Big Global Miners’ copper valuation and growth optionality: Diversified miners are still valued more for iron ore than for their embedded copper growth, with execution the route to a copper-led re-rating.

Overview

This industry report assesses how much copper value equity markets embed in BHP, Vale, Rio Tinto and Glencore. BofA concludes that investors are increasingly recognizing copper’s near-term earnings contribution, especially through EV/EBITDA, but most companies still receive limited credit for longer-term copper optionality under P/NAV.

Core views

BofA applies a reverse-valuation framework to estimate the copper price required to reconcile each diversified miner’s current equity value with its own historical trading multiples. It uses six-year average P/NAV and EV/EBITDA multiples for the recent valuation environment, alongside 12-year P/NAV and 14-year EV/EBITDA averages as through-the-cycle references. Holding BofA operating assumptions constant, copper is the balancing variable. The resulting figures are valuation-equivalent copper prices, not copper-price forecasts; they are also affected by assumptions for iron ore and other commodities because diversified miners have multi-commodity portfolios. The broad conclusion is that diversified miners do not receive full credit for copper exposure. On P/NAV, their implied copper prices are on average 9% below spot and 6% below copper pure plays; on EV/EBITDA, the respective average discounts are 5% and 3%. Recent six-year multiples show some improvement in the value investors assign to copper, most visibly through earnings-based EV/EBITDA, but P/NAV still points to limited recognition of long-term copper growth. This reflects the continued influence of iron ore, coal, marketing and other businesses on group valuations. BHP is the principal exception. Its P/NAV-implied copper price falls from about US$18,700/t using the 12-year average to about US$17,000/t using the six-year average, but remains above spot and pure-play averages. Its EV/EBITDA-implied price rises from about US$14,800/t to about US$18,500/t, moving from a 4% premium to spot to a 30% premium. BofA links this re-rating to copper representing 54% of BHP’s FY26 underlying EBITDA and to improved confidence in operating delivery and long-term copper growth. It views BHP as best positioned for short-term visibility because of its existing scale and projects including Resolution, Vicuña and expansions at current operations. Vale’s results split between near-term earnings recognition and long-term skepticism. Its P/NAV-implied copper price declines from about US$13,300/t to about US$11,000/t, staying below spot and pure-play averages, which BofA associates with Vale’s iron-ore orientation and investors’ past doubts about copper-project delivery. Conversely, its EV/EBITDA-implied price rises from about US$12,900/t to about US$14,400/t, improving from a 9% discount to spot to broadly in line with spot. BofA attributes this to Vale Base Metals’ expected increase from 10% of consolidated EBITDA in 2024 to around 30% in 2026. The report sees Vale as offering the largest relative re-rating opportunity if it can convert its broad, lower-capital-intensity Carajás brownfield pipeline into sustained production, cash flow and asset value; management targets annual copper production of 700kt by 2035. Rio Tinto shows gradual improvement in both methods, although its valuation remains dominated by iron ore. Its P/NAV-implied copper price rises from about US$9,800/t to about US$11,800/t, narrowing the discount to spot from about 31% to 17%. Its EV/EBITDA-implied price increases from about US$13,000/t to about US$13,700/t, reducing the discount from about 8% to 4%. BofA views this as evidence that copper is gaining recognition, but says a more substantial re-rating requires copper to become a larger and more visible portfolio contributor. Rio controls major opportunities, but growth is concentrated in fewer assets, including longer-dated projects such as Resolution and La Granja. Glencore’s EV/EBITDA-implied copper price improves from about US$14,800/t to about US$15,200/t, increasing its premium to spot from about 4% to 7%, indicating greater market recognition of copper’s near-term earnings contribution. However, its P/NAV-implied price stays near US$13,100/t under both reference periods, around 7% below spot. BofA attributes the difference partly to the complexity of Glencore’s mining, coal and marketing mix, which makes copper’s long-term value less directly visible. Projects including MARA and El Pachón retain meaningful optionality, but the path to near-term production growth is less defined. BofA argues that current output and earnings exposure understate embedded copper optionality. Using an EV-per-tonne-of-capacity reference for high-quality, C1-cost-position copper businesses of roughly US$100,000 per tonne of annual capacity, it estimates BHP’s attributable copper business, at about 1.4Mtpa, could be worth approximately US$157bn–US$191bn; Anglo copper, at about 600ktpa, US$56bn–US$69bn; and Glencore copper, at about 870ktpa, US$76bn–US$92bn. The report notes that divesting non-copper assets, as Teck and Anglo American have illustrated, may provide one route to releasing this hidden value. An illustrative long-term revenue-mix exercise, using current spot prices and company production guidance to isolate volume effects, suggests most portfolios would not be transformed by identified copper growth. BHP’s copper revenue contribution rises only about 2 percentage points to 51%; Glencore’s rises from 21% to 23%; and Rio Tinto’s declines from 24% to 18% as other businesses grow faster. Vale is the exception: copper could increase from 14% to about 21% of revenue if long-term targets are delivered. Across the group, BofA identifies project execution—not project availability—as the decisive catalyst. Feasibility studies, permitting progress, construction approvals and first production would provide the evidence investors need before assigning greater value to long-dated copper optionality.

Analysis framework

BofA first derives implied copper prices by applying each miner’s own historical P/NAV and EV/EBITDA multiples to current equity valuations while holding its operating assumptions constant. It compares recent and through-the-cycle valuation windows, benchmarks results against spot copper and pure-play copper producers, then examines earnings and revenue mix, project pipelines, timing and execution visibility to assess which companies may earn greater copper valuation recognition.

Methodology notes

• Valuation methodsP/NAV Resources and Real Estate Valuation

  Reverse P/NAV valuation using each company’s 6-year and 12-year historical P/NAV multiples.

  The analysis calculates the copper price that would make current equity values consistent with historical NAV multiples, helping assess how much long-term copper asset value the market recognizes.

• Valuation methodsEV/EBITDA valuation

  Reverse EV/EBITDA valuation using 6-year and 14-year historical multiples and BofA 2027E costs and volumes.

  This earnings-based approach derives a valuation-equivalent copper price and is more responsive to changes in near-term commodity mix and copper’s contribution to earnings.

• Industry AnalysisVolume-price decomposition

  Illustrative long-term revenue-mix analysis using current spot prices and production guidance.

  By holding prices at spot and changing production volumes, BofA isolates how future copper output could alter each miner’s commodity revenue mix.

• Valuation methodsDCF (Discounted Cash Flow)

  Company price objectives use DCF-derived NPV with stated discount rates, WACC and terminal-growth assumptions.

  The report’s company valuation disclosures use discounted future cash flows and NPV multiples as price-objective bases for the covered miners.

Asset mapping & comparison

Structured mapping from thesis to named assets (strengths, weaknesses, peers, risks).

• BHP Group Limited

  The report identifies BHP as the diversified miner with the greatest current copper valuation recognition and strongest short-term project visibility.

  Strengths

  Copper contributed 54% of FY26 underlying EBITDA; implied copper prices are above spot and pure-play averages; Resolution, Vicuña and operating expansions support project visibility.

  Weaknesses

  Much long-term copper value already appears incorporated into NAV.

  Comparison

  Screens closer to premium copper producers such as Anglo American, Antofagasta and Southern Copper under recent EV/EBITDA valuation.

  Risks

  Commodity-price volatility, mining operational risk, project execution, currency pressure and cost inflation.

• Vale

  The report sees Vale as having the largest relative copper-growth and re-rating opportunity if its brownfield pipeline is delivered.

  Strengths

  Broad Carajás brownfield pipeline, improving operating execution, highest copper production since 2018 in 2025, and expected growth in Vale Base Metals’ EBITDA contribution.

  Weaknesses

  P/NAV still assigns limited value to long-term copper optionality; past project progress has reduced investor confidence.

  Comparison

  Vale is the main company for which identified copper growth could materially raise revenue mix, from 14% to about 21%.

  Risks

  Weaker iron ore prices, global slowdown, Brazilian real and Canadian dollar appreciation, freight costs, government intervention and further Brumadinho-related fallout.

• Rio Tinto

  Copper is gaining valuation recognition, but BofA says Rio remains primarily valued as an iron ore producer.

  Strengths

  P/NAV and EV/EBITDA implied copper prices both improve; it controls world-class copper opportunities.

  Weaknesses

  Future copper growth is concentrated in fewer assets and several major opportunities are longer dated.

  Comparison

  Its improvement is positive but still below copper pure-play averages and less complete than BHP’s re-rating.

  Risks

  Lower commodity prices, unsuccessful project execution and operational problems at mines and smelters.

• Glencore

  The report finds greater valuation recognition for copper’s near-term earnings than for its long-term portfolio optionality.

  Strengths

  Meaningful optionality through MARA, El Pachón and Collahuasi expansions; EV/EBITDA-implied copper price is above spot.

  Weaknesses

  Complex mining, coal and marketing activities obscure copper’s standalone value; near-term production-growth path is less defined.

  Comparison

  Unlike its improving EV/EBITDA signal, its P/NAV-implied copper price remains broadly unchanged and below spot.

  Risks

  Commodity-price deviations, trading-profit variation, cost-savings execution, operational surprises and changes in the market value of listed assets.

Key data

• Diversified-miner implied copper discount on P/NAV9% below spot; 6% below copper pure-play averageAverage discount across diversified miners.
• Diversified-miner implied copper discount on EV/EBITDA5% below spot; 3% below copper pure-play averageAverage discount across diversified miners.
• BHP copper contribution54% of FY26 Underlying EBITDASupports BHP’s premium implied-copper valuation.
• BHP recent EV/EBITDA-implied copper priceApproximately US$18,500/tAbout 30% above spot using the six-year average multiple.
• Vale recent P/NAV-implied copper priceApproximately US$11,000/tBelow spot and the pure-play average using the six-year average multiple.
• Vale Base Metals EBITDA contributionAround 30% in 2026 versus 10% in 2024Management expectation cited as evidence of growing near-term earnings relevance.
• Rio Tinto recent P/NAV-implied copper priceApproximately US$11,800/tNarrows the discount to spot to approximately 17% from 31% on the 12-year reference.
• Glencore recent EV/EBITDA-implied copper priceApproximately US$15,200/tAbout 7% above spot using the six-year average multiple.
• Vale long-term copper target700kt annual production by 2035Potential growth path that is not fully reflected in base-case market expectations.

Impact & implications

The report says higher copper prices alone are unlikely to close the valuation gap. Greater recognition requires evidence that copper growth projects can become delivered production, earnings, cash flow and incremental asset value. BHP already reflects this dynamic most clearly, while Vale has the greatest relative re-rating potential if its execution improves; Rio Tinto and Glencore need clearer visibility on copper’s portfolio contribution.

Risks

• Global economic slowdown and weaker commodity prices could reduce earnings and valuation support.
• Mining operational problems, cost inflation and currency pressure could impair delivery and cash flow.
• Copper-project execution risk is central because long-term valuation recognition depends on converting pipelines into production.
• For Vale, higher freight costs, government intervention and further Brumadinho-related fallout are stated downside risks.

What to watch

• Progress on feasibility studies, permitting, construction approvals and first production at copper projects.
• Vale’s Carajás brownfield delivery and progress toward its potential 700kt annual copper-production path by 2035.
• BHP’s delivery of Resolution, Vicuña and existing-operation expansions.
• Timing and advancement of Rio Tinto’s concentrated pipeline, including Resolution and La Granja.
• Glencore’s progress at MARA, El Pachón and Collahuasi expansions.
• Whether copper’s share of earnings, cash flow and revenue becomes sufficiently visible to narrow valuation discounts versus pure plays.