According to market sources, Chilean miner Antofagasta has recently proposed to several major Chinese copper smelters that mid-year copper concentrate contracts be priced using spot-market TC/RC indexes rather than the traditional fixed benchmark TC/RC structure. Since the 1980s, annual benchmark treatment and refining charges (TC/RCs) have been established through negotiations between leading miners and smelters, serving as a reference point for copper concentrate contracts worldwide. However, the benchmark system is facing growing pressure as global copper concentrate supply tightens, smelting capacity continues to expand, and spot TC/RCs fall to unprecedented lows. As of June 12, 2026, the SMM Imported Copper Concentrate Index had declined to a record low of -US$119.84/mt. If more miners move toward index-linked pricing mechanisms, the long-standing benchmark TC/RC pricing system could face a fundamental shift.

South America remains the cornerstone of global copper supply, with Chile and Peru collectively accounting for more than one-third of global mined copper production. As electrification, grid modernisation, renewable energy deployment and AI-driven infrastructure investment continue to reinforce long-term copper demand growth, policy developments across the region are becoming increasingly important determinants of future supply availability.

As the United States continues to strengthen critical minerals security, domestic manufacturing, and copper supply chain resilience, limited smelting capacity is increasingly emerging as a key challenge. The country currently operates only a handful of primary copper smelters, while low treatment and refining charges (TC/RCs) and rising environmental compliance costs continue to pressure profitability. Alongside efforts to expand domestic mining and manufacturing capacity, maintaining existing smelting operations and securing refined copper supply will remain critical to the long-term success of U.S. copper supply chain strategy. Continued pressure on the smelting sector could limit the country's ability to reduce reliance on imported refined copper in the near term.

On May 28, JX Advanced Metals, Mitsubishi Materials (MMC), Mitsui Kinzoku, and Marubeni signed a final agreement to integrate MMC’s copper concentrate procurement and sales of cathode copper, sulfuric acid, and other by-products into Pan Pacific Copper (PPC), while establishing a wholly-owned subsidiary, "PPC Material." The integration will be executed via a company split: PPC first absorbs the target business, then transfers it to the newly established PPC Material on the same day. Originally planned for end-March, the process was delayed by about two months due to detailed discussions. Post-integration, PPC’s ownership stands at: JX 32.50%, MMC 32.00%, Mitsui Kinzoku 21.90%, and Marubeni 13.60%. PPC becomes an equity-method affiliate of all four companies, with PPC Material as its wholly-owned subsidiary. Currently, PPC subcontracts smelting/refining to JX Metal Smelting and Hibi Smelting; after the deal, MMC will also become a subcontractor. Japan’s copper concentrate procurement windows will shrink from three to two, held by Sumitomo Metal Mining and PPC Material. The move aims to counter intensifying overseas competition and sharply deteriorated TC/RC through centralized procurement and cost efficiency. The transaction is planned for October 1, 2026, pending regulatory approvals.

[SMM Analysis] Can Indonesia import sulfuric acid as a substitute after the sulfur restriction?

[SMM Analysis]: Copper-related Policy Shifts Across the Americas: Copper is no longer merely an industrial metal — it is rapidly emerging as a strategic resource. From mining policy reforms in Chile and Peru, to the U.S. Section 232 investigation and the strengthening of North American critical minerals strategies, copper policies across the Americas in 2025–2026 are set to exert profound influence over global copper supply-demand balances, smelting dynamics, and copper price volatility.