Copper World Feasibility Study: $1.24B NPV, 16.8% IRR
Hudbay Minerals Inc.'s Copper World in Arizona, United States (approx. 50 km southeast of Tucson) has a Feasibility Study outlining an after-tax NPV of $1.24B, an after-tax IRR of 16.8%, and initial capital of $2.07B. The mine plan runs 15 years at about 102000 t Cu (avg years 1-10) per year.
Hudbay Minerals Inc.'s Copper World has reported Feasibility Study results for the copper project in Arizona, United States (approx. 50 km southeast of Tucson). The study headlines an after-tax net present value of $1.24B at a 8% discount rate. It reflects Hudbay Minerals Inc.'s (HBM) latest disclosed economics for the asset.
Economics. The after-tax NPV is $1.24B using a 8% discount rate. After-tax IRR is 16.8%. Initial capital expenditure is estimated at $2.07B, with life-of-mine sustaining capital of $32M. The study models a payback period of 5.4 years. All-in sustaining costs are pegged at 2.22 USD/lb Cu (sustaining cash cost, years 1-10). Economics are based on Long-term copper $5.00/lb ($5.50/lb in year 1 and $5.13/lb in year 2), gold stream price $540/oz (15% of market), silver stream price $6.75/oz (15% of market), molybdenum $17.50/lb; resource estimate assumptions: Cu $5.00/lb, Mo $20.00/lb, Au $3,600/oz, Ag $50.00/oz. Sensitivity at $4.50-$6.50/lb Cu..
Production and mine plan. The project envisions an open-pit operation. Life of mine is 15 years. Average annual production is approximately 102000 t Cu (avg years 1-10). Average head grade is 0.47% Cu (reserves); 103 g/t Mo, 0.023 g/t Au, 5.08 g/t Ag. The open-pit strip ratio is 1.5.
Resources and ownership. The company holds a 70% interest in the project. Royalties and streams: Wheaton precious metals stream: $230M deposit + $70M contingent expansion payment for 92.5% of gold and silver, ongoing payments at 15% of spot; JV with Mitsubishi (30%).
These figures are extracted from Hudbay Minerals Inc.'s technical disclosures and reflect the most recent Feasibility Study on file. Compare this project against other developers and producers in our project economics database, and always verify the numbers against the original technical report before making any investment decision.
Reserves & Resources
| Category | Tonnage | Grade | Contained |
|---|---|---|---|
| Proven | 330 Mt | 0.47% Cu, 105 g/t Mo, 0.024 g/t Au, 5.25 g/t Ag | — |
| Probable | 60 Mt | 0.46% Cu, 94 g/t Mo, 0.018 g/t Au, 4.14 g/t Ag | — |
| Total Proven and Probable Reserves | 390 Mt | 0.47% Cu, 103 g/t Mo, 0.023 g/t Au, 5.08 g/t Ag | — |
| Category | Tonnage | Grade | Contained |
|---|---|---|---|
| Measured (inclusive of reserves) | 890 Mt | 0.42% Cu, 124 g/t Mo, 0.022 g/t Au, 4.43 g/t Ag | — |
| Indicated (inclusive of reserves) | 347 Mt | 0.35% Cu, 109 g/t Mo, 0.015 g/t Au, 3.32 g/t Ag | — |
| Total Measured and Indicated (inclusive of reserves) | 1,236 Mt | 0.40% Cu, 120 g/t Mo, 0.020 g/t Au, 4.12 g/t Ag | 4,993 kt Cu |
| Inferred | 309 Mt | 0.30% Cu, 103 g/t Mo, 0.012 g/t Au, 2.69 g/t Ag | 927 kt Cu |
Our Analysis
- IRR after-tax
- 16.8%
higher than 28% of 40 projects we track
- NPV after-tax
- $1.24B
higher than 62% of 47 projects we track
- Initial capex
- $2.07B
167% of NPV
costlier than 66% of 50 projects we track
- Payback
- 5.4yrs
slower than 89% of 38 projects we track
- Mine life
- 15yrs
- Discount rate
- 8%
- Study price assumption
- Long-term copper $5.00/lb ($5.50/lb in year 1 and $5.13/lb in year 2), gold stream price $540/oz (15% of market), silver stream price $6.75/oz (15% of market), molybdenum $17.50/lb; resource estimate assumptions: Cu $5.00/lb, Mo $20.00/lb, Au $3,600/oz, Ag $50.00/oz. Sensitivity at $4.50-$6.50/lb Cu.
- Spot copper today
- $6.46/lb
Against the 40 copper projects we track, this one's 16.8% after-tax IRR lands in the lower half, ahead of only 28% of them. That is the number to hold onto, because it sits just above the roughly 15% developers typically need to clear project finance. A return that close to the financing line is not a margin of safety; it is a pass, and a thin one. The NPV ranks better, higher than 62% of the 47 projects we track, but the 5.4-year payback ranks lower than 89% of the 38 we compare, so the value is back-loaded. For an investor, the rank says this is a fundable but unremarkable copper story whose merit rests on execution rather than headline economics.
The constraint that matters is not the return, it is the build. Initial capex of $2.07B is 167% of NPV, and while that ranks lower than 34% of the 50 copper projects we track, the sharper point is scale: the build is about 0.2x a US$10.66B market cap. That is a large, diversified company with 13 projects in our tracking, so a $2.07B commitment is absorbable rather than transformative, and the NPV at roughly 0.1x market cap tells you the market treats this as one asset among many, not a re-rating event. The two-sided read on that gap: either the asset is under-appreciated, or the market is discounting development, permitting and copper-price risk. Both are plausible.
This is a feasibility study, the build-ready estimate with a plus or minus 15% band, so the figures deserve more weight than a scoping PEA would earn. Arizona is a mining-friendly jurisdiction, which helps. The study assumes $5.00/lb long-term copper against a live spot of $6.46/lb, so there is price upside embedded in the sensitivity range up to $6.50/lb, though the returns should be judged on the base case, not the spot. The single question: can a 16.8% IRR, barely over the financing line and slow to pay back, carry a $2.07B build through to production without the assumptions slipping?
Our take, benchmarked against the project economics in the Mining Stocks database. Figures are estimates drawn from company technical reports — not investment advice; always verify against the source filing.
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