Copper World (Extension Case) PFS: $2.51B NPV, 18.8% IRR
Hudbay Minerals Inc.'s Copper World (Extension Case) in United States, Arizona (approx. 50 km southeast of Tucson) has a Pre-Feasibility Study (PFS) outlining an after-tax NPV of $2.51B, an after-tax IRR of 18.8%, and initial capital of $2.07B. The mine plan runs 37 years at about 102000 t Cu (yrs 1-10 avg 101kt; yrs 11-20 117kt; LOM avg 89kt) per year.
Hudbay Minerals Inc.'s Copper World (Extension Case) has reported Pre-Feasibility Study (PFS) results for the copper project in United States, Arizona (approx. 50 km southeast of Tucson). The study headlines an after-tax net present value of $2.51B at a 8% discount rate. It reflects Hudbay Minerals Inc.'s (HBM) latest disclosed economics for the asset.
Economics. The after-tax NPV is $2.51B using a 8% discount rate. After-tax IRR is 18.8%. Initial capital expenditure is estimated at $2.07B. The study models a payback period of 5.4 years. All-in sustaining costs are pegged at 2.38 USD/lb Cu (LOM sustaining cash cost); LOM cash cost $1.94/lb. Economics are based on Long-term copper $5.00/lb; molybdenum $17.50/lb; gold stream $540/oz; silver stream $6.75/oz (same as Base Case).
Production and mine plan. The project envisions an open-pit operation. Life of mine is 37 years. Average annual production is approximately 102000 t Cu (yrs 1-10 avg 101kt; yrs 11-20 117kt; LOM avg 89kt).
Resources and ownership. Mineral resources: M&I (inclusive of reserves): 1,236 Mt at 0.40% Cu; Extension Case utilizes M&I resources totalling 1,048 Mt. The company holds a 70% interest in the project. Royalties and streams: Wheaton precious metals stream: $230M deposit for 92.5% of gold and silver contained in production, plus up to $70M additional deposit; ongoing payments 15% of spot. 30% JV partner Mitsubishi..
These figures are extracted from Hudbay Minerals Inc.'s technical disclosures and reflect the most recent PFS 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.
Our Analysis
- IRR after-tax
- 18.8%
higher than 32% of 38 projects we track
- NPV after-tax
- $2.51B
higher than 82% of 45 projects we track
- Initial capex
- $2.07B
82% of NPV
costlier than 66% of 47 projects we track
- Payback
- 5.4yrs
slower than 89% of 36 projects we track
- Mine life
- 37yrs
- Discount rate
- 8%
- Study price assumption
- Long-term copper $5.00/lb; molybdenum $17.50/lb; gold stream $540/oz; silver stream $6.75/oz (same as Base Case)
- Spot copper today
- $6.58/lb
Against the 38 copper projects we track, this one's 18.8% after-tax IRR lands in the lower half, ahead of only about a third of them. That is a middling return for a development asset, and it sits close enough to the roughly 15% after-tax threshold developers typically need to attract project finance that the margin is thin rather than comfortable. The after-tax NPV of $2.51B ranks far better, higher than 82% of the 45 projects we track, but that figure rests on a long 37-year mine life and a 5.4-year payback that is slower than all but a handful of peers (lower than 89% of the 36 we track). Long life and slow capital recovery pull in opposite directions: the NPV is large because the cash flows run for decades, not because the early years are strong.
The funding picture is the reassuring part. Initial capex of $2.07B is about 0.2x the company's US$10.51B market cap, and at 82% of NPV the build is moderately capital-intensive but well within the reach of a large-cap with 11 projects in its portfolio. This is not a single-asset developer that has to finance a build several times its own equity value. The NPV-to-market-cap ratio of roughly 0.2x cuts both ways: it can mean the asset is not yet reflected in the share price, or that the market is discounting the study, the timeline or the jurisdiction. Arizona is a mining-friendly address, which helps, but it does not resolve that ambiguity on its own.
Weigh the stage. This is a pre-feasibility study, with estimates still inside a plus or minus 25% band and no build decision made. The study assumes $5.00/lb copper against a live spot of $6.58/lb, so the returns carry real upside if that price holds, though a PFS is not the document to bank on. The question that decides this project is whether the modest IRR and slow payback can be lifted toward the financing threshold before the feasibility work is complete.
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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