Sprott is a Toronto-headquartered asset manager specializing in precious metals and critical materials (NYSE/TSX: SII), tracing its roots to Sprott Securities founded by Eric Sprott in 1981 and now led by CEO Whitney George. It runs physical gold, silver and uranium trusts, ETFs, active strategies and resource lending, with about $65bn in AUM. The Insights column carries monthly commentaries and white papers on uranium, gold, silver, copper and critical materials by Paul Wong, Jacob White and John Hathaway (ex-Tocqueville gold manager) — note the house's structurally bullish commodity stance, as it sells the corresponding trusts and ETFs.
This report explains why copper and copper mining stocks are worth watching. Demand for copper is shifting from construction and cars to essential uses like power grids, AI data centers, and defense—things that keep buying regardless of price. At the same time, conflict in the Middle East and a Chinese export ban on sulfuric acid (a key input for some copper production) are tightening supply. That makes copper prices more likely to rise than fall. Mining stocks, especially smaller ones, more than doubled in the past year, but they're volatile. If you believe in the long-term electrification trend, a small position could make sense, but watch out for short-term shocks.
Sprott Research notes that after a sharp correction in March due to the US-Iran war and the closure of the Strait of Hormuz, copper prices rebounded strongly in April to $12,911 per ton (up 5.34% month-over-month), approaching historical highs. The core thesis is that copper demand is shifting from
This chapter focuses on the strong rebound in copper prices in April 2026 following geopolitical shocks, as well as the shift in the copper market's fundamentals from cyclical to structural drivers. The report notes that the escalation of the US-Iran war in March and the closure of the Strait of Hormuz triggered a sharp correction in copper prices, but prices quickly recovered in April, rising 5.34% month-on-month to $12,911 per ton, approaching historical highs. The market is gradually differentiating a true assessment of copper fundamentals from the cycle of geopolitical panic and relief.
The author's core investment argument is that copper demand is shifting from traditional cyclical drivers to structural ones, with electrification, energy security, and strategic infrastructure becoming the dominant forces behind demand growth. This makes copper prices less sensitive to traditional economic cycles and more sensitive to policy support and supply constraints. The counterintuitive judgment is that the US-Iran war is not directly bearish for copper miners; instead, the resulting tightness in diesel and sulfuric acid supply could become a supply-side constraint supporting copper prices.
1. Shift in Demand Structure: By 2040, strategic uses (defense, AI data centers, energy transition) will account for 45% of total copper demand, compared to 32% in 2024. This demand is highly price-inelastic—grid modernization will not be delayed by high copper prices, AI data center construction does not depend on copper pricing, and defense procurement will not be postponed due to rising copper costs.
2. Financial Buffer for Miners: The global copper mining industry currently has its strongest financial position in recent years, with robust profit margins and balance sheets sufficient to absorb long-term energy cost increases. Diesel typically accounts for 15%-25% of all-in sustaining costs (AISC) for open-pit copper mines (which represent the majority of global production), but miners have the capacity to absorb this pressure.
3. Escalating Supply-Side Risks: The sulfuric acid market and trade flows, affected by geopolitical conflicts and Chinese policies, are becoming a supply constraint. Diesel shortages have already limited copper supply in regions such as Zambia.
4. Price Performance Comparison (as of April 30, 2026):
| Indicator | 1 Month | 3 Months | Year-to-Date | 1 Year | 3 Years | 5 Years |
|---|---|---|---|---|---|---|
| Copper Spot Price | 5.34% | -1.20% | 3.67% | 41.59% | 14.61% | 5.61% |
| Copper Miners (Nasdaq Sprott Copper Miners Index TR) | 5.76% | -7.83% | 7.56% | 98.75% | 27.46% | 13.80% |
| Junior Copper Miners (Nasdaq Sprott Junior Copper Miners Index TR) | 7.98% | -12.54% | 5.11% | 115.75% | 38.82% | 19.05% |
| Commodities (BCOM Index) | 3.89% | 16.41% | 28.10% | 39.22% | 10.43% | 9.23% |
| US Stocks (S&P 500 TR Index) | 10.49% | 4.19% | 5.70% | 31.05% | 21.67% | 13.13% |
This chapter does not mention specific company names, primarily analyzing the overall performance of copper mining stocks:
1. Go Long on Copper and Copper Miners: With tightening supply combined with persistent demand supported by policy, the risk-reward ratio is favorable. Copper miners have outperformed other asset classes over the past five years, and this trend may continue.
2. Focus on Junior Copper Miners: These offer higher volatility but greater upside leverage, suitable for investors with a higher risk tolerance.
3. Be Wary of Short-Term Volatility from Geopolitical Risks: News related to the Strait of Hormuz can trigger two-way trading, but with fundamental support, pullbacks may present buying opportunities.
4. Monitor the Impact of Diesel and Sulfuric Acid Supply on Miner Costs: Although miners have a buffer, rising costs could further tighten supply, indirectly supporting copper prices.
This chapter focuses on how the copper mining industry’s currently extremely high profitability and geopolitical conflicts (US-Iran war, closure of the Strait of Hormuz) are reshaping the copper market landscape from both the demand and supply sides. The report argues that during the March correction, the market overemphasized the cost inflation risks triggered by war, while overlooking the structural resilience of industry profitability and the long-term structural support for copper demand from geopolitical factors.
1. Industry Profitability Data
| Indicator | Data |
|---|---|
| Share of profitable mines at current copper price | 99% (AISC below spot price) |
| Median copper mine AISC margin | 55% ($0.55 retained per dollar of revenue) |
| Share of mines consistently profitable since 2020 | 90% (spanning multiple commodity cycles and macro shocks) |
| Industry margin status | At an all-time high (supported by copper price, by-product revenue from gold and silver, and negative TC/RC) |
2. Geopolitical Factors Reshaping Demand
3. Sulfuric Acid Shortage as a Supply Constraint
This chapter focuses on the extreme fluctuations in the core economic indicator of the copper smelting industry—treatment charges (TC)—and how sulfuric acid, as a by-product, has become the "lifeline" sustaining smelter operations. The report notes that the benchmark TC fell to zero for the first time in 2026, while spot TC turned deeply negative, revealing extreme tightness in the copper concentrate market. By-product revenue, particularly from sulfuric acid, has emerged as a critical variable supporting smelter survival.
The author's central judgment is that negative TC has completely shifted from a "source of revenue" to a "direct cost," but high prices for by-products (gold, silver, sulfuric acid) have temporarily rescued smelters. The counterintuitive point is that despite deeply negative TC, Chinese smelters maintained positive cash margins as of April 2026, relying entirely on surging domestic sulfuric acid prices and free metal revenues. However, if China's sulfuric acid export ban causes domestic prices to fall, this "lifeline" could be severed, potentially triggering smelter production cuts and further tightening refined copper supply.
Comparative Data Table: Spot TC Changes
| Time Point | Spot TC ($/dmt) | Description of Change |
|---|---|---|
| End of 2023 | > 90 | Industry normal level |
| Early 2025 | Turned negative | First entry into negative territory |
| February 2026 | -51.11 | Continued deterioration |
| March 2026 | -66.10 | Iran conflict accelerated decline |
| Late April 2026 | -80.35 | Fell another 57% in two months |