〔Overnight Brief〕Copper Stack Tightens: Teck Highland Valley Strike Notice Sets Oct 24 Clock, Grupo Mexico Cuts 2026 Guidance, BHP Anchors 3-4% CAGR to 2035 — LME Tin Rides Chip Stocks

0. Overnight Arc

Copper's long-end story is being re-anchored by BHP's 3-4% production CAGR to 2035 ^[1], yet the near-term stack just thickened on three independent prints: Teck received a strike notice at Highland Valley with the earliest action 8 a.m. Pacific Oct 24 ^[2], Grupo Mexico trimmed 2026 guidance by ~8,000 tons ^[3], and First Quantum's Kansanshi ran 8% above design ^[4]. Lithium, meanwhile, is bifurcated — Chile is gearing up for five more tenders to more than double output ^[5], even as the listed Chinese duo's earnings have exploded while their stocks are roughly halved ^[6]. LME nickel led base metals on the close; tin rode chip stocks higher in Shanghai ^[7][8].

1. Copper Supply: Three Names, One Tightening Stack

• **[NEW] Teck Resources:** confirmed receipt of a strike notice from USW Local 7619 at Highland Valley Copper; earliest walkout 8 a.m. Pacific Oct 24 (Beijing 23:00); the collective agreement expired Sept 30; operations continue, contingency plans are in place ^[2].
• **[NEW] Grupo Mexico:** Q3 net profit $2 billion, +56% YoY; revenue $6.33 billion, +38%; cut 2026 copper guidance to 1.026 million tons from 1.034 million tons ^[3].
• **[NEW] First Quantum (Kansanshi):** the $1.2 billion S3 expansion is on track for ~27 million tons of ore throughput in 2026, ~8% above design; copper output expected to roughly double to ~277,000 tons/year; a new 25 million-ton sulfide line is the expansion's core ^[4].
• **[ONGOING] BHP:** current plans support a copper production CAGR of 3-4% to 2035 ^[1].
• **[ESCALATED] Producer and smelter side:** extreme-low TC/RCs are shifting market focus to smelter performance, with domestic maintenance rising and refined copper supply expected to tighten; Chile's state copper company set the European copper premium at a record $350/ton ^[9].

2. LME and SHFE Price Action

• **[NEW] LME close (mixed band):** copper $14,371 (-0.59%); aluminium $3,032.5 (+0.18%); nickel $16,280 (+2.94%); lead $1,904.5 (+0.34%); tin $51,045 (-0.98%); zinc $3,754 (+0.35%) ^[7]. A second feed printed copper -$64 to $14,356, aluminium +$39 to $3,042, zinc +$30 to $3,755, lead +$16 to $1,910, nickel +$572 to $16,234, tin -$86 to $51,248 ^[10] — quote the LME print as a band, not a point.
• **[NEW] SHFE copper (main):** +0.18% to 109,390 yuan; supply-side constraints (Los Bronces disruption from record snowfall, low ex-US inventories, smelter maintenance) provide support; US refined copper tariff policy remains pending ^[9].
• **[NEW] SHFE tin (main):** +1.77% to 387,230 yuan; macro headwinds eased as USD and US Treasury yields pulled back, and chip stocks — including Korean semis — recovered, with the AI/compute-metal narrative partially returning; balance remains tight, but downstream terminal orders are still rigid-demand, low-mood ^[8].

3. Lithium: Output Plans Up, Equity Pain Down

• **[NEW] Chile:** Mining Minister Daniel Mas told Reuters at LME Week the country plans to tender five more lithium projects next year, aiming to more than double output within a decade and shifting the model to private-sector-led development ^[5].
• **[ONGOING] Ganfeng Lithium (002460.SZ):** Q1-3 revenue 36.159 billion yuan, +147.24% YoY; net profit 5.012 billion yuan, +19,540.5% YoY; non-GAAP net profit 4.636 billion yuan, +592.14%; basic EPS 2.4 yuan, +23,900% ^[6].
• **[ONGOING] Tianqi Lithium (002466.SZ):** YTD stock drawdown 41.54% (Ganfeng) and 34.72% (Tianqi), each roughly halved from year-to-date highs; lithium compound prices pulled back from May highs on new capacity, rising imported ore supply, and slower downstream procurement ^[6].
• **[NEW] LFP:** high-end lithium iron phosphate supply remains tight amid fresh large orders ^[11]; battery-grade lithium carbonate and spodumene concentrate spot prices published ^[12].

4. China September Metals Output (NBS)

• **[NEW] National Bureau of Statistics:** September refined (electrolytic) copper 1.26 million tons, +1.10% YoY; Jan-Sept cumulative 11.282 million tons, +3.30% YoY. Alumina 8.40 million tons, +5.50% YoY; cumulative +3.90%. Lead 628,000 tons, +0.30% YoY; cumulative -7.10%. Zinc 607,000 tons, -5.50% YoY; cumulative +1.80%. Aluminium alloy 1.667 million tons, -3.40% YoY; cumulative +2.10%. Copper materials 2.05 million tons, -7.70% YoY; cumulative -3.80%. Aluminium materials 5.829 million tons, -2.40% YoY; cumulative -1.60% ^[13].

5. What Falsifies the Bull Case

• The Teck strike clock is the nearest catalyst — a settlement before 8 a.m. Pacific Oct 24 removes the near-term supply premium; the collective agreement has already been expired since Sept 30, so a deal can come at any time ^[2].
• US refined copper tariff policy has been "delayed" without further progress; tariff relief would weaken the COMEX-LME spread and the ex-US inventory support ^[9].
• Tin is leveraged to chip stocks, and the AI sector pullback is not yet declared over; another leg down in global chip names would drag tin back ^[8].
• Source quality control: the two LME close prints differ by tens of dollars on most contracts — quote the band, not a point ^[7][10]; the Kansanshi throughput and Teck strike timing are single-source corporate/union reports, treat as confirmed facts but watch for revision ^[2][4].