Industry Notes / Mining: copper over iron / Chapter 8 of 8 · Thesis cards
Five signals that would break the view
Keep the narrative, but re-rate when these lights turn on
AI pipeline fails to deliver
Transformers and switchgear are the bottleneck. If 2027 delivery worsens, the marginal-buyer story cracks.
One of the key downside lights on copper demand.
Section 232 is rejected
COMEX–LME arb unwinds, US stocks re-enter the world, balances loosen fast.
Implied odds that a 30% tariff never lands are not small.
Gold falls
Negative or tiny copper cash costs lean on gold credits.
Gold down → copper cost curve up → margins compress.
Iron ore accelerates lower
Simandou ramps faster than expected and China property retests the bottom.
Iron ore through about $80 can erase copper’s price gains.
Volumes down, costs up
Higher prices need not mean higher profit.
The sharpest gap between liking copper and liking copper equities.
Falsification is concrete: AI build-out delivery, tariff rulings, gold, iron ore below key levels, and volume-down/cost-up. Five monthly checks are enough.
Source：Wood Mackenzie 数据中心在建比例；232 条款市场隐含概率；BHP FY27 产量与成本指引
Research notes, not investment advice.