〔Overnight Brief〕Alumina Lifts the SHFE Complex 2.24% Overnight, Codelco Posts 11% H1 Output Drop as Chile, Argentina, Bolivia and Peru Sign a Critical-Minerals Pact

0. Overnight Arc

Alumina carried the industrial-metals tape on Thursday night, up 2.24% on SHFE, while the base-metals complex was mixed — Shanghai copper -0.05%, aluminum -0.02%, zinc +0.38%, lead -0.06%, nickel -1.13%, tin -1.00%; aluminum alloy added 0.65% and stainless steel fell 0.18% ^[1]. Two cross-currents frame the next session: a tightening supply narrative from Latin America ^[2][3][4][5] and a near-term demand-side tax shock for lithium batteries in China ^[6].

1. Supply: Codelco and the Latin Pact

• **[ESCALATED] Codelco output:** H1 copper production fell 11% y/y to 564,000 tonnes ^[2]. New CEO Jorge Gomez made restoring productivity the stated priority, with H1 earnings still lifted by higher copper prices offsetting weaker volumes and higher costs ^[4]. Read-through: the price tailwind is doing the heavy lifting while the volume side continues to slip ^[2][4].
• **[NEW] Four-nation Santiago declaration:** Chile, Argentina, Bolivia and Peru signed a joint statement to deepen cooperation on critical minerals — sustainable development, technology exchange, investment — positioning the region as a reliable supplier for the energy transition ^[3][5]. Source quality: two independent wires (Reuters and Jin10) carrying the same event, not yet matched by an operational annex ^[3][5].
• **[NEW] Copper Giant / Mocoa:** drilling intercepted 771 meters, supporting a billion-tonne resource model that the company frames as a candidate for the next generation of large copper mines ^[7]. Single source ^[7].

2. Demand: China's Battery Tax Lands

• **[NEW] Consumption tax effective Sept 1, 2026:** lithium primary batteries and lithium-ion accumulators taxed at 2%; the rate steps up to the statutory 4% from Sept 1, 2027 ^[6]. Multiple cell makers, with Lishen Battery named explicitly, have issued customer notices pre-positioning price increases ^[6]. This ends an 11-year exemption ^[6].
• **[NEW] IEA framing on stockpiles:** stockpiling costs are "operational – coming from financing, warehousing, discounting & logistics," with the upfront spend recovered when stocks are rotated or released ^[8]. Read-through: state-led reserve build-outs in critical minerals are working-capital intensive, not pure balance-sheet items ^[8].

3. Macro Backdrop

• **[ONGOING] China industrial profits (July):** cumulative revenue +6.5% y/y and profit +17.6% y/y, with single-month readings decelerating — revenue +3.3% and profit +8.6% versus June's +5.8% and +12.3% ^[9]. Mining ran hot at +8.6%/+34.9% cumulative revenue/profit, while black-metals and non-metallic minerals tied to slower fiscal investment pulled the other way ^[9]. This underwrites the upstream-outperforms-downstream split visible in the overnight tape ^[1][9].
• **[ONGOING] IEA — EV export buffer:** China's total car sales fell more than 20% in H1 2026 y/y, but EV exports rose more than 120% ^[10]. Battery-metals demand support is running through exports, not the domestic market ^[10].

4. What Would Falsify the Story

• The Santiago declaration is a framework, not a contract — operational follow-through (joint vehicles, shared infrastructure, harmonized permitting) is unverified beyond the two wire reports ^[3][5]. A September Codelco production update will test whether the 11% H1 shortfall is a one-off or a glide path ^[2][4]. The Sept 1 battery tax is set to take effect on schedule; any deferral or rate cut would unwind the lithium cost-push narrative, and the 2027 step-up to 4% is already on the calendar ^[6].