〔Day Digest〕Copper Stalks $15,000 as US Tariff Gravity Drains LME; LME Zinc Cracks $4,000 First Time Since 2022 — Mid-East Flare Pulls the Complex Off Highs

0. Weekly Arc

The industrial-metals complex printed an LME index record on Tuesday, with copper at a fresh high and zinc's first close above $4,000/ton since May 2022 ^[1][2]. Yet the same session ended with the complex retreating as Iran-US hostilities in the Persian Gulf reintroduced growth-risk premia and pushed Brent back toward $100 ^[3][2]. The mechanism is US tariff arbitrage draining ex-US inventories into COMEX registered warehouses, which have now risen 21 consecutive weeks ^[4]. On the policy side, Mexico closed a year-long probe with a final $1.58/kg anti-dumping duty on Chinese aluminum bars and profiles ^[5].

1. Copper: Tariff Gravity vs Mid-East Gravity

• **[NEW] LME copper record (Tuesday):** three-month touched $14,779/ton per SMM, while an earlier wire cited $14,617/ton as the new high — print as a range ^[6][7]. European morning Sep 9 had the same contract at $14,685 (-0.3%), prior close $14,728 ^[8].
• **[NEW] $15,000 in view:** Panmure Liberum analyst Tom Price called $15,000/ton "entirely possible" this week given unresolved US tariff posture ^[7].
• **[NEW] Sucden trigger level:** $14,600/ton must hold to keep the breakout; a break opens a sharper pullback given the speed of the recent run ^[8][7].
• **[NEW] COMEX build, 21 weeks running:** an early SMM brief cites registered stocks above 760,000 tons (record) while a later SMM item prints 695,624 tons — quote the dated lower bound; stock is up 31% since mid-April and 53% YTD ^[4][7].
• **[NEW] US July imports:** refined copper imports exceeded 225,000 tons, a monthly record, +8% y/y; the DRC is now the second-largest source at ~15% of total, with July shipments at 53,000 tons versus 31,500 tons for full-year 2024 ^[4].
• **[NEW] DRC note:** Congolese cathode does not meet COMEX deliverable specs, so the volume is being absorbed by physical buyers rather than exchange stocks ^[4].
• **[NEW] Backwardation narrows:** cash-three-month spread compressed to ~$35/ton, signalling near-term supply pressure easing even as headline price sits at record ^[8][4].
• **[NEW] COMEX-LME spread:** still elevated near $190/ton, keeping the US-bound flow open ^[4].
• **[NEW] China A-shares:** copper concepts rallied; Jingyi Co. hit the daily limit for a second session, with Northern Copper, Tongling Nonferrous, Yunnan Copper, Jiangxi Copper and Jintian Copper all advancing ^[6].

2. Zinc Crosses $4,000, Mixed Tape, Mid-East Shock

• **[NEW] Zinc breakout:** LME three-month topped $4,000/ton (intraday $4,045.5) for the first time since May 2022; SHFE zinc gained 1.11% to 27,745 yuan/ton, also a fresh high since May 2022 ^[9][2].
• **[NEW] LME inventory flows (Sep 8):** copper -1,900 tons to 235,825; aluminum flat at 244,525; zinc +300 to 115,675; nickel -84 to 270,924; lead -600 to 384,450; tin -75 to 5,260 ^[10][11].
• **[NEW] Canceled-warrant moves:** lead saw the largest swing — registered +6,700 tons while canceled fell 7,300 tons, returning metal to the available pool; tin registered -240 tons while canceled +165 ^[12].
• **[ESCALATED] Mid-East flare:** Iran's IRGC said it struck two US warships and eight tankers in retaliation for US strikes on Iranian oil carriers; Brent pushed back toward $100 and re-priced growth risk into metals ^[2].
• **[NEW] Dollar three-day slide:** pressured metals broadly, with SHFE base metals mostly higher ex-tin; only SHFE tin (-0.1%) closed lower, while COMEX palladium dropped 2.86% ^[9][13].
• **[NEW] Bloomberg read:** industrial metals retreated as escalating Mideast hostilities "underscored lingering headwinds" after the LME index hit an all-time high ^[3].

3. Lithium: Price Up, New Tech Online, Producers Push Back

• **[NEW] MMLC battery-grade carbonate:** mid-price 142,950 yuan/ton, up 200 yuan/ton from prior session's 16:30 close ^[14].
• **[NEW] GFEX warrants Sep 9:** lithium carbonate 49,797 lots (+374 d/d); polysilicon 24,200 lots (-100); silicon metal 33,494 lots (unchanged) ^[15].
• **[NEW] Rubidium/cesium breakthrough:** the world's first 500-ton/year continuous tower-extraction line for low-grade associated Rb/Cs — built by the Institute of Process Engineering, Chinese Academy of Sciences, with Ganfeng Lithium — reached stable full-process output, with cesium and rubidium carbonate both at ≥99.9% purity and already on sale ^[16].
• **[ONGOING] Bikita tantalum line:** China Mineral Resources confirmed a JV at Bikita, Zimbabwe with a 2 million-ton/year tantalum concentrate line, expected output 150-200 tons/year, split 50:50 with the partner ^[17].
• **[ONGOING] Zhabuye Phase II:** Tibet Mineral Industry said its nanofiltration + MVR process is the world's first scaled high-altitude application; ramp-up "needs a cycle" but conditions are improving ^[18].
• **[NEW] Producer complaint:** two major Chinese lithium producers are publicly calling for higher standards and consistent methodology from third-party data providers, citing price impact — no individual firm named in the wire ^[19].
• **[ONGOING] Market view:** analyst column argues Ganfeng Lithium's diversified upstream plus battery income may outperform Tianqi Lithium, projecting carbonate in a 150,000-200,000 yuan/ton range in H2 2026 ^[20].

4. Trade Policy, Processing and Demand Side

• **[NEW] Mexico final AD duty:** on Chinese finished and semi-finished aluminum bars and profiles, final rate $1.58/kg, effective Sep 5; the preliminary rate (Dec 2025) was $1.55/kg; the dumping period covered Mar 2023-Jun 2024 ^[5].
• **[NEW] Jintian Copper:** said it has closed the full recycled-copper "recycling — refining — deep processing" loop; H1 2026 high-end recycled copper product sales rose 168% YoY ^[21].
• **[NEW] China copper processing 2025:** total processed copper output 21.54 million tons, +1.4% YoY; wire rod ~49% share; foil the only fast-growing category at +35.4%, led by PCB, lithium-battery foil, PV and storage demand ^[22].
• **[NEW] SMM speaker:** Tong Qingping, chief scientist at China Nonferrous Mining Group, told the SMM South China nonferrous conference that processing is shifting from scale expansion to "high-end, lightweight, green" ^[22].
• **[ONGOING] Iron ore:** China August imports 108.54 million tons, +0.4% m/m and +3.1% y/y, beating analyst expectations of 107-108 million tons, as July typhoons delayed customs clearance ^[23].
• **[ONGOING] Indian steel:** mills expected to raise prices further as post-monsoon infrastructure and auto demand revives while coking coal costs lift production costs ^[24].

5. What Decides Next

• **Wednesday:** US Treasury details on bond buybacks are the next macro input for metals, per Marex senior base-metals strategist Alastair Munro ^[7].
• **Friday:** US August CPI — a hot print could strengthen the dollar and trigger copper profit-taking per Sucden Financial, while a soft print would extend the rally toward $15,000 ^[7].
• **Tariff binary:** whether the proposed 15% (2027) / 30% (2028) refined copper tariff is implemented remains the variable behind the COMEX-LME spread and US-bound flows ^[4][7].
• **Source quality:** the COMEX stock print is conflicted — an early SMM brief cites ">760,000 tons" while a later SMM item prints 695,624 tons; quote the dated lower bound and flag the gap ^[4][7]. The "two lithium producers" item lacks individual attribution ^[19]. The LME copper record is split between $14,617/ton (early wire) and $14,779/ton (later SMM) — print as a range ^[6][7].