The LME Copper contract requires physical delivery of 25 tonnes of Grade A copper cathode per lot, with the metal conforming to one of three chemical-composition standards — BS EN 1978:2022 Cu-CATH-1, GB/T 467-2010 Cu-CATH-1, or ASTM B115-10 (2021) cathode Grade 1 (LME, Copper contract specifications). The exchange publishes an official Cash Settlement Price for Grade A Copper each business day, and this figure underpins downstream derivatives such as the CFTC-registered LME Copper CMA Swap, which settles against the arithmetic average of the daily official cash price over a contract month (CFTC, LME Copper CMA Swap (LBS) contract filing). Cash-settled LME futures more broadly follow a documented methodology: if a contract is untraded during the pricing period, the mid-point of the bid/offer at the close is used, falling back to the LME’s own “Expert Judgement” where no orderly market exists (LME, Cash-Settled Futures Daily Settlement Prices Methodology). Most physical supply contracts globally — from Indian auto-component sourcing to African concentrate offtake — reference LME cash or three-month settlement as the base price before adding a location- and grade-specific premium (Terra Insight, LME Aluminium & Copper Pricing for Indian Auto-Component Contracts).
The Shanghai Futures Exchange lists a domestic copper cathode futures contract used primarily by onshore Chinese buyers and sellers, with margin requirements escalating from 5% at listing to 15% in the delivery month (SHFE, Copper Cathode Futures Rules). Separately, the Shanghai International Energy Exchange (INE) — SHFE’s internationalized arm — lists a bonded copper futures contract priced and settled in RMB, with a 5-tonne contract size and 25-tonne delivery unit, open to overseas traders through FF Members or overseas brokers with RMB-denominated settlement accounts (INE, Bonded Copper Futures overview). Bonded warehouse storage fees are quoted at roughly 0.50 yuan per tonne per day indoors and 0.40 yuan outdoors, with an ownership-transfer fee of 1 yuan per tonne for non-physical warrant transfers (SHFE, Bonded Copper Warehouse Information). The SHFE-LME spread is a standing basis trade for institutional desks: reconciling it requires tracking bonded-versus-domestic VAT status, RMB/USD and RMB/CNH conversion at each exchange close, and the distinct settlement windows — LME ring close at 13:00 London time, COMEX close at 17:00 New York time, and SHFE close at 15:00 Shanghai time (Novaex, Cross-Exchange Basis Management for Metals Traders).
CME Group’s COMEX copper contract is a physically deliverable US-dollar-per-pound contract governed by CME Rulebook Chapter 111, distinct from the LME’s prompt-date warrant system (CME Group, COMEX Copper Futures Rulebook Chapter 111). Because COMEX settlement and the LME’s official/closing prices are structurally distinct — one a US exchange close, the other a ring-based process with prompt dates rather than fixed monthly expiries — basis-trading desks treat them as separate settlement types requiring independent resolution logs, not interchangeable daily quotes (Novaex, Multi-Exchange Basis Calculation: One Formula, Two Exchanges). Since 2025, LME copper has periodically diverged sharply from COMEX on trade-flow disruptions tied to US tariff policy, with COMEX trading at a premium as metal was pulled toward US delivery points ahead of prospective duties, only for the arbitrage to reverse as inventories built in US warehouses ahead of trade-policy deadlines (Barchart, Divergence in Copper: Can LME Copper Catch Up with COMEX Copper; TradingPedia, Copper Builds in U.S. Warehouses Ahead of Trade Cutoff, 8 Jun 2026).
Before any third-party issuer can tokenize LME copper, the LME had to digitize its own title layer. Since 1 March 2021, all LME warrants — the documents of title against warehoused metal — have been electronic rather than paper, with the LME itself acting as depository holding rights in the warrant and the underlying metal on behalf of the account holder inside its LMEsword settlement system (LME, LME warrants). The dematerialization proposal, first put to the market in a June 2023 discussion paper, replaced the need to physically courier and store paper warrants, removed the previous 200-warrant batch limit on lodgement instructions, and eliminated the requirement for a physical vault to hold the certificates themselves — while preserving “immobilised” paper warrants in the handful of jurisdictions where local law still requires them (Eurometal, LME issues discussion paper on electronic warranting proposal; LME, Depository Proposal member notice). This is functionally a permissioned, centrally operated ledger for metal ownership — not a public blockchain — but it is the operational precedent that HKEX-owned LME executives now point to when discussing further tokenization. LME chief executive Matthew Chamberlain said in May 2026 that the exchange is “studying how to leverage Hong Kong’s advantages in the digital assets market to promote the tokenization of physical assets,” directly linking the Hong Kong warehouse buildout to a tokenization roadmap (The Standard, Hong Kong to scale up LME-approved warehouse storage, 7 May 2026). Separately, Reuters reported on 1 July 2026 that the LME is considering easing rules to further boost Hong Kong as a metals hub, a track industry participants read as adjacent to the exchange’s tokenization ambitions (Reuters, LME considers easing rules to boost Hong Kong as metals hub, 1 Jul 2026).
The LME approved Hong Kong as an LME warehouse location for the first time on 20 January 2025, with storage permitted for the exchange’s main base metals including copper, zinc, and aluminium, becoming an active delivery point three months after the first warehouse company and location were approved (Bloomberg, LME Approves Hong Kong as Warehouse Location, 20 Jan 2025). The first four licensed facilities followed on 15 April 2025: GKE Metal Logistics (with local partner China Resources Logistics), Henry Bath & Son, PGS (East Asia) with SF Supply Chain, all approved to store copper alongside aluminium, aluminium alloy, nickel, lead, tin, and zinc (LME, LME approves first warehouse facilities in Hong Kong, 15 Apr 2025). Three additional facilities were added by 21 May 2025, bringing the total to seven (Metal.com, LME Approves Addition of Three More Warehousing Facilities in Hong Kong, 21 May 2025), and by 20 August 2025 Hong Kong had reached eight certified warehouses inside the LME’s global delivery system (Caixin Global, Hong Kong Joins LME’s Global Delivery System With 8 Certified Warehouses, 20 Aug 2025). Henry Bath listed its own Kwai Chung facility in Hong Kong’s New Territories on 28 November 2025, storing copper, aluminium, aluminium alloy, nickel, lead, zinc and tin — the 13th Hong Kong site approved since January, with warranting effective 5 December 2025 (Reuters, Henry Bath lists LME warehouse in Hong Kong, 29 Nov 2025). By May 2026, LME chief executive Matthew Chamberlain said Hong Kong storage capacity was being scaled toward the hundred-thousand-tonne level, and that the exchange was studying tokenization applications for the city’s digital-assets ecosystem (The Standard, Hong Kong to scale up LME-approved warehouses, 7 May 2026). The maximum daily storage fee warehouse operators can charge was set at 61 cents per tonne in Hong Kong versus 51 cents in Korea and Singapore (Reuters, LME approves warehousing in Hong Kong, a gateway for metals to China, 3 Feb 2025).
Outside the new Hong Kong sites, the LME’s established copper delivery points include Rotterdam (a primary continental European hub), Detroit (a long-standing US Midwest location historically associated with aluminium queue controversies but also licensed for copper), and Port Klang, Malaysia — a Southeast Asian delivery point operated in recent years under ISTIM’s ownership. Metal stored in Hong Kong can, per LME officials, be sold to a European buyer with delivery fulfilled through the exchange’s Rotterdam network, illustrating how the electronic warrant system allows ownership transfer across the global grid independent of physical location (LME News & Notices — Hong Kong warehousing approvals). The LME’s warehouse network spans 35 individual locations across 14 countries as of its most recent reform review, each governed by the same licensing, inspection, and rent-cap rules regardless of geography (LME, Discussion Paper on LME Warehouse Reform).
Physically, LME custody works by warehouse companies instructing their nominated London agent to create a warrant once metal of LME-specified quality and quantity has been deposited; the LME itself now performs the central depository role, holding the electronic warrant on behalf of the beneficial owner inside LMEsword rather than a third party managing physical certificates (LME, Depository Proposal member notice). For a copper owner, this means the chain of custody runs: physical cathode inspected and accepted into an approved warehouse → London agent issues an electronic warrant → LME depository function registers beneficial ownership → warrant can be bought, sold, or cancelled (triggering a physical load-out queue) without the metal itself moving until final delivery is requested. This structure is the closest existing analogue to a tokenized custody model in the base-metals world, even though the ledger is LME-operated rather than public or permissionless.
A single LME copper warrant represents 25 tonnes of cathode — worth roughly $230,000 to $240,000 at mid-2026 LME prices — making direct physical exposure inaccessible to retail investors without fractionalization. Industry analysts have long noted that unlike gold, which can be commoditized into jewelry, coins, and small bars, copper "trades per ton" and requires specialized bulk storage that makes retail-sized physical delivery impractical (Mesh Trade interview, Copper is not gold — and that’s the point). A 2010 Reuters analysis of proposed copper exchange-traded products found the core obstacle was insufficient inventory relative to the roughly 19-million-tonne annual demand market, with one analyst noting flatly that "others have tried a physical copper ETF, it didn’t work because there simply isn’t enough inventory" in a market that is essentially balanced rather than oversupplied (Reuters via Investing.com, Listed physical copper products face rocky ride, 21 Oct 2010).
Storage of copper in LME warehouses has historically cost more than $136 per tonne per year, and carrying cost estimates for copper and aluminium in LME sheds run approximately $0.03–$0.05 per metric tonne per day plus $15–$30 per tonne in loading/unloading fees (Reuters via Investing.com, Listed physical copper products face rocky ride; Equicurious, Storage Costs and Convenience Yield). Because copper has no dividends or yield to offset these costs, and because its value density per kilogram is a small fraction of gold’s, storage and insurance costs consume a proportionally much larger share of a token’s value than they do for a gold-backed product — making the economics of a small-denomination token structurally tighter from day one.
The gap is beginning to close, but only at pilot scale. Metals.io, a Tezos-based platform, launched tokenized cobalt (xCo) and nickel (xNi) in mid-2026 aimed at retail investors, with custody provided by Archax, an FCA-regulated UK custodian, and management has publicly discussed extending the same model to copper (The Armchair Trader, Tokenised cobalt and nickel now available for retail investors, 26 Jun 2026; YouTube/Metals.io, The New Way to Invest in Metals, 19 May 2026). Separately, South African platform Mesh Trade has begun offering tokenized exposure to 99.9% LME-investment-grade copper, fractionalized down to roughly 50 South African rand per unit, explicitly targeting the gap between mining-equity correlation and true commodity price exposure (YouTube, Copper is not gold — and that’s the point (Mesh Trade)). A third entrant, Tempestas Copper Inc’s TCu29, published a white paper describing a token backed one-for-one by one pound of audited, geographically diversified warehoused copper aimed at B2B, industrial, and DeFi users rather than retail speculation (Tempestas Copper, TCu29 Physically-Backed Copper Token Executive Summary/White Paper). None of these products has yet published the kind of monthly third-party attestation regime, multi-year track record, or multi-billion-dollar market capitalization that characterizes PAXG or XAUT in gold; Chainlink’s own 2026 analysis of tokenized copper describes onchain liquidity as still low relative to traditional futures volume, warning of slippage risk for institutional-size orders until the market matures (Chainlink, Tokenized Copper: RWAs and the Future of Commodities, 11 Feb 2026).