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FTSE 100 miners fall as record Chinese copper output swells stockpiles

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FTSE 100 miners fall as record Chinese copper output swells stockpiles

Chinese smelters are forecast to produce almost 1.2 million tonnes of refined copper this month, a 4.6% increase from February and a record high for the survey, with year-to-date output up 10%, swelling stockpiles and threatening recent copper price gains. The prospect of higher supply knocked FTSE 100 copper miners — Antofagasta down 4% and Anglo American down 3.5% — and contributed to a 150-point slide in the FTSE 100 to 10,630 amid broader investor jitters after an escalating US‑Israeli campaign against Iran pushed oil to its highest level in over a year. The development complicates the demand-driven narrative from the energy transition and AI infrastructure buildout and increases near-term downside risk for copper-linked equities.

Analysis

Market structure: Record Chinese refined copper output (~1.2mt this month, +4.6% MoM, YTD +10%) shifts near-term pricing power to smelters and consumers, hurting pure-play copper miners (e.g., Antofagasta ANTO, Anglo American AAL) and boosting Chinese bonded stock influence. Energy producers and oil-exporting nations gain from geopolitically-driven oil upside, which also raises mining input costs and compresses margins for higher-cost producers.

Risk assessment: Immediate (days) risk is sentiment and flow-driven: miners can gap 5–10% on headlines; short-term (weeks–months) hinges on LME and Shanghai warehouse builds—if inventories rise >10% from last month expect sustained price pressure. Long-term (quarters–years) demand drivers (EVs, grid, AI datacenters) support structural consumption growth of mid-single digits CAGR, so deficits can reappear; tail risks include major geopolitical escalation, Chinese demand collapse or large smelter outages.

Trade implications: Tactical short bias on copper-focused equities for 2–8 weeks, hedge portfolio copper exposure with 3-month put spreads on COPX or CME copper to protect against a 10–25% downside; rotate into diversified miners (RIO.L, BHP.L) and higher-quality assets with lower unit costs. Cross-asset: watch AUD/CLP weakness as leading indicators; rising oil >$95 likely forces miners’ margins and bond spreads wider—tighten credit exposure.

Contrarian angle: The market may be overstating a sustained glut—Chinese output can be inventory-driven/seasonal and reversible; a 4% production uptick is not a structural demand shock. If LME stocks stop rising or Chinese apparent demand rebounds post-stimulus, short squeezes and mean reversion could produce 15–30% rebounds in oversold miners within 3–9 months.