〔Day Digest〕Aluminum Drops 1% to $3,112/t as Q4 Japan Premium Falls 35% to $255/t — Centinela Strike Looms, BHP Exits Kambalda, Copper Awaits China Reopen

0. Weekly Arc

Aluminum set the tone: LME aluminum fell more than 1% to $3,112.0/t ^[1] and the Q4 Japan premium to global producers was agreed at $255/t, down 35% from the prior quarter ^[2]. Yet copper steadied as AI-linked tech stocks hovered near record highs ^[3][4], and the BHP–Gold Fields Kambalda sale locked in the 2024-era nickel exit ^[5]. The decisive variable: China's post-holiday reopen and the Centinela strike vote ^[3][6].

1. Aluminum — Soft Q4 Premium Confirms Bear Lean

• **[NEW] LME aluminum main contract:** fell more than 1% to $3,112.0/t ^[1].
• **[NEW] Q4 Japan aluminum premium:** agreed at $255/t, down 35% from the prior quarter, per sources ^[2]. LME aluminum inventory flat on the day ^[7]. Read: physical demand softening into year-end.
• **[NEW] Guinea bauxite channel:** Beibu Gulf Port opened a direct import route to Chongqing, with 168,000 tons discharged at Fangcheng Port and the first rail batch to Wanzhou on Oct 3; the new rail-sea intermodal cuts total transit by about 25 days vs the traditional Yangtze river-sea route, locking in raw-material supply for Bosai Minerals' Wanzhou base ^[8].

2. Copper — Tariff Distortion, AI Bid, Strike Risk

• **[NEW] LME copper inventory:** fell 3,100t ^[7], while COMEX copper continued to build with Eligible inflows dominant ^[9]. Divergence points to U.S.-bound shipment flow ahead of tariff deadlines.
• **[ESCALATED] Centinela (Chile):** workers rejected further negotiations and are preparing to strike ^[6]. Single-source flag; no output-volume estimate on the wire.
• **[ONGOING] WSJ:** flags U.S. tariff threats as the source of copper market distortions that create risks ^[10].
• **[ONGOING] Bloomberg / market feed:** copper held steady as AI-linked tech stocks hovered near record highs; data-center buildout is a structural demand pillar, but traders await China's post-holiday reopen for the next cue ^[3][4].

3. Lead, Zinc, Tin, Nickel — Quiet Flows and a Kambalda Exit

• **[NEW] LME lead:** orders rose 8,625t, the largest single-day increase since mid-July ^[11]; LME lead inventory fell 225t ^[7].
• **[NEW] LME other inventory moves:** zinc +475t, nickel flat, tin -80t ^[7].
• **[NEW] BHP → Gold Fields (Kambalda):** BHP sold its shuttered Kambalda nickel concentrator in Western Australia and associated tenements to Gold Fields Ltd.; terms undisclosed; Gold Fields will "evaluate the concentrator's long-term use" ^[5]. BHP closed the plant in mid-2024 amid global nickel oversupply and took a $2.5 billion impairment on its nickel assets in 2024 ^[5]. Disposal decisions on the remaining Kambalda nickel refinery, smelter and two large mines are expected by February 2027 ^[5]. Gold Fields is separately weighing a second takeover offer for Northern Star Resources, which holds large gold projects near Kambalda ^[5].

4. Steel — Korean Hydrogen Bet

• **[NEW] South Korean government:** aims to achieve the world's first mass production of hydrogen-reduction steelmaking ^[12]. Single-source policy headline; no capacity, capex or timeline figures on the wire.