Silver Depends on Two Metals That Just Fell - Investorideas.com

AI desk brief

Silver supply is increasingly constrained by base-metals mining decisions, not by dedicated silver output. The article argues that roughly three-quarters of mined silver is a byproduct of lead and zinc operations, so the recent drop in zinc and lead mine production in H1 2026 has direct implications for silver availability. Spot silver was cited at $66.56/oz at the end of August after a roughly 16% monthly gain, then eased to $63.96/oz on Sept. 1 as rate-hike expectations firmed, but the supply backdrop remains supportive.

The key data point is the International Lead and Zinc Study Group’s first-half 2026 print: global zinc mine output fell 2.6% and lead mine output fell 3.0%, reversing earlier growth. The piece highlights Antamina in Peru, where zinc output dropped 62% last quarter because the mine plan shifted toward copper ore, taking associated silver with it. It also cites the World Silver Survey 2026 and Metals Focus data showing only 26.1% of mined silver comes from primary silver mines, with lead-zinc mines contributing 249.1 Moz.

Near term, the market implication is that silver supply is less elastic than headline price action suggests, especially when zinc treatment charges and base-metals economics drive mine plans. Chinese zinc concentrate treatment charges reportedly hit a record low near -$117.50/dry tonne in August versus an $85 benchmark, underscoring stress in the processing chain and the importance of byproduct credits. That keeps the medium-term bias constructive for silver, even if rate expectations create short-term volatility.