International Copper Study Group (ICSG) said the global refined copper market posted a supply deficit of 51k tonnes in July 2026

A shortfall in the tens of thousands of tonnes is small against total refined output and is rarely market-moving on its own; what has historically mattered is the direction of the cumulative balance over consecutive months and whether deficits persist or flip. The tells that have tended to confirm or contradict these balances are treatment and refining charges, which tighten when concentrate is scarce relative to smelter capacity, and visible exchange inventories across the LME, SHFE and Comex systems, which reveal whether a paper deficit is showing up in physical stocks. A refined deficit driven by smelter disruption behaves differently from one driven by concentrate shortage at the mine level: the former is often temporary, the latter feeds through to TC/RCs and can persist. Follow-ons are the next ICSG revision, exchange stock movements, and Chinese import and premium data as the marginal buyer.