fabricators worldwide.
How It's Manufactured
Cathode production starts with copper concentrate or ore, smelted at high temperature into matte and then blister copper, which is roughly 98-99% pure. That blister copper is fire-refined and cast into anodes, which are then hung in electrolytic cells filled with a copper sulfate and sulfuric acid solution alongside a thin starter sheet or stainless-steel cathode blank. An electric current dissolves copper from the impure anode and deposits it, atom by atom, onto the cathode as nearly pure metal, leaving the impurities behind. After several days in the cell, the built-up cathodes are stripped, washed, and bundled for shipment.
Byproducts
Anode slime, the sludge that collects at the bottom of the electrolytic cells, contains gold, silver, selenium, tellurium, and platinum-group metals concentrated from the original ore, and recovering it is often a meaningful revenue source for refiners in its own right. Smelters also capture sulfur dioxide from their off-gas and convert it into sulfuric acid, much of which is sold to the fertilizer industry, while slag from smelting is sometimes reprocessed to recover residual copper.
Who Consumes It
Wire rod mills are the largest single buyer, melting cathode and casting it into rod for the wire industry. Brass and bronze alloy producers, tube and sheet mills, and foundries all buy cathode directly as their base raw material, and it's the reference grade that traders, fabricators, and consumers hedge against using LME and COMEX futures contracts, even when they never take physical delivery. Electrical component manufacturers that need very high-purity copper, such as makers of superconducting or high-conductivity parts, also buy select cathode grades directly rather than working from rod.
Everyday Uses
Consumers never handle cathode directly, but it's the ancestor material behind nearly every copper object they touch — the wiring inside their walls, the cord on a phone charger, plumbing pipe, coins in some countries, cookware, and the windings inside a kitchen appliance motor all started as cathode sheets melted down and reshaped into something else entirely.
Industrial Uses
Cathode is the feedstock for continuous-cast rod that becomes wire, for alloying into brass and bronze used in fittings, valves, and marine hardware, and for rolled sheet and strip used in roofing and industrial equipment. It's also the starting point for any application that needs high-purity copper, including specialty electrical contacts, heat exchangers, and the windings inside motors and transformers.
Coverage
BHP and Amazon Test a Market for Lower-Emissions Copper From Escondida
BHP and Amazon have launched a pilot that turns the lower emissions of copper from Chile's Escondida mine into certificates Amazon can buy. It is an early attempt to put a verifiable label on greener copper.
Everyone Wants 'Green Copper', but Nobody Has Defined It Yet
Buyers and governments increasingly ask for 'green copper', but no country has agreed what the term means. A BusinessLine column argues India, a large and growing copper importer, should be the one to define it.
Rio Tinto to Expand Metals Trading Beyond Its Own Mine Output
Rio Tinto plans to expand its metals trading business beyond its own mine output, adding derivatives and third-party copper cathode deals, Bloomberg reported. The move is part of CEO Simon Trott's push to extract more value from the miner's existing assets.
Ivanhoe Electric's Santa Cruz Copper Project Gets a $1.5 Billion Valuation in New Feasibility Study
Ivanhoe Electric's Santa Cruz copper project in Arizona carries a $1.5 billion base-case NPV, rising to $3.5 billion at today's copper price, per a new preliminary feasibility study.
A Record $500 Million Copper Shipment Is Adding to a Port Backlog in New Orleans
A rush of copper imports ahead of a possible US tariff has jammed the Port of New Orleans, with a record $500 million cargo arriving as roughly 100,000 more tonnes are due by October.
Copper Climbs to $14,456 a Tonne as China's Import Premium Hits a Four-Year High
Copper rallied 1.6% to $14,456 a tonne as China's Yangshan import premium hit a four-year high and Shanghai warehouse stocks fell to a 20-month low, both signs of genuine physical demand.
Hindustan Copper Plans to More Than Triple Ore Output by 2030 Under a Rs 7,200 Crore Roadmap
Hindustan Copper's Vision 2030 plan targets ore output of 12.2 million tonnes by FY30, more than triple FY26 levels, through Rs 7,200 crore in capex, a JSW-backed mine reopening in Jharkhand, and a revived Gujarat copper-recycling plant.
Copper Drops 4.4% From Its Record High After the White House Delays a Tariff Decision
Copper fell 4.4% from its record high after reports the White House delayed a refined-copper tariff decision, easing the stockpiling rush that had driven the rally.
Copper's Record Price Puts the Spotlight on Vedanta Limited's Growing Copper Business
As LME copper hit a record $14,703 a tonne, Vedanta Limited's copper unit posted its best Q1 rod sales in eight years and holds roughly 23% of India's primary copper market.
Copper's Record Rally Is Squeezing Smelters as Treatment Charges Turn Sharply Negative, Industry Body Says
Copper hit a record $14,737 a tonne as IPCPA warns a mining-smelting capacity mismatch has pushed treatment charges from positive to roughly negative $1,300 a tonne.
Hindustan Copper Stock Jumps 4% as Copper Prices Hit a Record High, Turning Focus to Valuation
Hindustan Copper shares rose 4.69% to Rs 533 on September 8 as LME copper hit a record $14,617 a tonne, extending a rally that has more than doubled the stock over the past year and put its valuation in focus.
Copper Hits a Record High as Traders Race to Beat Trump's Looming US Tariff
Copper hit a fresh London Metal Exchange record on September 7 as traders kept rushing refined metal into record US warehouse stockpiles to beat a possible Trump tariff, straining supply outside America.
Best Metal Stocks in India: Hindustan Zinc vs Hindustan Copper
Hindustan Zinc's market value is nearly five times Hindustan Copper's, with higher margins tied to zinc's global cycle, while smaller, government-backed Hindustan Copper expands capacity and margins from a lower base.
China's Copper Scrap Suppliers Keep Selling as Shanghai Copper Price Nears 110,000 Yuan
China's copper scrap suppliers sold into strength on September 7 as Shanghai futures copper climbed to 109,630 yuan a tonne, while a narrowing cathode-scrap spread and higher invoice costs kept downstream buyers cautious.
Glencore Shares Hold Steady Near Yearly Highs After a Blockbuster Earnings Turnaround
Glencore shares are trading near their 52-week high as investors digest a first-half turnaround: net profit swung to $4.4 billion on record trading profits and a copper price rally.
Lloyds Metals' Profit Jumps 141% as India's Top Iron Ore Miner Pushes Into Steel and Congo Copper
Lloyds Metals & Energy's profit rose 141% year-on-year in Q1 FY27 on record iron ore and pellet output, as the company expands its Maharashtra mine and pushes into steel and Congo copper, funded by rising debt.
Quebec's Steel, Copper and Aluminium Exports Fell 36% as the US-Canada Trade War Bites
New BBC data shows Quebec's steel, copper and aluminium exports fell 36% over a year and Canada lost roughly 55,000 manufacturing jobs as the tariff dispute drags on, with 90,000 more jobs estimated at risk.
Goldman Sachs Expects Copper to Slide Toward $11,000 a Tonne After January's Record High
Goldman Sachs forecasts copper easing to $10,000-$11,000 a tonne by year-end 2026, down from January's record $14,500, as US stockpiling capacity fills and the scarcity premium behind the January spike fades.
Chile and Argentina Approve a $20.7 Billion Copper Treaty — But It Won't Fix Today's Shortage, Analysts Say
Chile cleared a $20.7 billion copper treaty promising 540,000 tonnes a year, but permitting delays and a suspended Codelco mine mean today's shortage isn't going away soon.
Copper Market Tipped Into a Real Deficit in June as Supply Setbacks Mount, Commerzbank Says
Commerzbank flags a real 85,000-tonne copper deficit in June that shrank 2026's surplus to just 32,000 tonnes, as China's smelters cut output and mine setbacks in Chile and Congo compound the squeeze.
Zijin Mining Warns Congo Flooding Could Cut Its Copper Output by 57,000 Tonnes This Year
Zijin Mining warned its attributable Kamoa-Kakula copper output could drop by up to 57,000 tonnes in 2026 due to flooding, adding a fresh supply risk as copper trades near record highs.
Copper's Record Run Reflects a Supply Squeeze That Could Take 17 Years to Fix, Sprott Says
Copper has climbed above $14,300 a tonne on a widening supply deficit, with Sprott pointing to Chile's declining output and a roughly 17.5-year lag before new mines can respond.
Copper Slips Below $14,000 a Tonne as Warehouse Deliveries Ease a Historic Supply Squeeze
Copper prices pulled back below $14,000 a tonne on August 19, 2026, their sharpest one-day fall since July 23, as London Metal Exchange warehouse stocks rose for a sixth consecutive session and eased a record-breaking supply squeeze.
Copper's COMEX-LME Price Gap Becomes a Live Bet on Trump's Next Tariff Move as London Warehouses Run Dry
Copper is trading near a record $14,500 a tonne as tariff-driven US-bound flows drain LME warehouses to 214,550 tonnes, widening backwardation to a five-year high and turning the COMEX-LME price gap into a live tariff-odds gauge.
Antofagasta's Margins Hit 63% on Record Copper Prices Even as a Chile Storm Forces a Lower Production Target
Antofagasta's H1 2026 EBITDA margin hit 63.4% on a record $6.19-a-pound realized copper price, even as lower output at Los Pelambres and Centinela — worsened by a July storm — forced a cut to full-year production guidance.
Copper Retests Its Record High as an Indonesian Smelter Goes Down and Aluminum Jumps on a Brazilian Gas Shortage
Copper hit $6.7005/lb, near its record, after a converter leak shut the Indonesian smelter processing Grasberg ore, taking 342,000 tonnes/year offline as aluminum jumped on a Brazilian alumina cut.
Freeport-McMoRan Beats Q2 Earnings Estimates as Copper's Record Rally Fuels Analyst Upgrades
Freeport-McMoRan's Q2 2026 profit beat Wall Street estimates by 25% as copper prices hit record highs on AI data-center and electrification demand, prompting Scotiabank and Bank of America to raise price targets.
