〔Overnight Brief〕Copper Tests $14,800 Tariff Bid While LME Closes Mixed and Lithium Breaks the 'Golden September' Trade — Fankou Restarts, Codelco Slips to End-2026

0. Overnight Arc

The "Golden September" seasonal bid for lithium carbonate failed to materialize — futures broke lower even as the short-term supply-demand balance is still expected to stay tight ^[1]. On the LME tape the close was mixed, not directional: copper +0.78% to $14,224, aluminum +0.63% to $3,273, nickel +1.25% to $16,140, but zinc -0.47% to $3,813.5 ^[2]. Net: a tariff-conditional upside in copper ^[3] is being set against a slow drip of supply returns — Fankou restarts ^[4], MMG's deal strategy ^[5], and Codelco's slipped timeline ^[6].

1. LME Tape — Mixed, Not Directional

• **[NEW] LME close (Sept 16):** aluminum +0.63% at $3,273; copper +0.78% at $14,224; nickel +1.25% to $16,140; lead +0.37% at $1,882.5; tin +0.72% to $52,460; zinc -0.47% to $3,813.5 ^[2]. Zinc the only loser; lead the laggard on the upside.

2. Copper — Tariff Bid vs Supply Reality

• **[NEW] Tariff-conditional print:** copper touched $14,800 on speculation around a US refined-copper tariff, with an implied downside level if the tariff fails to land ^[3]. Source quality: single-source relay, and the "X" downside level was not disclosed ^[3].
• **[NEW] Peru output:** July copper production +3.7% YoY to 236,515 tonnes, per Peru's Energy and Mines Ministry ^[7].
• **[ESCALATED] Codelco:** the Chilean state-owned miner's restructuring plan may not be ready until end-2026, a delay on a much-anticipated strategy meant to address years of stagnant output and mounting costs ^[6].

3. Battery Chain Softness

• **[ESCALATED] Lithium carbonate:** futures posted a sharp pullback into the "Golden September" window, even as the short-term supply-demand balance is still expected to stay tight ^[1]. The disconnect — weak price, tight balance — is the contrarian signal to watch; the Securities Times framing has not yet been corroborated by a second outlet ^[1].
• **[NEW] Nickel sulfate:** downstream battery-material demand has declined, pressuring price, with buyers continuing to seek lower offers ^[8]. Source quality: single-source flash, no quantities or grades cited ^[8].

4. Supply Returns

• **[NEW] Zhongjin Lingnan:** the Fankou lead-zinc mine will resume production from Sept 17 after completing rectification required by Guangdong's Emergency Management Department ^[4]. Direct read-through to LME zinc (-0.47% on the day) and lead (+0.37%) ^[2][4].
• **[ESCALATED] MMG:** the Hong Kong-listed miner (HKG: 1208) is willing to guarantee long-term ferronickel supplies to European customers to rescue its up-to-$500M acquisition of Anglo American's (LON: AAL) Barro Alto and Codemin Brazilian nickel assets, which has stalled on EU regulatory opposition ^[5].

5. Aluminum Complex — Alumina Weak, Venezuela Opens

• **[NEW] Alumina:** weak futures continue to weigh on market sentiment, with producers flagging that lower aluminum prices may prompt smelter-side response ^[9]. Source quality: single-source flash, sentence incomplete in the relay ^[9].
• **[NEW] Venezuela:** reportedly preparing to ship aluminum products to the US market ^[10]. Source quality: single-source market rumor, no volumes, counterparties, or timeline named ^[10].

6. What Would Falsify It

• The bull case for copper requires the refined-copper tariff to land; failure sends the price back to the undisclosed "X" level ^[3]. The lithium "Golden September" thesis is already falsified on price, but Securities Times still flags a tight balance ^[1], so the next round of cathode/restart news is the swing variable. For nickel, MMG's deal-cleverness play ^[5] runs against nickel-sulfate demand erosion ^[8] — the live tension is whether EU concessions on supply guarantees are enough to clear the Anglo deal.