What to Know

  • Endeavour Silver’s Terronera mine in Jalisco, Mexico, lost twelve days of operations after a peaceful blockade began on August 12 and was removed before operations resumed on August 24.
  • The Terronera disruption is estimated at about 0.08 million ounces of deferred silver production, based on second quarter output rates.
  • Peru’s metallic mining subsector contracted 2.52% in June, with silver output down 9.0% as lower tonnage and lower grades weighed on production.
  • Peru’s monthly equivalent silver shortfall is estimated at roughly 0.98 million ounces against its 2025 average monthly output rate of 10.88 million ounces.
  • Antofagasta cut 2026 copper guidance after severe rain and snow affected Los Pelambres in Chile, where silver appears as a by product rather than the main operating driver.
  • Mexico, Peru and Chile are central to global silver supply, with Mexico at 172.9 million ounces in 2025 and Peru at 130.6 million ounces.
  • The combined effect of the highlighted Mexican and Peruvian disruptions is about 1.1 million ounces, small against a forecast 46.3 million ounce silver deficit for 2026.
  • The broader issue for silver investors is supply inelasticity, because roughly three quarters of global silver comes from mines primarily built around copper, lead, zinc or gold.

Silver Disruptions Point to a Supply Response Problem

Silver investors received three separate reminders this month that higher prices do not automatically translate into higher mine supply. Mexico, Peru and Chile each reported or disclosed output setbacks, but none of the explanations centered on miners withholding metal in response to the silver price or rapidly expanding production because prices were stronger. Instead, the issues came from a local blockade, lower grades and tonnage, and weather related damage at a copper operation where silver is a by product.

That distinction matters because silver is not mined like a pure monetary metal across most of the global supply chain. A large share of production comes from operations designed around other metals, especially copper, lead, zinc and gold. When silver prices rise, that strength may improve revenue or provide a by product credit, but it often does not decide the mine plan, the daily tonnage moved, or the grade sequence being processed through concentrator plants.

Mexico’s Terronera Mine Lost Twelve Days

In Mexico, Endeavour Silver disclosed on August 16 that operations at Terronera in Jalisco had been suspended since August 12 because of a blockade by members of the nearby Ejido community. The stated concerns included road maintenance, assistance with medical services and communications, control of and access to water supply, and increased financial assistance. The blockade remained peaceful throughout the stoppage.

A reduced workforce stayed at the site for safety and security, while the property remained accessible for maintenance. On August 20, the company said negotiations were continuing in a cordial and respectful manner and that there had been no material change to operations. Three days later, Endeavour announced that the blockade had been removed, with operations resuming on August 24.

The event is now closed rather than open ended, allowing the production effect to be framed more concretely. The lost operating window ran from August 12 through August 23, a total of twelve days. In the second quarter, Terronera processed 175,729 tonnes of ore at 126 grams of silver per tonne and produced 608,347 ounces at a stated recovery of 85.4%. Those figures point to an estimated daily production rate of roughly 6,685 ounces across the 91 days of the quarter, placing the twelve day interruption near 0.08 million ounces.

There are two important caveats. Terronera is still ramping up, so the second quarter run rate may overstate what the mine would have delivered on a normal day during the interruption. At the same time, Endeavour had told investors that silver grades were in line with plan and were expected to rise through the rest of the year as mining reached higher grade areas. The most balanced reading is that the blockade deferred output rather than permanently removed underground ore from future supply.

Why Terronera Matters Beyond the Ounces

The estimated ounces affected in Mexico are modest. The significance lies in the asset and the country. Terronera achieved commercial production on October 1, 2025, less than a year before the stoppage, and supplied 31% of Endeavour’s consolidated silver output in the second quarter. Newer mines can still be building community relationships, permitting routines and local expectations, which may leave them exposed to disputes even when operations are technically progressing.

Mexico remains a cornerstone of global silver mine supply. Metals Focus and the Silver Institute put Mexican mine production at 172.9 million ounces in 2025, equal to 20.4% of world mine production, while also marking a third consecutive annual decline. That backdrop makes even small disruptions worth monitoring, not because one twelve day event changes the global balance by itself, but because it shows how local social and infrastructure concerns can interrupt supply in the world’s largest producing country.

Peru’s June Mining Data Show Grade Pressure

Peru’s statistics institute reported on August 15 that the metallic mining subsector contracted 2.52% in June compared with June 2025. Silver fell 9.0%, while zinc declined 25.8%, lead dropped 12.5%, copper slipped 4.7% and gold eased 1.1%. The institute attributed the result to lower tonnage extracted and lower grades of minerals treated at concentrator plants.

For silver, the order of the declines is crucial. Zinc fell nearly three times as much as silver, and zinc often governs the mine plan at Peruvian polymetallic operations. Peru is the second largest silver producing country at 130.6 million ounces, or 15.4% of global mine supply, but much of that silver is produced alongside zinc, lead and copper. In those operations, silver is valuable, but it is not always the metal that determines how the mine is run.

Against Peru’s 2025 average monthly rate of 10.88 million ounces, a 9.0% decline is equivalent to roughly 0.98 million ounces on a monthly equivalent basis. That should be treated as an estimate rather than a final measured tonnage loss, because the statistics institute publishes an index while the energy and mines ministry publishes actual fine kilogram production data. Still, the signal is clear enough: weaker ore grades and lower extracted tonnage can pull silver output down even when the silver price is supportive.

Chile’s Weather Shock Was Really a Copper Story

In Chile, the latest silver related signal came through copper producer Antofagasta. On August 13, the company cut its 2026 copper guidance to a range of 625,000 to 655,000 tonnes from 650,000 to 700,000 tonnes, a 5.2% reduction at the midpoint. The change followed severe rain and snow that forced an orderly shutdown at Los Pelambres, while the Chilean government declared a state of catastrophe in the Coquimbo Region.

Operations have resumed and are ramping, but inspections identified the need for repairs to certain pipeline platforms and water management systems. Management described snowfall of around five million cubic metres and said the mine is currently working lower grade zones, with higher grade ore expected later this year or in early 2027. Silver does not drive that operating explanation. It arrives with the copper and moves in response to the copper mine plan.

Antofagasta’s accounts show why silver is unlikely to determine production decisions at the group level. Silver represents 3% of group revenue, compared with copper at 77%, molybdenum at 10% and gold at 9%. Half year revenue rose 18% to $4,479.0 million, supported by higher realised prices that partly offset lower sales in copper and by products. For a by product metal, stronger prices can lift revenue even when physical sales volumes are softer.

Silver also appears on the cost side of the business. Net cash costs fell 8% to $1.22 a pound after stronger by product credits. In practical terms, higher silver and gold prices are subtracted from the cost of producing copper. That is useful for the operator, but it also reinforces the point that silver is not the central variable deciding how much ore is mined at a copper operation.

Small Immediate Impact, Larger Structural Message

The combined effect of the Mexican and Peruvian events is about 1.1 million ounces, made up of roughly 0.98 million ounces of monthly equivalent Peruvian output and about 0.08 million ounces at Terronera. That is small against the 46.3 million ounce silver deficit forecast for 2026 by Metals Focus and the Silver Institute. It represents 2.3% of that forecast shortfall, and the Mexican portion is best viewed as deferred production rather than permanent supply loss.

For near term pricing, the impact is mildly supportive but not decisive. The more important issue is the mechanism. A community stoppage in Mexico, a national production index in Peru and by product economics in Chile all point toward the same conclusion: silver supply is often constrained by factors that sit outside the silver price itself.

That matters in a market where primary silver mines accounted for a new low of 26% of global supply in 2025, while non primary output reached 625.5 million ounces. Roughly three quarters of global silver now comes from mines primarily developed for other metals. Those mines respond to the economics of the broader orebody, not simply to the standalone silver price.

Why Higher Prices May Not Quickly Unlock Supply

In many commodity markets, higher prices encourage producers to invest, expand and bring on new supply. Silver can behave differently because so much output is tied to the production decisions of other mining segments. A zinc mine may produce less silver if zinc grades fall or if zinc led economics weaken. A copper mine may generate more or less silver depending on copper throughput, weather disruptions, water systems, pipeline repairs or the sequencing of ore zones.

That helps explain why mine supply is forecast at 844.1 million ounces this year versus 846.6 million ounces last year, essentially flat, even though silver has traded well above the $40.03 average recorded in 2025. A higher price can strengthen margins, improve by product credits and support project economics, but it does not instantly change underground access, community relations, concentrator grades or the amount of copper and zinc ore being moved.

For holders, that inelastic supply base remains one of the structural arguments behind the longer term silver case. For market participants expecting producers to quickly solve deficits through higher mine output, the latest developments in Mexico, Peru and Chile offered a more cautious message. The silver price is important, but at many mines it is not the number management is primarily optimizing.

Frequently Asked Questions (FAQs)

What happened at Endeavour Silver’s Terronera mine?

Operations at Terronera in Jalisco, Mexico, were suspended after a peaceful blockade began on August 12. The blockade was removed before operations resumed on August 24, resulting in twelve lost production days.

How much silver production was affected in Mexico?

The estimated impact at Terronera is about 0.08 million ounces, based on second quarter production rates. Because underground ore remains in place, the disruption is best viewed as deferred output rather than permanently lost supply.

Why did Peru’s silver output fall in June?

Peru’s statistics institute attributed the broader mining decline to lower tonnage extracted and lower grades at concentrator plants. Silver fell 9.0% in June, while zinc, lead, copper and gold also declined.

How important is Peru to global silver supply?

Peru is the second largest silver producing country, with 130.6 million ounces and 15.4% of global mine supply. Much of its silver is produced alongside zinc, lead and copper rather than from mines built only for silver.

Why does Chile matter for silver if the issue was copper guidance?

Chile matters because silver can be produced as a by product of copper mining. At Antofagasta, silver is a small share of revenue, so copper operations and copper mine planning have a larger influence on how much associated silver is produced.

Was the silver price responsible for these disruptions?

No. The Mexican issue involved community concerns, Peru’s decline reflected lower tonnage and lower grades, and Chile’s disruption followed severe weather at a copper operation. None of these were presented as direct responses to the silver price.

Is the near term supply impact large enough to move the market?

The combined Mexican and Peruvian impact is estimated at about 1.1 million ounces, compared with a forecast 46.3 million ounce deficit for 2026. That is not a market moving quantity on its own, but it is relevant as part of a broader supply pattern.

What is by product silver production?

By product silver production occurs when silver is recovered from mines primarily operated for other metals such as copper, lead, zinc or gold. In those cases, silver output depends heavily on the economics and operating plans of the main metal.

What is the main takeaway for silver investors?

The main takeaway is that silver mine supply may remain slow to respond to higher prices because much of it is tied to other metals, local operating conditions, ore grades and infrastructure constraints.

Photo by Zlaťáky.cz on Pexels